/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 15:37:22,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 15:37:22,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 15:37:22,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 15:37:22,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 15:37:22,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 15:37:22,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 15:37:22,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 15:37:22,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 15:37:22,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 15:37:22,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 15:37:22,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 15:37:22,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 15:37:22,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 15:37:22,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 15:37:22,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 15:37:22,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 15:37:22,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 15:37:22,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 15:37:22,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 15:37:22,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 15:37:22,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 15:37:22,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 15:37:22,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 15:37:22,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 15:37:22,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 15:37:22,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 15:37:22,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 15:37:22,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 15:37:22,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 15:37:22,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 15:37:22,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 15:37:22,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 15:37:22,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 15:37:22,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 15:37:22,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 15:37:22,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 15:37:22,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 15:37:22,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 15:37:22,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 15:37:22,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 15:37:22,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2019-12-18 15:37:22,601 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 15:37:22,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 15:37:22,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 15:37:22,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 15:37:22,604 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 15:37:22,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 15:37:22,604 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 15:37:22,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 15:37:22,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 15:37:22,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 15:37:22,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 15:37:22,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 15:37:22,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 15:37:22,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 15:37:22,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 15:37:22,607 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 15:37:22,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 15:37:22,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 15:37:22,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 15:37:22,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 15:37:22,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 15:37:22,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 15:37:22,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 15:37:22,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 15:37:22,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 15:37:22,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 15:37:22,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 15:37:22,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 15:37:22,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 15:37:22,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 15:37:22,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 15:37:22,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 15:37:22,903 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 15:37:22,903 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 15:37:22,904 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 15:37:22,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492f2a14f/29677e2766f842288e3695efa7cf5fc0/FLAG2f670eac2 [2019-12-18 15:37:23,541 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 15:37:23,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-18 15:37:23,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492f2a14f/29677e2766f842288e3695efa7cf5fc0/FLAG2f670eac2 [2019-12-18 15:37:23,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/492f2a14f/29677e2766f842288e3695efa7cf5fc0 [2019-12-18 15:37:23,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 15:37:23,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 15:37:23,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 15:37:23,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 15:37:23,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 15:37:23,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:37:23" (1/1) ... [2019-12-18 15:37:23,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437523fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:23, skipping insertion in model container [2019-12-18 15:37:23,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:37:23" (1/1) ... [2019-12-18 15:37:23,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 15:37:23,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 15:37:24,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:37:24,428 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 15:37:24,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:37:24,564 INFO L208 MainTranslator]: Completed translation [2019-12-18 15:37:24,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24 WrapperNode [2019-12-18 15:37:24,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 15:37:24,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 15:37:24,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 15:37:24,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 15:37:24,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 15:37:24,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 15:37:24,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 15:37:24,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 15:37:24,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 15:37:24,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 15:37:24,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 15:37:24,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 15:37:24,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (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 15:37:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 15:37:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 15:37:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 15:37:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 15:37:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 15:37:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 15:37:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 15:37:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 15:37:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 15:37:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 15:37:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 15:37:24,707 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 15:37:25,082 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 15:37:25,083 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 15:37:25,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:37:25 BoogieIcfgContainer [2019-12-18 15:37:25,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 15:37:25,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 15:37:25,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 15:37:25,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 15:37:25,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 03:37:23" (1/3) ... [2019-12-18 15:37:25,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e344d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:37:25, skipping insertion in model container [2019-12-18 15:37:25,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (2/3) ... [2019-12-18 15:37:25,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e344d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:37:25, skipping insertion in model container [2019-12-18 15:37:25,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:37:25" (3/3) ... [2019-12-18 15:37:25,096 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2019-12-18 15:37:25,105 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 15:37:25,105 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 15:37:25,111 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 15:37:25,112 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 15:37:25,144 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,144 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,145 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,146 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,146 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,147 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,147 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,147 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,148 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,148 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,148 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,149 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,149 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,150 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,151 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,151 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,152 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,152 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,152 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,152 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,154 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,154 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,155 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,155 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,155 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,156 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,156 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,156 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,157 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,157 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,161 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,168 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,169 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,169 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,169 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,170 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,170 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,185 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 15:37:25,202 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 15:37:25,202 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 15:37:25,202 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 15:37:25,202 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 15:37:25,202 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 15:37:25,203 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 15:37:25,203 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 15:37:25,203 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 15:37:25,216 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 15:37:25,217 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 15:37:25,255 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 15:37:25,256 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:37:25,264 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 15:37:25,270 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 15:37:25,287 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 15:37:25,287 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:37:25,289 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 15:37:25,292 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 15:37:25,293 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 15:37:26,554 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 15:37:26,671 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 15:37:26,671 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 15:37:26,675 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 15:37:26,685 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 15:37:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 15:37:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 15:37:26,694 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:26,695 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 15:37:26,695 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 15:37:26,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:26,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009564711] [2019-12-18 15:37:26,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:26,951 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 15:37:26,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009564711] [2019-12-18 15:37:26,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:26,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 15:37:26,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294666386] [2019-12-18 15:37:26,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 15:37:26,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 15:37:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 15:37:26,975 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 15:37:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,009 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 15:37:27,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 15:37:27,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 15:37:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,023 INFO L225 Difference]: With dead ends: 54 [2019-12-18 15:37:27,023 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 15:37:27,025 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 15:37:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 15:37:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 15:37:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 15:37:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 15:37:27,063 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 15:37:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,063 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 15:37:27,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 15:37:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 15:37:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 15:37:27,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,064 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,065 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 15:37:27,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410406705] [2019-12-18 15:37:27,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,163 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 15:37:27,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410406705] [2019-12-18 15:37:27,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:27,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 15:37:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225346397] [2019-12-18 15:37:27,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 15:37:27,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 15:37:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,167 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 15:37:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,196 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 15:37:27,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 15:37:27,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 15:37:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,201 INFO L225 Difference]: With dead ends: 42 [2019-12-18 15:37:27,201 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 15:37:27,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 15:37:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 15:37:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 15:37:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 15:37:27,216 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 15:37:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,216 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 15:37:27,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 15:37:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 15:37:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 15:37:27,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,218 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,218 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 15:37:27,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516661329] [2019-12-18 15:37:27,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,328 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 15:37:27,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516661329] [2019-12-18 15:37:27,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:27,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 15:37:27,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865698534] [2019-12-18 15:37:27,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 15:37:27,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 15:37:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,332 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 15:37:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,351 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 15:37:27,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 15:37:27,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 15:37:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,356 INFO L225 Difference]: With dead ends: 51 [2019-12-18 15:37:27,357 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 15:37:27,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 15:37:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 15:37:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 15:37:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 15:37:27,369 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 15:37:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,369 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 15:37:27,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 15:37:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 15:37:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 15:37:27,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,372 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,373 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 15:37:27,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609052853] [2019-12-18 15:37:27,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,489 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 15:37:27,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609052853] [2019-12-18 15:37:27,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964418101] [2019-12-18 15:37:27,490 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 15:37:27,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:27,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:27,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:27,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:27,641 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 15:37:27,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:27,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 15:37:27,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479151732] [2019-12-18 15:37:27,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:27,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:27,644 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 15:37:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,681 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 15:37:27,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:27,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 15:37:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,682 INFO L225 Difference]: With dead ends: 56 [2019-12-18 15:37:27,683 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 15:37:27,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 15:37:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 15:37:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 15:37:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 15:37:27,691 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 15:37:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,691 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 15:37:27,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 15:37:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 15:37:27,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,693 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:27,906 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 15:37:27,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112379160] [2019-12-18 15:37:27,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,978 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 15:37:27,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112379160] [2019-12-18 15:37:27,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718549138] [2019-12-18 15:37:27,979 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 15:37:28,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:28,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:28,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:28,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:28,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 15:37:28,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362366781] [2019-12-18 15:37:28,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:28,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:28,066 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 15:37:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,138 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 15:37:28,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:28,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 15:37:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,140 INFO L225 Difference]: With dead ends: 63 [2019-12-18 15:37:28,141 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 15:37:28,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 15:37:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 15:37:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 15:37:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 15:37:28,154 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 15:37:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:28,154 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 15:37:28,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 15:37:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:28,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:28,156 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:28,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,363 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 15:37:28,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:28,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967217481] [2019-12-18 15:37:28,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967217481] [2019-12-18 15:37:28,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075380442] [2019-12-18 15:37:28,469 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 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 15:37:28,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:28,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:28,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:28,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:28,591 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 15:37:28,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:28,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:28,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681277986] [2019-12-18 15:37:28,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:28,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:28,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,594 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 15:37:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,630 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 15:37:28,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:28,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 15:37:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,632 INFO L225 Difference]: With dead ends: 66 [2019-12-18 15:37:28,632 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 15:37:28,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 15:37:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 15:37:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 15:37:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 15:37:28,639 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 15:37:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:28,640 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 15:37:28,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 15:37:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:28,641 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:28,641 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:28,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,845 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 15:37:28,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:28,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591664610] [2019-12-18 15:37:28,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:28,910 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 15:37:28,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591664610] [2019-12-18 15:37:28,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:28,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:37:28,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660347048] [2019-12-18 15:37:28,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:37:28,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:37:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:28,912 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 15:37:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,933 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 15:37:28,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:28,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:37:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,949 INFO L225 Difference]: With dead ends: 68 [2019-12-18 15:37:28,949 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 15:37:28,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 15:37:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 15:37:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 15:37:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 15:37:28,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 15:37:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:28,958 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 15:37:28,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:37:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 15:37:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:28,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:28,961 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:28,961 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 15:37:28,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:28,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207598678] [2019-12-18 15:37:28,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,034 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 15:37:29,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207598678] [2019-12-18 15:37:29,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:29,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:37:29,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456299343] [2019-12-18 15:37:29,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:37:29,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:37:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:29,039 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 15:37:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,069 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 15:37:29,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:29,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:37:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,071 INFO L225 Difference]: With dead ends: 69 [2019-12-18 15:37:29,071 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 15:37:29,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-18 15:37:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 15:37:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 15:37:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 15:37:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 15:37:29,078 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 15:37:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,078 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 15:37:29,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:37:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 15:37:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:29,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,080 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,080 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 15:37:29,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209991612] [2019-12-18 15:37:29,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,130 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 15:37:29,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209991612] [2019-12-18 15:37:29,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379739331] [2019-12-18 15:37:29,131 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 15:37:29,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:29,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:29,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:29,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:29,223 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 15:37:29,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:29,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:29,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015438321] [2019-12-18 15:37:29,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:29,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:29,225 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 15:37:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,301 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 15:37:29,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:29,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 15:37:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,302 INFO L225 Difference]: With dead ends: 77 [2019-12-18 15:37:29,303 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 15:37:29,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 15:37:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 15:37:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 15:37:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 15:37:29,310 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 15:37:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,310 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 15:37:29,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 15:37:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:29,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,311 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:29,518 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 15:37:29,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123851186] [2019-12-18 15:37:29,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,592 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 15:37:29,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123851186] [2019-12-18 15:37:29,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581115686] [2019-12-18 15:37:29,593 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 15:37:29,652 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:29,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:29,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:29,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:29,729 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 15:37:29,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:29,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:29,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968888110] [2019-12-18 15:37:29,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:29,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:29,733 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 15:37:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,767 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 15:37:29,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:29,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 15:37:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,768 INFO L225 Difference]: With dead ends: 80 [2019-12-18 15:37:29,768 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 15:37:29,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 15:37:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 15:37:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 15:37:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 15:37:29,783 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 15:37:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,783 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 15:37:29,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 15:37:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:29,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,785 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:29,991 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 15:37:29,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641734209] [2019-12-18 15:37:29,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:30,046 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 15:37:30,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641734209] [2019-12-18 15:37:30,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454168963] [2019-12-18 15:37:30,047 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 15:37:30,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:30,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:30,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:30,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:30,156 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 15:37:30,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:30,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:30,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719296616] [2019-12-18 15:37:30,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:30,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:30,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:30,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:30,162 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 15:37:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:30,254 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 15:37:30,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:30,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:30,255 INFO L225 Difference]: With dead ends: 81 [2019-12-18 15:37:30,255 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 15:37:30,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 15:37:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 15:37:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 15:37:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 15:37:30,262 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 15:37:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:30,262 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 15:37:30,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 15:37:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:30,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:30,264 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:30,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,468 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 15:37:30,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:30,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711973935] [2019-12-18 15:37:30,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:30,517 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 15:37:30,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711973935] [2019-12-18 15:37:30,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311777979] [2019-12-18 15:37:30,518 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:37:30,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:30,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:30,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:30,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:30,613 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 15:37:30,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:30,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:30,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395431205] [2019-12-18 15:37:30,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:30,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:30,616 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 15:37:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:30,691 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 15:37:30,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:30,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:30,693 INFO L225 Difference]: With dead ends: 85 [2019-12-18 15:37:30,693 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 15:37:30,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 15:37:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 15:37:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 15:37:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 15:37:30,700 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 15:37:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:30,700 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 15:37:30,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 15:37:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:30,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:30,701 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:30,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,909 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 15:37:30,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:30,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149404492] [2019-12-18 15:37:30,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:30,988 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 15:37:30,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149404492] [2019-12-18 15:37:30,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484483828] [2019-12-18 15:37:30,989 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 15:37:31,045 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:31,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:31,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:31,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:31,090 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 15:37:31,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:31,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:31,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628365307] [2019-12-18 15:37:31,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:31,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:31,092 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 15:37:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:31,203 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 15:37:31,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:31,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:31,204 INFO L225 Difference]: With dead ends: 86 [2019-12-18 15:37:31,204 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 15:37:31,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 15:37:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 15:37:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 15:37:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 15:37:31,210 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 15:37:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:31,210 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 15:37:31,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 15:37:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:31,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:31,211 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:31,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,420 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:31,421 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 15:37:31,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:31,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712343236] [2019-12-18 15:37:31,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:31,470 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 15:37:31,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712343236] [2019-12-18 15:37:31,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238268172] [2019-12-18 15:37:31,470 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 15:37:31,511 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:31,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:31,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:31,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:31,563 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 15:37:31,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:31,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:31,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329136098] [2019-12-18 15:37:31,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:31,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:31,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:31,565 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 15:37:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:31,650 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-18 15:37:31,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:31,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:31,652 INFO L225 Difference]: With dead ends: 87 [2019-12-18 15:37:31,652 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 15:37:31,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 15:37:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-18 15:37:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 15:37:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 15:37:31,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 15:37:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:31,657 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 15:37:31,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 15:37:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:31,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:31,659 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:31,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,868 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 15:37:31,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:31,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658235603] [2019-12-18 15:37:31,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:31,930 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 15:37:31,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658235603] [2019-12-18 15:37:31,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225013400] [2019-12-18 15:37:31,931 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:32,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:32,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:32,070 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 15:37:32,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:32,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:32,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146986002] [2019-12-18 15:37:32,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:32,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:32,075 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 15:37:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:32,257 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 15:37:32,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:32,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:32,259 INFO L225 Difference]: With dead ends: 88 [2019-12-18 15:37:32,259 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 15:37:32,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 15:37:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-18 15:37:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 15:37:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 15:37:32,276 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 15:37:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:32,276 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 15:37:32,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 15:37:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:32,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:32,278 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:32,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,484 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 15:37:32,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:32,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196126959] [2019-12-18 15:37:32,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:32,542 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 15:37:32,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196126959] [2019-12-18 15:37:32,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950758260] [2019-12-18 15:37:32,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:32,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:32,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:32,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:32,649 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 15:37:32,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:32,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:32,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720767312] [2019-12-18 15:37:32,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:32,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:32,651 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 15:37:32,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:32,737 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-18 15:37:32,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:37:32,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:32,738 INFO L225 Difference]: With dead ends: 87 [2019-12-18 15:37:32,739 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 15:37:32,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 15:37:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-18 15:37:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 15:37:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 15:37:32,742 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 15:37:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:32,742 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 15:37:32,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 15:37:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:32,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:32,743 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:32,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,950 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 15:37:32,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:32,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830528594] [2019-12-18 15:37:32,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:33,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830528594] [2019-12-18 15:37:33,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199613666] [2019-12-18 15:37:33,032 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,078 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:33,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:33,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:33,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:33,131 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 15:37:33,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:33,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:33,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868065450] [2019-12-18 15:37:33,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:33,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:33,134 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 15:37:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:33,232 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 15:37:33,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:33,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 15:37:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:33,234 INFO L225 Difference]: With dead ends: 92 [2019-12-18 15:37:33,234 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 15:37:33,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 15:37:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 15:37:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 15:37:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 15:37:33,238 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 15:37:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:33,238 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 15:37:33,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 15:37:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:33,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:33,239 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:33,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,442 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 15:37:33,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:33,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409346336] [2019-12-18 15:37:33,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:33,532 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 15:37:33,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409346336] [2019-12-18 15:37:33,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33832845] [2019-12-18 15:37:33,533 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:33,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:33,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:33,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:33,667 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 15:37:33,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:33,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:33,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127902152] [2019-12-18 15:37:33,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:33,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:33,670 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 15:37:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:33,708 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 15:37:33,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:33,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 15:37:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:33,710 INFO L225 Difference]: With dead ends: 95 [2019-12-18 15:37:33,710 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 15:37:33,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 15:37:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 15:37:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:33,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:33,716 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:33,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:33,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:33,716 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:33,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,920 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 15:37:33,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:33,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725602970] [2019-12-18 15:37:33,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:33,986 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 15:37:33,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725602970] [2019-12-18 15:37:33,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326015533] [2019-12-18 15:37:33,987 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 15:37:34,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:34,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:34,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:34,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:34,171 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 15:37:34,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:34,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:34,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555455395] [2019-12-18 15:37:34,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:34,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:34,174 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:34,303 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 15:37:34,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:34,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:34,305 INFO L225 Difference]: With dead ends: 98 [2019-12-18 15:37:34,305 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 15:37:34,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 15:37:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 15:37:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:34,312 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:34,312 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:34,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:34,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:34,313 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:34,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:34,524 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:34,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 15:37:34,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:34,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904587048] [2019-12-18 15:37:34,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:34,577 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 15:37:34,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904587048] [2019-12-18 15:37:34,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889852612] [2019-12-18 15:37:34,578 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 15:37:34,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:34,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:34,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:34,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:34,715 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 15:37:34,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:34,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:34,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041395265] [2019-12-18 15:37:34,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:34,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:34,717 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:34,800 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 15:37:34,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:34,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:34,802 INFO L225 Difference]: With dead ends: 101 [2019-12-18 15:37:34,802 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 15:37:34,803 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 15:37:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 15:37:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:34,806 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:34,807 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:34,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:34,807 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:34,808 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:35,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,012 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 15:37:35,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:35,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040329517] [2019-12-18 15:37:35,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:35,067 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 15:37:35,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040329517] [2019-12-18 15:37:35,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784113656] [2019-12-18 15:37:35,068 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 15:37:35,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:35,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:35,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:35,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:35,253 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 15:37:35,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:35,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:35,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267118118] [2019-12-18 15:37:35,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:35,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:35,255 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:35,416 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 15:37:35,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:37:35,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:35,417 INFO L225 Difference]: With dead ends: 105 [2019-12-18 15:37:35,417 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 15:37:35,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-18 15:37:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 15:37:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 15:37:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:35,421 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:35,421 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:35,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:35,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:35,422 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:35,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,626 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 15:37:35,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:35,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738662000] [2019-12-18 15:37:35,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:35,690 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 15:37:35,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738662000] [2019-12-18 15:37:35,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758707357] [2019-12-18 15:37:35,691 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 15:37:35,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:35,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:35,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:35,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:35,791 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 15:37:35,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:35,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:35,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870765462] [2019-12-18 15:37:35,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:35,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:35,793 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:35,893 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 15:37:35,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:35,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:35,895 INFO L225 Difference]: With dead ends: 103 [2019-12-18 15:37:35,895 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 15:37:35,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 15:37:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 15:37:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 15:37:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 15:37:35,898 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 15:37:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:35,898 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 15:37:35,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 15:37:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:35,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:35,899 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:36,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,103 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 15:37:36,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:36,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700047996] [2019-12-18 15:37:36,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,164 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 15:37:36,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700047996] [2019-12-18 15:37:36,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856955275] [2019-12-18 15:37:36,165 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 15:37:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:36,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:36,312 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 15:37:36,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:36,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:36,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503380723] [2019-12-18 15:37:36,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:36,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:36,314 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 15:37:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:36,460 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 15:37:36,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:36,460 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:36,461 INFO L225 Difference]: With dead ends: 110 [2019-12-18 15:37:36,461 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 15:37:36,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-18 15:37:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 15:37:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 15:37:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:36,465 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:36,465 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:36,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:36,466 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:36,466 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:36,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,673 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 15:37:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:36,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573613395] [2019-12-18 15:37:36,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,741 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 15:37:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573613395] [2019-12-18 15:37:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052530721] [2019-12-18 15:37:36,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:36,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:36,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:36,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:36,880 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 15:37:36,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:36,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705486437] [2019-12-18 15:37:36,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:36,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:36,882 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:37,027 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 15:37:37,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:37,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:37,028 INFO L225 Difference]: With dead ends: 112 [2019-12-18 15:37:37,028 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 15:37:37,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 15:37:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 15:37:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:37,032 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:37,033 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:37,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:37,034 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:37,034 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:37,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,238 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 15:37:37,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:37,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441920508] [2019-12-18 15:37:37,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:37,294 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 15:37:37,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441920508] [2019-12-18 15:37:37,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259637922] [2019-12-18 15:37:37,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:37,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:37,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:37,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:37,416 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 15:37:37,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:37,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:37,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144105987] [2019-12-18 15:37:37,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:37,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:37,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:37,418 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:37,577 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 15:37:37,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:37,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:37,579 INFO L225 Difference]: With dead ends: 106 [2019-12-18 15:37:37,579 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 15:37:37,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 15:37:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 15:37:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:37,584 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:37,584 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:37,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:37,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:37,585 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:37,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,790 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 15:37:37,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:37,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988086804] [2019-12-18 15:37:37,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:37,847 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 15:37:37,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988086804] [2019-12-18 15:37:37,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339160719] [2019-12-18 15:37:37,847 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:37,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:37,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:37,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:37,965 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 15:37:37,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:37,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:37,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818953903] [2019-12-18 15:37:37,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:37,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:37,967 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:38,241 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 15:37:38,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:38,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:38,243 INFO L225 Difference]: With dead ends: 112 [2019-12-18 15:37:38,243 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 15:37:38,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 15:37:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 15:37:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 15:37:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 15:37:38,248 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 15:37:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:38,248 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 15:37:38,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 15:37:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:38,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:38,249 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:38,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:38,452 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 15:37:38,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:38,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955793052] [2019-12-18 15:37:38,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:38,523 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 15:37:38,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955793052] [2019-12-18 15:37:38,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687161840] [2019-12-18 15:37:38,524 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:38,572 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:38,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:38,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:38,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:38,651 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 15:37:38,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:38,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:38,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579000442] [2019-12-18 15:37:38,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:38,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:38,655 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 15:37:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:38,868 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 15:37:38,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:38,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:38,876 INFO L225 Difference]: With dead ends: 115 [2019-12-18 15:37:38,876 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 15:37:38,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 15:37:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 15:37:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:38,880 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:38,880 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:38,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:38,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:38,881 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:39,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,085 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 15:37:39,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:39,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901240031] [2019-12-18 15:37:39,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:39,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901240031] [2019-12-18 15:37:39,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475300658] [2019-12-18 15:37:39,148 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,197 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:39,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:39,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:39,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:39,307 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 15:37:39,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:39,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:39,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116078718] [2019-12-18 15:37:39,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:39,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:39,309 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:39,558 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 15:37:39,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:39,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:39,559 INFO L225 Difference]: With dead ends: 111 [2019-12-18 15:37:39,559 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 15:37:39,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 15:37:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 15:37:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 15:37:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 15:37:39,563 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 15:37:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:39,563 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 15:37:39,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 15:37:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:39,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:39,564 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:39,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,768 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 15:37:39,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:39,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056919714] [2019-12-18 15:37:39,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,826 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 15:37:39,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056919714] [2019-12-18 15:37:39,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100815701] [2019-12-18 15:37:39,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:39,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:39,939 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 15:37:39,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:39,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:39,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907795041] [2019-12-18 15:37:39,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:39,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:39,941 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:40,125 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 15:37:40,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:37:40,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:40,127 INFO L225 Difference]: With dead ends: 109 [2019-12-18 15:37:40,127 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 15:37:40,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 15:37:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 15:37:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 15:37:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 15:37:40,132 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 15:37:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:40,132 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 15:37:40,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 15:37:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:40,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:40,133 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:40,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:40,337 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 15:37:40,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:40,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876147586] [2019-12-18 15:37:40,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:40,413 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 15:37:40,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876147586] [2019-12-18 15:37:40,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323489318] [2019-12-18 15:37:40,414 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:40,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:40,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:40,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:40,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:40,573 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 15:37:40,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:40,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:40,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985884988] [2019-12-18 15:37:40,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:40,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:40,575 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 15:37:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:40,824 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-18 15:37:40,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:40,824 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:40,826 INFO L225 Difference]: With dead ends: 116 [2019-12-18 15:37:40,826 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 15:37:40,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 15:37:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2019-12-18 15:37:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 15:37:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 15:37:40,831 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 15:37:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:40,831 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 15:37:40,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 15:37:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:40,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:40,832 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:41,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,035 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 15:37:41,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:41,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629247084] [2019-12-18 15:37:41,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:41,089 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 15:37:41,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629247084] [2019-12-18 15:37:41,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059638724] [2019-12-18 15:37:41,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:37:41,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:41,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 15:37:41,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:41,190 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 15:37:41,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:41,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:41,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818105186] [2019-12-18 15:37:41,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:41,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:41,192 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 15:37:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:41,356 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 15:37:41,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:41,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:41,358 INFO L225 Difference]: With dead ends: 115 [2019-12-18 15:37:41,358 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 15:37:41,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 15:37:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 15:37:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 15:37:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 15:37:41,363 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 15:37:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:41,364 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 15:37:41,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 15:37:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:41,365 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:41,365 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:41,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,569 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:41,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 15:37:41,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:41,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896454994] [2019-12-18 15:37:41,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:41,639 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 15:37:41,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896454994] [2019-12-18 15:37:41,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509909727] [2019-12-18 15:37:41,640 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:41,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:41,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:41,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:41,750 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 15:37:41,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:41,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:41,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506901625] [2019-12-18 15:37:41,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:41,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:41,752 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 15:37:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:41,873 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 15:37:41,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:41,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 15:37:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:41,875 INFO L225 Difference]: With dead ends: 107 [2019-12-18 15:37:41,875 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 15:37:41,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 15:37:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 15:37:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 15:37:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 15:37:41,879 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 15:37:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:41,879 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 15:37:41,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 15:37:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:41,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:41,880 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:42,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,083 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 15:37:42,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:42,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993355913] [2019-12-18 15:37:42,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:42,153 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 15:37:42,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993355913] [2019-12-18 15:37:42,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315083235] [2019-12-18 15:37:42,154 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:37:42,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:42,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:42,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:42,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:37:42,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 15:37:42,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512800103] [2019-12-18 15:37:42,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:42,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:42,287 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 15:37:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:42,315 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 15:37:42,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:42,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 15:37:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:42,316 INFO L225 Difference]: With dead ends: 124 [2019-12-18 15:37:42,316 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 15:37:42,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 15:37:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 15:37:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 15:37:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 15:37:42,321 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 15:37:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:42,321 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 15:37:42,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 15:37:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:42,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:42,323 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:42,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,523 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 15:37:42,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:42,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160273725] [2019-12-18 15:37:42,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:42,620 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 15:37:42,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160273725] [2019-12-18 15:37:42,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944576777] [2019-12-18 15:37:42,621 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 15:37:42,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:42,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:42,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:42,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:42,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:42,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:42,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254992919] [2019-12-18 15:37:42,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:42,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:42,757 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 15:37:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:42,889 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-18 15:37:42,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:42,890 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:42,891 INFO L225 Difference]: With dead ends: 133 [2019-12-18 15:37:42,891 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 15:37:42,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 15:37:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-18 15:37:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 15:37:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 15:37:42,895 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 15:37:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:42,896 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 15:37:42,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 15:37:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:42,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:42,897 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:43,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:43,097 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 15:37:43,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:43,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312261334] [2019-12-18 15:37:43,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:43,161 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 15:37:43,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312261334] [2019-12-18 15:37:43,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309055358] [2019-12-18 15:37:43,162 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 15:37:43,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:43,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:43,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:43,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:43,295 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 15:37:43,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:43,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:43,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144857133] [2019-12-18 15:37:43,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:43,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:43,296 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 15:37:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:43,410 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-18 15:37:43,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:43,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:43,412 INFO L225 Difference]: With dead ends: 140 [2019-12-18 15:37:43,412 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 15:37:43,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 15:37:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-18 15:37:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 15:37:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 15:37:43,417 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 15:37:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:43,418 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 15:37:43,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 15:37:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:43,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:43,418 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:43,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:43,622 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 15:37:43,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:43,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906377439] [2019-12-18 15:37:43,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:43,684 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 15:37:43,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906377439] [2019-12-18 15:37:43,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292731059] [2019-12-18 15:37:43,685 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 15:37:43,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:43,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:43,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:43,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:44,614 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 15:37:44,616 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 15:37:44,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:44,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:44,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057545641] [2019-12-18 15:37:44,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:44,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:44,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:44,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=115, Unknown=1, NotChecked=0, Total=182 [2019-12-18 15:37:44,618 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 15:37:44,878 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 15:37:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:44,894 INFO L93 Difference]: Finished difference Result 142 states and 323 transitions. [2019-12-18 15:37:44,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:44,894 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:44,896 INFO L225 Difference]: With dead ends: 142 [2019-12-18 15:37:44,896 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 15:37:44,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=237, Unknown=1, NotChecked=0, Total=380 [2019-12-18 15:37:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 15:37:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-12-18 15:37:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 15:37:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 15:37:44,901 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 15:37:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:44,902 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 15:37:44,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 15:37:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:44,902 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:44,902 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:45,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,106 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 15:37:45,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:45,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416202104] [2019-12-18 15:37:45,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,168 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 15:37:45,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416202104] [2019-12-18 15:37:45,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322494331] [2019-12-18 15:37:45,168 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 15:37:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:45,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:45,295 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 15:37:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:45,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:45,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278714871] [2019-12-18 15:37:45,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:45,297 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 15:37:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:45,433 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-18 15:37:45,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:45,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:45,434 INFO L225 Difference]: With dead ends: 142 [2019-12-18 15:37:45,434 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 15:37:45,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 15:37:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-18 15:37:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 15:37:45,439 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 15:37:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:45,440 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 15:37:45,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 15:37:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:45,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:45,441 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:45,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,644 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 15:37:45,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:45,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650226975] [2019-12-18 15:37:45,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,725 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 15:37:45,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650226975] [2019-12-18 15:37:45,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839973954] [2019-12-18 15:37:45,726 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 15:37:45,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:45,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:45,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:45,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:45,864 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 15:37:45,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:45,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:45,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625764408] [2019-12-18 15:37:45,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:45,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:45,866 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 15:37:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:46,083 INFO L93 Difference]: Finished difference Result 153 states and 349 transitions. [2019-12-18 15:37:46,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:46,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:46,085 INFO L225 Difference]: With dead ends: 153 [2019-12-18 15:37:46,085 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 15:37:46,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 15:37:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2019-12-18 15:37:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 15:37:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-18 15:37:46,089 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-18 15:37:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:46,090 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-18 15:37:46,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-18 15:37:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:46,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:46,090 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:46,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:46,294 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 15:37:46,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:46,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115376163] [2019-12-18 15:37:46,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:46,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115376163] [2019-12-18 15:37:46,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351842415] [2019-12-18 15:37:46,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:37:46,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:46,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:46,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:46,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:46,598 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 15:37:46,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:46,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:46,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274076958] [2019-12-18 15:37:46,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:46,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:46,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:46,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:46,600 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 14 states. [2019-12-18 15:37:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:46,895 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2019-12-18 15:37:46,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:46,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:46,897 INFO L225 Difference]: With dead ends: 158 [2019-12-18 15:37:46,897 INFO L226 Difference]: Without dead ends: 157 [2019-12-18 15:37:46,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-18 15:37:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2019-12-18 15:37:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 15:37:46,904 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 15:37:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:46,905 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 15:37:46,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 15:37:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:46,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:46,906 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:47,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:47,112 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 15:37:47,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:47,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934136868] [2019-12-18 15:37:47,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:47,180 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 15:37:47,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934136868] [2019-12-18 15:37:47,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547480048] [2019-12-18 15:37:47,181 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 15:37:47,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:47,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:47,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:47,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:47,346 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 15:37:47,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:47,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:47,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923188261] [2019-12-18 15:37:47,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:47,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:47,347 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 15:37:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:47,586 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2019-12-18 15:37:47,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:47,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:47,588 INFO L225 Difference]: With dead ends: 146 [2019-12-18 15:37:47,588 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 15:37:47,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 15:37:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2019-12-18 15:37:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-18 15:37:47,593 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-18 15:37:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:47,593 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-18 15:37:47,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-18 15:37:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:47,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:47,594 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:47,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:47,798 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 15:37:47,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:47,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000703990] [2019-12-18 15:37:47,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:47,859 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 15:37:47,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000703990] [2019-12-18 15:37:47,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190381528] [2019-12-18 15:37:47,859 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:47,900 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:47,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:47,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:47,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:48,001 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 15:37:48,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:48,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:48,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199063558] [2019-12-18 15:37:48,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:48,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:48,005 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 14 states. [2019-12-18 15:37:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:48,182 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 15:37:48,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:48,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:48,183 INFO L225 Difference]: With dead ends: 143 [2019-12-18 15:37:48,184 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 15:37:48,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 15:37:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-18 15:37:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 15:37:48,191 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 15:37:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:48,191 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 15:37:48,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 15:37:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:48,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:48,193 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:48,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:48,397 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 15:37:48,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:48,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626084507] [2019-12-18 15:37:48,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:48,460 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 15:37:48,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626084507] [2019-12-18 15:37:48,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548167605] [2019-12-18 15:37:48,460 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:48,510 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:48,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:48,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:48,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:48,618 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 15:37:48,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:48,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:48,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929598099] [2019-12-18 15:37:48,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:48,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:48,620 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 15:37:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:48,819 INFO L93 Difference]: Finished difference Result 159 states and 361 transitions. [2019-12-18 15:37:48,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:48,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:48,821 INFO L225 Difference]: With dead ends: 159 [2019-12-18 15:37:48,822 INFO L226 Difference]: Without dead ends: 158 [2019-12-18 15:37:48,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-18 15:37:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2019-12-18 15:37:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 15:37:48,826 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 15:37:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:48,826 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 15:37:48,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 15:37:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:48,827 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:48,827 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:49,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:49,030 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 15:37:49,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:49,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214468110] [2019-12-18 15:37:49,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:49,093 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 15:37:49,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214468110] [2019-12-18 15:37:49,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385803273] [2019-12-18 15:37:49,094 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:37:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:49,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:49,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:49,230 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 15:37:49,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:49,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:49,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922099687] [2019-12-18 15:37:49,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:49,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:49,232 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 15:37:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:50,003 INFO L93 Difference]: Finished difference Result 170 states and 378 transitions. [2019-12-18 15:37:50,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:50,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:50,004 INFO L225 Difference]: With dead ends: 170 [2019-12-18 15:37:50,004 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 15:37:50,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=298, Unknown=1, NotChecked=0, Total=462 [2019-12-18 15:37:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 15:37:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2019-12-18 15:37:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 15:37:50,009 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 15:37:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:50,009 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 15:37:50,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 15:37:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:50,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:50,010 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:50,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,213 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 15:37:50,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:50,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313850903] [2019-12-18 15:37:50,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:50,278 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 15:37:50,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313850903] [2019-12-18 15:37:50,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233127903] [2019-12-18 15:37:50,278 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:50,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:50,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:50,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:50,394 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 15:37:50,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:50,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:50,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316662118] [2019-12-18 15:37:50,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:50,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:50,397 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 15:37:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:50,658 INFO L93 Difference]: Finished difference Result 167 states and 376 transitions. [2019-12-18 15:37:50,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:50,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:50,659 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:37:50,659 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 15:37:50,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:37:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 15:37:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 15:37:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:50,664 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:50,664 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:50,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:50,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:50,665 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:50,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,869 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:50,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 15:37:50,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:50,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788034644] [2019-12-18 15:37:50,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:50,925 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 15:37:50,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788034644] [2019-12-18 15:37:50,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240623365] [2019-12-18 15:37:50,925 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:50,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:50,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:50,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:51,055 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 15:37:51,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:51,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:51,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698929362] [2019-12-18 15:37:51,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:51,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:51,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:51,057 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:51,278 INFO L93 Difference]: Finished difference Result 169 states and 380 transitions. [2019-12-18 15:37:51,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:51,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:51,282 INFO L225 Difference]: With dead ends: 169 [2019-12-18 15:37:51,282 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 15:37:51,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 15:37:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2019-12-18 15:37:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 15:37:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 15:37:51,286 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 15:37:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:51,286 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 15:37:51,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 15:37:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:51,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:51,287 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:51,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:51,488 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 15:37:51,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:51,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967270203] [2019-12-18 15:37:51,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:51,547 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 15:37:51,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967270203] [2019-12-18 15:37:51,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140891346] [2019-12-18 15:37:51,548 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:51,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:51,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:51,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:51,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:51,658 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 15:37:51,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:51,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:51,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384241875] [2019-12-18 15:37:51,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:51,660 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 15:37:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:51,856 INFO L93 Difference]: Finished difference Result 166 states and 380 transitions. [2019-12-18 15:37:51,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:51,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:51,858 INFO L225 Difference]: With dead ends: 166 [2019-12-18 15:37:51,858 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 15:37:51,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 15:37:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 15:37:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:51,863 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:51,864 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:51,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:51,864 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:51,864 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:52,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,068 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 15:37:52,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:52,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959884579] [2019-12-18 15:37:52,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:52,131 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 15:37:52,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959884579] [2019-12-18 15:37:52,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552758590] [2019-12-18 15:37:52,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:52,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:52,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:52,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:52,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:52,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:52,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235741358] [2019-12-18 15:37:52,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:52,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:52,274 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:52,485 INFO L93 Difference]: Finished difference Result 163 states and 371 transitions. [2019-12-18 15:37:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:37:52,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:52,487 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:37:52,487 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:37:52,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:37:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-18 15:37:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:52,491 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:52,491 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:52,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:52,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:52,492 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:52,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,696 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 15:37:52,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:52,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902734525] [2019-12-18 15:37:52,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:52,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902734525] [2019-12-18 15:37:52,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528558501] [2019-12-18 15:37:52,756 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,796 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:52,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:52,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:52,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:52,860 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 15:37:52,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:52,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:52,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588003074] [2019-12-18 15:37:52,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:52,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:52,862 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:53,075 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2019-12-18 15:37:53,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:53,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:53,077 INFO L225 Difference]: With dead ends: 152 [2019-12-18 15:37:53,077 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 15:37:53,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 15:37:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2019-12-18 15:37:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:53,081 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:53,082 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:53,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:53,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:53,083 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:53,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:53,285 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 15:37:53,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:53,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586316982] [2019-12-18 15:37:53,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:53,353 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 15:37:53,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586316982] [2019-12-18 15:37:53,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237792034] [2019-12-18 15:37:53,354 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:53,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:53,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:53,491 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 15:37:53,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:53,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:53,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893014587] [2019-12-18 15:37:53,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:53,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:53,492 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:53,884 INFO L93 Difference]: Finished difference Result 167 states and 372 transitions. [2019-12-18 15:37:53,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:53,885 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:53,886 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:37:53,886 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 15:37:53,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 15:37:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-18 15:37:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-18 15:37:53,891 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-18 15:37:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:53,891 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-18 15:37:53,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-18 15:37:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:53,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:53,892 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:54,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,096 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 15:37:54,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:54,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514997597] [2019-12-18 15:37:54,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:54,187 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 15:37:54,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514997597] [2019-12-18 15:37:54,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061892824] [2019-12-18 15:37:54,188 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 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 15:37:54,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:54,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:54,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:54,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:54,309 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 15:37:54,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:54,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:54,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852329077] [2019-12-18 15:37:54,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:54,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:54,311 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 14 states. [2019-12-18 15:37:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:54,559 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2019-12-18 15:37:54,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:54,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:54,567 INFO L225 Difference]: With dead ends: 160 [2019-12-18 15:37:54,567 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 15:37:54,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:37:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 15:37:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2019-12-18 15:37:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:54,570 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:54,571 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:54,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:54,571 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:54,572 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:54,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,775 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:54,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 15:37:54,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:54,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129516247] [2019-12-18 15:37:54,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:54,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129516247] [2019-12-18 15:37:54,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127135978] [2019-12-18 15:37:54,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:37:54,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:54,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:54,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:54,959 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 15:37:54,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:54,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:54,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798755268] [2019-12-18 15:37:54,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:54,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:54,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:54,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:54,961 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:55,302 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2019-12-18 15:37:55,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:37:55,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:55,304 INFO L225 Difference]: With dead ends: 162 [2019-12-18 15:37:55,304 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:37:55,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:37:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2019-12-18 15:37:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:55,309 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:55,309 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:55,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:55,310 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:55,310 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:55,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:55,513 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 15:37:55,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:55,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548345968] [2019-12-18 15:37:55,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:55,577 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 15:37:55,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548345968] [2019-12-18 15:37:55,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697475105] [2019-12-18 15:37:55,578 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:55,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:55,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:55,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:55,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:55,753 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 15:37:55,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:55,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:55,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098024284] [2019-12-18 15:37:55,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:55,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:55,754 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:56,063 INFO L93 Difference]: Finished difference Result 178 states and 396 transitions. [2019-12-18 15:37:56,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:37:56,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:56,065 INFO L225 Difference]: With dead ends: 178 [2019-12-18 15:37:56,065 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 15:37:56,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 15:37:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-18 15:37:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:56,069 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:56,070 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:56,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:56,070 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:56,070 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:56,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:56,271 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 15:37:56,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:56,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944158462] [2019-12-18 15:37:56,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:56,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944158462] [2019-12-18 15:37:56,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438222125] [2019-12-18 15:37:56,339 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:56,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:56,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:56,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:56,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:56,477 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 15:37:56,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:56,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:56,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047970669] [2019-12-18 15:37:56,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:56,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:56,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:56,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:56,479 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:56,772 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2019-12-18 15:37:56,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:56,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:56,778 INFO L225 Difference]: With dead ends: 178 [2019-12-18 15:37:56,778 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 15:37:56,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 15:37:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-18 15:37:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 15:37:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 15:37:56,782 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 15:37:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:56,782 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 15:37:56,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 15:37:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:56,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:56,783 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:56,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:56,985 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 15:37:56,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:56,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889603633] [2019-12-18 15:37:56,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:57,044 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 15:37:57,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889603633] [2019-12-18 15:37:57,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316134733] [2019-12-18 15:37:57,045 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:57,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:57,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:57,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:57,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:57,205 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 15:37:57,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:57,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:57,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185329560] [2019-12-18 15:37:57,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:57,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:57,208 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 15:37:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:57,516 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-18 15:37:57,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:37:57,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:57,518 INFO L225 Difference]: With dead ends: 161 [2019-12-18 15:37:57,518 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 15:37:57,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:37:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 15:37:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2019-12-18 15:37:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 15:37:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 15:37:57,521 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 15:37:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:57,522 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 15:37:57,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 15:37:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:57,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:57,522 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:57,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:57,726 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 15:37:57,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:57,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883964176] [2019-12-18 15:37:57,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:57,793 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 15:37:57,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883964176] [2019-12-18 15:37:57,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146089056] [2019-12-18 15:37:57,794 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:57,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:57,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:57,899 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 15:37:57,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:57,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:57,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28754574] [2019-12-18 15:37:57,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:57,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:57,902 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 15:37:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:58,157 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2019-12-18 15:37:58,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:37:58,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:58,160 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:37:58,160 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 15:37:58,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 15:37:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-18 15:37:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 15:37:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 15:37:58,164 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 15:37:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:58,164 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 15:37:58,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 15:37:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:58,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:58,165 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:58,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,368 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 15:37:58,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:58,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425212662] [2019-12-18 15:37:58,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:58,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425212662] [2019-12-18 15:37:58,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60867791] [2019-12-18 15:37:58,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:58,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:58,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:58,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:58,546 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 15:37:58,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:58,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:58,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069596294] [2019-12-18 15:37:58,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:58,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:58,548 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 15:37:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:58,780 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-18 15:37:58,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:37:58,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:58,786 INFO L225 Difference]: With dead ends: 182 [2019-12-18 15:37:58,786 INFO L226 Difference]: Without dead ends: 180 [2019-12-18 15:37:58,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-18 15:37:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 129. [2019-12-18 15:37:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 15:37:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 15:37:58,791 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 15:37:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:58,791 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 15:37:58,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 15:37:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:58,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:58,792 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:58,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,995 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 15:37:58,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:58,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887406643] [2019-12-18 15:37:58,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:59,060 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 15:37:59,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887406643] [2019-12-18 15:37:59,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000949256] [2019-12-18 15:37:59,061 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:59,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:59,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:59,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:59,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:59,162 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 15:37:59,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:59,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:59,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670243890] [2019-12-18 15:37:59,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:59,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:59,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:59,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:59,164 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 15:37:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:59,438 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-18 15:37:59,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:37:59,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:59,440 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:37:59,441 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 15:37:59,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:37:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 15:37:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-18 15:37:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 15:37:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 311 transitions. [2019-12-18 15:37:59,444 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 311 transitions. Word has length 12 [2019-12-18 15:37:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:59,444 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 311 transitions. [2019-12-18 15:37:59,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 311 transitions. [2019-12-18 15:37:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:59,445 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:59,445 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:59,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:59,649 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 15:37:59,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:59,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242934869] [2019-12-18 15:37:59,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:59,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242934869] [2019-12-18 15:37:59,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107021719] [2019-12-18 15:37:59,708 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 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 15:37:59,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:59,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:59,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:59,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:59,848 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 15:37:59,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:59,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:59,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173968602] [2019-12-18 15:37:59,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:59,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:59,850 INFO L87 Difference]: Start difference. First operand 131 states and 311 transitions. Second operand 14 states. [2019-12-18 15:38:00,193 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-18 15:38:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:00,448 INFO L93 Difference]: Finished difference Result 176 states and 396 transitions. [2019-12-18 15:38:00,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:00,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:00,451 INFO L225 Difference]: With dead ends: 176 [2019-12-18 15:38:00,451 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 15:38:00,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:38:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 15:38:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-18 15:38:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 15:38:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-18 15:38:00,454 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-18 15:38:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:00,455 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-18 15:38:00,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-18 15:38:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:00,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:00,456 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:00,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:00,658 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 15:38:00,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:00,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434812006] [2019-12-18 15:38:00,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:00,729 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 15:38:00,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434812006] [2019-12-18 15:38:00,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978419189] [2019-12-18 15:38:00,730 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:00,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:38:00,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:00,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:00,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:00,927 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 15:38:00,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:00,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:00,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444143844] [2019-12-18 15:38:00,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:00,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:00,929 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 16 states. [2019-12-18 15:38:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:01,066 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 15:38:01,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:01,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 15:38:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:01,067 INFO L225 Difference]: With dead ends: 143 [2019-12-18 15:38:01,067 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 15:38:01,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 15:38:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-18 15:38:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 15:38:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-18 15:38:01,071 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-18 15:38:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:01,071 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-18 15:38:01,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-18 15:38:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:01,072 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:01,072 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:01,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,276 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 15:38:01,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:01,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092533264] [2019-12-18 15:38:01,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:01,336 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 15:38:01,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092533264] [2019-12-18 15:38:01,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811732504] [2019-12-18 15:38:01,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,391 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:01,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:01,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:01,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:01,504 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 15:38:01,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:01,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:01,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937612541] [2019-12-18 15:38:01,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:01,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:01,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:01,506 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 16 states. [2019-12-18 15:38:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:01,672 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-18 15:38:01,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:01,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:01,674 INFO L225 Difference]: With dead ends: 154 [2019-12-18 15:38:01,674 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 15:38:01,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 15:38:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-18 15:38:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 15:38:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-18 15:38:01,679 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-18 15:38:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:01,679 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-18 15:38:01,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-18 15:38:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:01,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:01,679 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:01,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,880 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 15:38:01,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:01,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383878081] [2019-12-18 15:38:01,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:01,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383878081] [2019-12-18 15:38:01,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570651400] [2019-12-18 15:38:01,949 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,993 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:01,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:01,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:01,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:02,089 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 15:38:02,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:02,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:02,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516860014] [2019-12-18 15:38:02,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:02,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:02,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:02,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:02,091 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 16 states. [2019-12-18 15:38:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:02,254 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-18 15:38:02,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:02,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:02,256 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:38:02,256 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:38:02,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:38:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-18 15:38:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 15:38:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-18 15:38:02,260 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-18 15:38:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:02,260 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-18 15:38:02,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-18 15:38:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:02,261 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:02,261 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:02,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:02,464 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 15:38:02,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:02,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376497458] [2019-12-18 15:38:02,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:02,538 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 15:38:02,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376497458] [2019-12-18 15:38:02,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040740087] [2019-12-18 15:38:02,539 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:02,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:02,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:02,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:02,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:02,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557278305] [2019-12-18 15:38:02,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:02,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:02,702 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 16 states. [2019-12-18 15:38:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:03,272 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2019-12-18 15:38:03,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:38:03,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:03,274 INFO L225 Difference]: With dead ends: 164 [2019-12-18 15:38:03,274 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:38:03,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=319, Unknown=1, NotChecked=0, Total=506 [2019-12-18 15:38:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:38:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-12-18 15:38:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 15:38:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-18 15:38:03,277 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-18 15:38:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:03,277 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-18 15:38:03,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-18 15:38:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:03,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:03,278 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:03,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,479 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 15:38:03,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:03,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179556779] [2019-12-18 15:38:03,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:03,551 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 15:38:03,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179556779] [2019-12-18 15:38:03,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957899595] [2019-12-18 15:38:03,552 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:03,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:03,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:03,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:03,685 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 15:38:03,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:03,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:03,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995622750] [2019-12-18 15:38:03,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:03,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:03,687 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 16 states. [2019-12-18 15:38:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:03,842 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-18 15:38:03,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:03,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:03,844 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:38:03,844 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 15:38:03,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 15:38:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-18 15:38:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 15:38:03,848 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 15:38:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:03,848 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 15:38:03,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 15:38:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:03,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:03,849 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:04,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:04,053 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 15:38:04,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:04,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93427517] [2019-12-18 15:38:04,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:04,121 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 15:38:04,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93427517] [2019-12-18 15:38:04,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39724402] [2019-12-18 15:38:04,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:04,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:04,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:04,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:04,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:04,354 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 15:38:04,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:04,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:04,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245858365] [2019-12-18 15:38:04,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:04,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:04,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:04,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:04,356 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 15:38:05,353 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:05,388 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2019-12-18 15:38:05,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:38:05,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:05,390 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:38:05,390 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 15:38:05,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:38:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 15:38:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2019-12-18 15:38:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 15:38:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-18 15:38:05,394 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-18 15:38:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:05,394 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-18 15:38:05,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-18 15:38:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:05,395 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:05,395 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:05,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:05,596 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 15:38:05,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:05,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785396049] [2019-12-18 15:38:05,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:05,664 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 15:38:05,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785396049] [2019-12-18 15:38:05,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339616875] [2019-12-18 15:38:05,665 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:05,707 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:05,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:05,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:05,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:06,331 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:38:06,332 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 15:38:06,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:06,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:06,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766934100] [2019-12-18 15:38:06,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:06,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=156, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:06,334 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 16 states. [2019-12-18 15:38:07,116 WARN L192 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:38:07,628 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 15:38:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:07,678 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2019-12-18 15:38:07,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:38:07,678 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:07,680 INFO L225 Difference]: With dead ends: 188 [2019-12-18 15:38:07,680 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 15:38:07,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=198, Invalid=353, Unknown=1, NotChecked=0, Total=552 [2019-12-18 15:38:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 15:38:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2019-12-18 15:38:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 15:38:07,684 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 15:38:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:07,684 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 15:38:07,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 15:38:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:07,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:07,685 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:07,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:07,886 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 15:38:07,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:07,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73391767] [2019-12-18 15:38:07,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:07,953 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 15:38:07,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73391767] [2019-12-18 15:38:07,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795340044] [2019-12-18 15:38:07,954 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:08,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:08,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:08,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:08,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:09,012 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:38:09,013 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 15:38:09,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:09,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:09,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83068569] [2019-12-18 15:38:09,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:09,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:09,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=151, Unknown=2, NotChecked=0, Total=240 [2019-12-18 15:38:09,014 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 15:38:09,442 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-18 15:38:10,022 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:10,568 WARN L192 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:38:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:10,579 INFO L93 Difference]: Finished difference Result 168 states and 377 transitions. [2019-12-18 15:38:10,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:38:10,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:10,581 INFO L225 Difference]: With dead ends: 168 [2019-12-18 15:38:10,581 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 15:38:10,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=209, Invalid=341, Unknown=2, NotChecked=0, Total=552 [2019-12-18 15:38:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 15:38:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2019-12-18 15:38:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 15:38:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 15:38:10,584 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-18 15:38:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:10,585 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 15:38:10,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 15:38:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:10,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:10,586 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:10,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:10,787 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:10,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 15:38:10,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:10,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79736787] [2019-12-18 15:38:10,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:10,878 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 15:38:10,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79736787] [2019-12-18 15:38:10,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734621644] [2019-12-18 15:38:10,879 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:10,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:10,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:10,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:10,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:11,023 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 15:38:11,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:11,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:11,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320025677] [2019-12-18 15:38:11,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:11,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:11,024 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 16 states. [2019-12-18 15:38:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:11,180 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-18 15:38:11,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:11,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:11,181 INFO L225 Difference]: With dead ends: 165 [2019-12-18 15:38:11,182 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 15:38:11,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 15:38:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-18 15:38:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 15:38:11,186 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 15:38:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:11,186 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 15:38:11,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 15:38:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:11,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:11,187 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:11,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:11,390 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 15:38:11,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:11,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081518545] [2019-12-18 15:38:11,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:11,467 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 15:38:11,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081518545] [2019-12-18 15:38:11,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904185301] [2019-12-18 15:38:11,468 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:11,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:11,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:11,617 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 15:38:11,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:11,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:11,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14697102] [2019-12-18 15:38:11,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:11,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:11,618 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:11,907 INFO L93 Difference]: Finished difference Result 190 states and 429 transitions. [2019-12-18 15:38:11,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:11,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:11,909 INFO L225 Difference]: With dead ends: 190 [2019-12-18 15:38:11,909 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 15:38:11,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 15:38:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2019-12-18 15:38:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:38:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 15:38:11,914 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-18 15:38:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:11,914 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 15:38:11,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 15:38:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:11,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:11,915 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:12,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:12,118 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:12,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 15:38:12,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:12,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62900603] [2019-12-18 15:38:12,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:12,187 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 15:38:12,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62900603] [2019-12-18 15:38:12,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787806522] [2019-12-18 15:38:12,188 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 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 15:38:12,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:12,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:12,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:12,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:12,338 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 15:38:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012280341] [2019-12-18 15:38:12,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:12,339 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 16 states. [2019-12-18 15:38:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:12,687 INFO L93 Difference]: Finished difference Result 200 states and 448 transitions. [2019-12-18 15:38:12,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:12,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:12,689 INFO L225 Difference]: With dead ends: 200 [2019-12-18 15:38:12,689 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 15:38:12,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 15:38:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2019-12-18 15:38:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 15:38:12,692 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 15:38:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:12,693 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 15:38:12,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 15:38:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:12,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:12,693 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:12,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:12,894 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 15:38:12,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:12,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577813910] [2019-12-18 15:38:12,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:12,956 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 15:38:12,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577813910] [2019-12-18 15:38:12,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194428955] [2019-12-18 15:38:12,957 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 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 15:38:13,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:38:13,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:13,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:13,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:13,133 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 15:38:13,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:13,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:13,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120026735] [2019-12-18 15:38:13,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:13,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:13,134 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:13,558 INFO L93 Difference]: Finished difference Result 195 states and 434 transitions. [2019-12-18 15:38:13,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:13,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:13,560 INFO L225 Difference]: With dead ends: 195 [2019-12-18 15:38:13,560 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 15:38:13,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 15:38:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 138. [2019-12-18 15:38:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 15:38:13,564 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 15:38:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:13,564 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 15:38:13,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 15:38:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:13,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:13,565 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:13,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:13,768 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 15:38:13,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:13,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942567513] [2019-12-18 15:38:13,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:13,838 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 15:38:13,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942567513] [2019-12-18 15:38:13,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932160934] [2019-12-18 15:38:13,839 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:13,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:13,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:13,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:13,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:13,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:13,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233497265] [2019-12-18 15:38:13,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:13,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:13,989 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 15:38:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:14,691 INFO L93 Difference]: Finished difference Result 194 states and 439 transitions. [2019-12-18 15:38:14,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:14,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:14,693 INFO L225 Difference]: With dead ends: 194 [2019-12-18 15:38:14,693 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 15:38:14,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 15:38:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 139. [2019-12-18 15:38:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 15:38:14,697 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 15:38:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:14,697 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 15:38:14,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 15:38:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:14,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:14,698 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:14,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:14,901 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 15:38:14,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:14,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787693990] [2019-12-18 15:38:14,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:14,975 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 15:38:14,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787693990] [2019-12-18 15:38:14,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924482113] [2019-12-18 15:38:14,976 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:15,017 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:15,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:15,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:15,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:15,222 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 15:38:15,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:15,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:15,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235905959] [2019-12-18 15:38:15,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:15,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:15,225 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 15:38:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:15,771 INFO L93 Difference]: Finished difference Result 201 states and 456 transitions. [2019-12-18 15:38:15,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:15,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:15,773 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:38:15,773 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 15:38:15,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 15:38:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 15:38:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 15:38:15,777 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 15:38:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:15,777 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 15:38:15,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 15:38:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:15,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:15,778 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:15,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:15,982 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 15:38:15,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:15,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119896537] [2019-12-18 15:38:15,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:16,073 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 15:38:16,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119896537] [2019-12-18 15:38:16,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115631500] [2019-12-18 15:38:16,074 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:16,119 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:16,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:16,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:16,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:16,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:16,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:16,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381868365] [2019-12-18 15:38:16,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:16,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:16,305 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 15:38:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:16,658 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-18 15:38:16,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:16,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:16,660 INFO L225 Difference]: With dead ends: 186 [2019-12-18 15:38:16,660 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 15:38:16,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 15:38:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2019-12-18 15:38:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-18 15:38:16,665 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-18 15:38:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:16,665 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-18 15:38:16,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-18 15:38:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:16,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:16,665 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:16,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:16,866 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 15:38:16,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:16,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5604201] [2019-12-18 15:38:16,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:16,934 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 15:38:16,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5604201] [2019-12-18 15:38:16,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58313747] [2019-12-18 15:38:16,935 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:16,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:16,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:17,062 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 15:38:17,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:17,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:17,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083007214] [2019-12-18 15:38:17,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:17,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:17,064 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 16 states. [2019-12-18 15:38:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:17,215 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-18 15:38:17,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:17,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:17,217 INFO L225 Difference]: With dead ends: 162 [2019-12-18 15:38:17,217 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:38:17,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:38:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-18 15:38:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:17,221 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:17,222 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:17,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:17,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:17,222 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:17,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:17,425 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 15:38:17,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:17,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125732142] [2019-12-18 15:38:17,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:17,495 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 15:38:17,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125732142] [2019-12-18 15:38:17,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469416941] [2019-12-18 15:38:17,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:17,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:17,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:17,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:17,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:17,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:17,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:17,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967422424] [2019-12-18 15:38:17,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:17,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:17,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:17,630 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:17,879 INFO L93 Difference]: Finished difference Result 183 states and 412 transitions. [2019-12-18 15:38:17,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:17,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:17,881 INFO L225 Difference]: With dead ends: 183 [2019-12-18 15:38:17,882 INFO L226 Difference]: Without dead ends: 182 [2019-12-18 15:38:17,882 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-18 15:38:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-18 15:38:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-18 15:38:17,885 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-18 15:38:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:17,885 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-18 15:38:17,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-18 15:38:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:17,885 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:17,886 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:18,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:18,086 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 15:38:18,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:18,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587116076] [2019-12-18 15:38:18,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:18,204 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 15:38:18,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587116076] [2019-12-18 15:38:18,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838440917] [2019-12-18 15:38:18,205 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:18,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:18,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:18,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:18,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:18,361 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 15:38:18,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:18,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:18,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233643700] [2019-12-18 15:38:18,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:18,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:18,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:18,362 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 16 states. [2019-12-18 15:38:18,956 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 15:38:20,091 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-18 15:38:21,160 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:38:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:21,204 INFO L93 Difference]: Finished difference Result 208 states and 461 transitions. [2019-12-18 15:38:21,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:21,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:21,207 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:38:21,207 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:38:21,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=203, Invalid=396, Unknown=1, NotChecked=0, Total=600 [2019-12-18 15:38:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:38:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 15:38:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:21,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:21,211 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:21,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:21,212 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:21,212 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:21,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:21,415 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 15:38:21,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:21,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413782193] [2019-12-18 15:38:21,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:21,494 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 15:38:21,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413782193] [2019-12-18 15:38:21,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12250921] [2019-12-18 15:38:21,495 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:21,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:21,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:21,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:21,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:21,632 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 15:38:21,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:21,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:21,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420285640] [2019-12-18 15:38:21,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:21,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:21,634 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:21,939 INFO L93 Difference]: Finished difference Result 192 states and 432 transitions. [2019-12-18 15:38:21,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:21,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:21,941 INFO L225 Difference]: With dead ends: 192 [2019-12-18 15:38:21,941 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 15:38:21,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 15:38:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-18 15:38:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-18 15:38:21,945 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-18 15:38:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:21,946 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-18 15:38:21,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-18 15:38:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:21,946 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:21,946 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:22,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:22,150 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 15:38:22,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:22,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707909103] [2019-12-18 15:38:22,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:22,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707909103] [2019-12-18 15:38:22,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986048658] [2019-12-18 15:38:22,212 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 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 15:38:22,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:22,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:22,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:22,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:22,360 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 15:38:22,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:22,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:22,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171065838] [2019-12-18 15:38:22,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:22,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:22,362 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:23,321 INFO L93 Difference]: Finished difference Result 208 states and 458 transitions. [2019-12-18 15:38:23,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:23,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:23,324 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:38:23,324 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:38:23,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=465, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:38:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:38:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 15:38:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:23,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:23,328 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:23,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:23,328 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:23,328 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:23,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:23,529 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 15:38:23,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:23,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876987220] [2019-12-18 15:38:23,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:23,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876987220] [2019-12-18 15:38:23,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444825201] [2019-12-18 15:38:23,597 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:23,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:23,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:23,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:23,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:23,973 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 15:38:23,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:23,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:23,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531899425] [2019-12-18 15:38:23,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:23,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:23,974 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:24,591 INFO L93 Difference]: Finished difference Result 224 states and 504 transitions. [2019-12-18 15:38:24,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:24,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:24,593 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:38:24,593 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 15:38:24,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 15:38:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-12-18 15:38:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 15:38:24,598 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 15:38:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:24,598 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 15:38:24,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 15:38:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:24,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:24,599 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:24,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,802 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 15:38:24,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:24,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531199098] [2019-12-18 15:38:24,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:24,872 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 15:38:24,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531199098] [2019-12-18 15:38:24,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764456601] [2019-12-18 15:38:24,873 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:24,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:24,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:25,013 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 15:38:25,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:25,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:25,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298695326] [2019-12-18 15:38:25,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:25,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:25,014 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 15:38:25,502 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:26,169 INFO L93 Difference]: Finished difference Result 221 states and 494 transitions. [2019-12-18 15:38:26,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:26,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:26,171 INFO L225 Difference]: With dead ends: 221 [2019-12-18 15:38:26,172 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 15:38:26,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=533, Unknown=1, NotChecked=0, Total=812 [2019-12-18 15:38:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 15:38:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2019-12-18 15:38:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:38:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-18 15:38:26,176 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 13 [2019-12-18 15:38:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:26,176 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-18 15:38:26,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-18 15:38:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:26,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:26,177 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:26,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:26,380 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 15:38:26,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:26,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446111686] [2019-12-18 15:38:26,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:26,442 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 15:38:26,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446111686] [2019-12-18 15:38:26,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809212934] [2019-12-18 15:38:26,443 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:26,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:26,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:26,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:26,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:26,567 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 15:38:26,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:26,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:26,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890332887] [2019-12-18 15:38:26,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:26,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:26,570 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 16 states. [2019-12-18 15:38:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:26,851 INFO L93 Difference]: Finished difference Result 199 states and 449 transitions. [2019-12-18 15:38:26,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:26,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:26,853 INFO L225 Difference]: With dead ends: 199 [2019-12-18 15:38:26,853 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 15:38:26,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 15:38:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2019-12-18 15:38:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 15:38:26,857 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 15:38:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:26,857 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 15:38:26,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 15:38:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:26,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:26,858 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:27,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:27,059 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 15:38:27,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:27,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878841901] [2019-12-18 15:38:27,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:27,146 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 15:38:27,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878841901] [2019-12-18 15:38:27,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232545609] [2019-12-18 15:38:27,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:27,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:27,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:27,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:27,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:27,281 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 15:38:27,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:27,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:27,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675136112] [2019-12-18 15:38:27,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:27,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:27,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:27,283 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 15:38:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:27,577 INFO L93 Difference]: Finished difference Result 211 states and 484 transitions. [2019-12-18 15:38:27,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:27,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:27,579 INFO L225 Difference]: With dead ends: 211 [2019-12-18 15:38:27,579 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 15:38:27,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 15:38:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2019-12-18 15:38:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 15:38:27,583 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 15:38:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:27,583 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 15:38:27,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 15:38:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:27,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:27,584 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:27,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:27,785 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 15:38:27,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:27,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89720552] [2019-12-18 15:38:27,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:27,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89720552] [2019-12-18 15:38:27,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81121281] [2019-12-18 15:38:27,869 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:27,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:27,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:27,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:27,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:28,009 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 15:38:28,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:28,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:28,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934018565] [2019-12-18 15:38:28,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:28,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:28,011 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 15:38:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:28,339 INFO L93 Difference]: Finished difference Result 219 states and 500 transitions. [2019-12-18 15:38:28,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:28,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:28,340 INFO L225 Difference]: With dead ends: 219 [2019-12-18 15:38:28,341 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 15:38:28,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 15:38:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2019-12-18 15:38:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 15:38:28,345 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 15:38:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:28,346 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 15:38:28,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 15:38:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:28,347 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:28,347 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:28,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:28,547 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 15:38:28,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:28,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023783822] [2019-12-18 15:38:28,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:28,664 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 15:38:28,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023783822] [2019-12-18 15:38:28,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574617553] [2019-12-18 15:38:28,665 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 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 15:38:28,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:28,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:28,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:28,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:28,861 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 15:38:28,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:28,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:28,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633162683] [2019-12-18 15:38:28,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:28,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:28,863 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 15:38:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:29,155 INFO L93 Difference]: Finished difference Result 210 states and 476 transitions. [2019-12-18 15:38:29,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:29,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:29,157 INFO L225 Difference]: With dead ends: 210 [2019-12-18 15:38:29,158 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 15:38:29,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 15:38:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2019-12-18 15:38:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2019-12-18 15:38:29,161 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 13 [2019-12-18 15:38:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:29,161 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2019-12-18 15:38:29,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2019-12-18 15:38:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:29,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:29,162 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:29,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:29,363 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 15:38:29,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:29,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894889275] [2019-12-18 15:38:29,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:29,447 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 15:38:29,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894889275] [2019-12-18 15:38:29,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402361125] [2019-12-18 15:38:29,448 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:29,488 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:38:29,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:29,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:29,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:29,573 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 15:38:29,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:29,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:29,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180200919] [2019-12-18 15:38:29,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:29,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:29,575 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand 16 states. [2019-12-18 15:38:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:29,945 INFO L93 Difference]: Finished difference Result 206 states and 464 transitions. [2019-12-18 15:38:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:29,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:29,947 INFO L225 Difference]: With dead ends: 206 [2019-12-18 15:38:29,947 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 15:38:29,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 15:38:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2019-12-18 15:38:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:29,951 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:29,951 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:29,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:29,952 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:29,952 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:30,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:30,156 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 15:38:30,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:30,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033938095] [2019-12-18 15:38:30,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:30,224 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 15:38:30,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033938095] [2019-12-18 15:38:30,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970657885] [2019-12-18 15:38:30,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:30,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:30,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:30,359 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 15:38:30,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:30,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:30,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979535430] [2019-12-18 15:38:30,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:30,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:30,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:30,361 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:30,646 INFO L93 Difference]: Finished difference Result 173 states and 386 transitions. [2019-12-18 15:38:30,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:30,647 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:30,648 INFO L225 Difference]: With dead ends: 173 [2019-12-18 15:38:30,648 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 15:38:30,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 15:38:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2019-12-18 15:38:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:30,652 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:30,653 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:30,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:30,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:30,653 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:30,653 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:30,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:30,857 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 15:38:30,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:30,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312000561] [2019-12-18 15:38:30,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:30,931 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 15:38:30,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312000561] [2019-12-18 15:38:30,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064214642] [2019-12-18 15:38:30,932 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:30,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:30,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:30,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:30,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:31,233 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 15:38:31,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:31,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:31,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882144214] [2019-12-18 15:38:31,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:31,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:31,234 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:31,919 WARN L192 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-18 15:38:32,834 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-18 15:38:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:32,902 INFO L93 Difference]: Finished difference Result 189 states and 417 transitions. [2019-12-18 15:38:32,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:32,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:32,904 INFO L225 Difference]: With dead ends: 189 [2019-12-18 15:38:32,904 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 15:38:32,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 15:38:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2019-12-18 15:38:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-18 15:38:32,908 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-18 15:38:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:32,908 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-18 15:38:32,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-18 15:38:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:32,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:32,908 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:33,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,109 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 15:38:33,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:33,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136623413] [2019-12-18 15:38:33,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:33,173 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 15:38:33,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136623413] [2019-12-18 15:38:33,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875585506] [2019-12-18 15:38:33,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:33,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:33,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:33,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:33,310 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 15:38:33,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:33,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:33,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986792592] [2019-12-18 15:38:33,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:33,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:33,312 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 16 states. [2019-12-18 15:38:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:33,617 INFO L93 Difference]: Finished difference Result 182 states and 406 transitions. [2019-12-18 15:38:33,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:33,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:33,619 INFO L225 Difference]: With dead ends: 182 [2019-12-18 15:38:33,619 INFO L226 Difference]: Without dead ends: 181 [2019-12-18 15:38:33,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-18 15:38:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-18 15:38:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:33,623 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:33,623 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:33,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:33,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:33,623 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:33,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,824 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 15:38:33,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:33,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455341524] [2019-12-18 15:38:33,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:33,892 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 15:38:33,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455341524] [2019-12-18 15:38:33,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919705045] [2019-12-18 15:38:33,893 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:33,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:33,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:33,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:34,733 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 15:38:34,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:34,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:34,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048032248] [2019-12-18 15:38:34,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:34,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:34,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:34,736 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:35,244 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-18 15:38:35,575 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-12-18 15:38:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:36,925 INFO L93 Difference]: Finished difference Result 199 states and 439 transitions. [2019-12-18 15:38:36,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:36,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:36,927 INFO L225 Difference]: With dead ends: 199 [2019-12-18 15:38:36,927 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 15:38:36,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=236, Invalid=463, Unknown=3, NotChecked=0, Total=702 [2019-12-18 15:38:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 15:38:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2019-12-18 15:38:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:36,930 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:36,931 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:36,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:36,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:36,932 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:37,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:37,133 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 15:38:37,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:37,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931055203] [2019-12-18 15:38:37,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:37,207 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 15:38:37,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931055203] [2019-12-18 15:38:37,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036187214] [2019-12-18 15:38:37,208 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:37,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:37,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:37,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:37,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:37,879 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 15:38:37,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:37,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:37,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136065468] [2019-12-18 15:38:37,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:37,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:37,880 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:38,458 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:38,996 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 15:38:39,768 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:38:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:39,788 INFO L93 Difference]: Finished difference Result 215 states and 476 transitions. [2019-12-18 15:38:39,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:39,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:39,790 INFO L225 Difference]: With dead ends: 215 [2019-12-18 15:38:39,790 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 15:38:39,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=229, Invalid=472, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:38:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 15:38:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2019-12-18 15:38:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:39,794 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:39,794 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:39,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:39,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:39,795 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:39,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:39,995 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 15:38:39,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:39,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752784242] [2019-12-18 15:38:39,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:40,064 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 15:38:40,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752784242] [2019-12-18 15:38:40,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529195498] [2019-12-18 15:38:40,064 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:40,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:40,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:40,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:40,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:40,572 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 15:38:40,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:40,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:40,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239128565] [2019-12-18 15:38:40,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:40,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:40,573 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:41,267 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 15:38:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:42,141 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2019-12-18 15:38:42,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:42,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:42,143 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:38:42,143 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 15:38:42,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=275, Invalid=535, Unknown=2, NotChecked=0, Total=812 [2019-12-18 15:38:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 15:38:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 15:38:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:42,147 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:42,147 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:42,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:42,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:42,147 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:42,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:42,348 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 15:38:42,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:42,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652497543] [2019-12-18 15:38:42,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:42,423 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 15:38:42,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652497543] [2019-12-18 15:38:42,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562507841] [2019-12-18 15:38:42,424 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:42,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:42,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:42,594 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 15:38:42,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:42,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:42,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819680883] [2019-12-18 15:38:42,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:42,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:42,595 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:43,074 INFO L93 Difference]: Finished difference Result 187 states and 415 transitions. [2019-12-18 15:38:43,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:43,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:43,076 INFO L225 Difference]: With dead ends: 187 [2019-12-18 15:38:43,076 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 15:38:43,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 15:38:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-18 15:38:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 15:38:43,080 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 15:38:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:43,080 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 15:38:43,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 15:38:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:43,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:43,081 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:43,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:43,282 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 15:38:43,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:43,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334186717] [2019-12-18 15:38:43,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:43,352 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 15:38:43,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334186717] [2019-12-18 15:38:43,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759562382] [2019-12-18 15:38:43,353 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:43,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:43,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:43,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:43,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:45,533 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 15:38:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:45,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:45,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677872992] [2019-12-18 15:38:45,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:45,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:45,534 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 15:38:49,940 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 15:38:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:54,292 INFO L93 Difference]: Finished difference Result 207 states and 458 transitions. [2019-12-18 15:38:54,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:54,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:54,294 INFO L225 Difference]: With dead ends: 207 [2019-12-18 15:38:54,294 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 15:38:54,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=246, Invalid=509, Unknown=1, NotChecked=0, Total=756 [2019-12-18 15:38:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 15:38:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2019-12-18 15:38:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:54,298 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:54,298 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:54,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:54,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:54,299 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:54,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:54,500 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 15:38:54,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:54,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68299099] [2019-12-18 15:38:54,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:54,567 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 15:38:54,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68299099] [2019-12-18 15:38:54,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559541952] [2019-12-18 15:38:54,567 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:54,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:54,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:54,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:54,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:54,826 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 15:38:54,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:54,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:54,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093000065] [2019-12-18 15:38:54,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:54,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:54,827 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:55,263 INFO L93 Difference]: Finished difference Result 229 states and 508 transitions. [2019-12-18 15:38:55,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:55,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:55,265 INFO L225 Difference]: With dead ends: 229 [2019-12-18 15:38:55,265 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 15:38:55,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 15:38:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2019-12-18 15:38:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-18 15:38:55,269 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 13 [2019-12-18 15:38:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:55,269 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-18 15:38:55,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-18 15:38:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:55,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:55,270 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:55,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:55,470 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 15:38:55,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:55,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349544666] [2019-12-18 15:38:55,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:55,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349544666] [2019-12-18 15:38:55,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887453011] [2019-12-18 15:38:55,541 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:55,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:55,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:55,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:55,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:55,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:55,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:55,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614480064] [2019-12-18 15:38:55,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:55,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:55,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:55,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:55,722 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-18 15:38:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:56,239 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-18 15:38:56,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:56,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:56,241 INFO L225 Difference]: With dead ends: 214 [2019-12-18 15:38:56,241 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 15:38:56,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:38:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 15:38:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 141. [2019-12-18 15:38:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 15:38:56,246 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 15:38:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:56,246 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 15:38:56,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 15:38:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:56,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:56,247 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:56,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:56,448 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 15:38:56,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:56,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872861843] [2019-12-18 15:38:56,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:56,533 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 15:38:56,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872861843] [2019-12-18 15:38:56,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992967917] [2019-12-18 15:38:56,534 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:56,575 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:56,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:56,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:56,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:56,706 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 15:38:56,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:56,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:56,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653398630] [2019-12-18 15:38:56,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:56,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:56,708 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 15:38:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:57,166 INFO L93 Difference]: Finished difference Result 224 states and 495 transitions. [2019-12-18 15:38:57,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:57,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:57,168 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:38:57,168 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 15:38:57,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 15:38:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2019-12-18 15:38:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:38:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 15:38:57,172 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 15:38:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:57,172 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 15:38:57,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 15:38:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:57,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:57,173 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:57,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:57,373 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 15:38:57,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:57,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554732590] [2019-12-18 15:38:57,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:57,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554732590] [2019-12-18 15:38:57,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281167612] [2019-12-18 15:38:57,441 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:57,483 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:57,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:57,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:57,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:57,560 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 15:38:57,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:57,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:57,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812856281] [2019-12-18 15:38:57,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:57,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:57,562 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 15:38:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:57,890 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-18 15:38:57,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:57,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:57,892 INFO L225 Difference]: With dead ends: 184 [2019-12-18 15:38:57,892 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 15:38:57,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:38:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 15:38:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2019-12-18 15:38:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:38:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:38:57,896 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:38:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:57,897 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:38:57,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:38:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:57,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:57,897 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:58,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,101 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 15:38:58,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:58,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191172803] [2019-12-18 15:38:58,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:58,174 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 15:38:58,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191172803] [2019-12-18 15:38:58,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871246190] [2019-12-18 15:38:58,175 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:58,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:58,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:58,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:58,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:58,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024957347] [2019-12-18 15:38:58,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:58,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:58,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:58,328 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:38:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:58,741 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2019-12-18 15:38:58,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:58,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:58,744 INFO L225 Difference]: With dead ends: 216 [2019-12-18 15:38:58,744 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 15:38:58,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:38:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 15:38:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2019-12-18 15:38:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:38:58,748 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:38:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:58,748 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:38:58,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:38:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:58,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:58,749 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:58,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,951 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 15:38:58,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:58,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145728815] [2019-12-18 15:38:58,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:59,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145728815] [2019-12-18 15:38:59,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953142965] [2019-12-18 15:38:59,023 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:59,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:59,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:59,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:59,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:59,156 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 15:38:59,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:59,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:59,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261188949] [2019-12-18 15:38:59,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:59,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:59,157 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:38:59,812 WARN L192 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:39:01,692 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 15:39:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:01,729 INFO L93 Difference]: Finished difference Result 222 states and 500 transitions. [2019-12-18 15:39:01,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:01,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:01,731 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:01,732 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:39:01,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=252, Invalid=502, Unknown=2, NotChecked=0, Total=756 [2019-12-18 15:39:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:39:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2019-12-18 15:39:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:01,736 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:01,736 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:01,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:01,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:01,737 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:01,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:01,937 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 15:39:01,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:01,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349666359] [2019-12-18 15:39:01,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:02,006 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 15:39:02,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349666359] [2019-12-18 15:39:02,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811961641] [2019-12-18 15:39:02,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:02,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:39:02,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:02,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:02,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:02,149 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 15:39:02,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:02,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:02,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663690246] [2019-12-18 15:39:02,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:02,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:02,151 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:02,581 INFO L93 Difference]: Finished difference Result 226 states and 511 transitions. [2019-12-18 15:39:02,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:02,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:02,584 INFO L225 Difference]: With dead ends: 226 [2019-12-18 15:39:02,584 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 15:39:02,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 15:39:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2019-12-18 15:39:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:39:02,588 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:39:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:02,589 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:39:02,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:39:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:02,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:02,589 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:02,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:02,791 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 15:39:02,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:02,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771615932] [2019-12-18 15:39:02,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:02,875 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 15:39:02,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771615932] [2019-12-18 15:39:02,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234126526] [2019-12-18 15:39:02,876 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:02,919 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:02,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:02,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:02,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:03,007 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 15:39:03,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:03,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:03,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363951673] [2019-12-18 15:39:03,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:03,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:03,008 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:39:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:03,379 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-18 15:39:03,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:39:03,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:03,381 INFO L225 Difference]: With dead ends: 229 [2019-12-18 15:39:03,381 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 15:39:03,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 15:39:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 145. [2019-12-18 15:39:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:03,386 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:03,386 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:03,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:03,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:03,387 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:03,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:03,590 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 15:39:03,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:03,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333999406] [2019-12-18 15:39:03,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:03,661 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 15:39:03,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333999406] [2019-12-18 15:39:03,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77249273] [2019-12-18 15:39:03,662 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:03,701 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:03,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:03,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:03,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:03,797 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 15:39:03,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:03,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:03,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689801951] [2019-12-18 15:39:03,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:03,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:03,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:03,798 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:04,056 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2019-12-18 15:39:04,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:04,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:04,058 INFO L225 Difference]: With dead ends: 219 [2019-12-18 15:39:04,058 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 15:39:04,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:39:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 15:39:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2019-12-18 15:39:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 15:39:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2019-12-18 15:39:04,063 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 13 [2019-12-18 15:39:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:04,063 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2019-12-18 15:39:04,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2019-12-18 15:39:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:04,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:04,064 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:04,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,267 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 15:39:04,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:04,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049281579] [2019-12-18 15:39:04,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:04,338 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 15:39:04,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049281579] [2019-12-18 15:39:04,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425488197] [2019-12-18 15:39:04,339 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,377 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:04,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:04,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:04,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:04,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:04,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:04,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128403735] [2019-12-18 15:39:04,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:04,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:04,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:04,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:04,464 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand 16 states. [2019-12-18 15:39:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:04,860 INFO L93 Difference]: Finished difference Result 222 states and 507 transitions. [2019-12-18 15:39:04,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:39:04,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:04,862 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:04,862 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 15:39:04,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 15:39:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2019-12-18 15:39:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:04,867 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:04,867 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:04,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:04,868 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:04,868 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:05,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:05,071 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 15:39:05,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:05,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820215975] [2019-12-18 15:39:05,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:05,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820215975] [2019-12-18 15:39:05,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599713922] [2019-12-18 15:39:05,153 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:39:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:05,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:05,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:05,299 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 15:39:05,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:05,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:05,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493529748] [2019-12-18 15:39:05,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:05,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:05,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:05,301 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:05,940 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:39:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:05,974 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-18 15:39:05,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:05,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:05,975 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:05,976 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:39:05,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:39:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2019-12-18 15:39:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:39:05,979 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:39:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:05,979 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:39:05,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:39:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:05,980 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:05,980 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:06,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:06,181 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 15:39:06,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:06,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564349396] [2019-12-18 15:39:06,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:06,251 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 15:39:06,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564349396] [2019-12-18 15:39:06,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984181684] [2019-12-18 15:39:06,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:06,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:06,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:06,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:06,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:06,778 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_274 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_274) 2)) (<= (div (+ (* v_~j~0_274 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~j~0_274 c_~j~0 2)))) is different from true [2019-12-18 15:39:06,779 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 15:39:06,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:06,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:06,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026476591] [2019-12-18 15:39:06,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:06,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:06,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:06,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=145, Unknown=1, NotChecked=26, Total=240 [2019-12-18 15:39:06,780 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:39:07,293 WARN L192 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2019-12-18 15:39:07,996 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 15:39:08,177 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-18 15:39:08,992 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 15:39:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:09,018 INFO L93 Difference]: Finished difference Result 222 states and 505 transitions. [2019-12-18 15:39:09,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:09,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:09,020 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:09,020 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:39:09,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=280, Invalid=534, Unknown=2, NotChecked=54, Total=870 [2019-12-18 15:39:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:39:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 142. [2019-12-18 15:39:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:39:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 15:39:09,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 15:39:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:09,024 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 15:39:09,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 15:39:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:09,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:09,025 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:09,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:09,225 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 15:39:09,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:09,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43064249] [2019-12-18 15:39:09,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:09,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43064249] [2019-12-18 15:39:09,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563955732] [2019-12-18 15:39:09,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:39:09,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:09,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:09,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:09,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:09,432 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 15:39:09,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:09,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:09,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596086700] [2019-12-18 15:39:09,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:09,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:09,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:09,434 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 15:39:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:09,704 INFO L93 Difference]: Finished difference Result 163 states and 366 transitions. [2019-12-18 15:39:09,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:39:09,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:09,706 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:39:09,706 INFO L226 Difference]: Without dead ends: 153 [2019-12-18 15:39:09,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:39:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-18 15:39:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2019-12-18 15:39:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:39:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-18 15:39:09,710 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-18 15:39:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:09,710 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-18 15:39:09,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-18 15:39:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:09,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:09,711 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:09,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:09,914 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 15:39:09,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:09,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962908431] [2019-12-18 15:39:09,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:09,995 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 15:39:09,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962908431] [2019-12-18 15:39:09,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804153808] [2019-12-18 15:39:09,996 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 15:39:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:10,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:39:10,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:39:10,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-18 15:39:10,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57827795] [2019-12-18 15:39:10,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:39:10,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:39:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:10,090 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-18 15:39:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:10,111 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-18 15:39:10,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:39:10,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-18 15:39:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:10,113 INFO L225 Difference]: With dead ends: 151 [2019-12-18 15:39:10,114 INFO L226 Difference]: Without dead ends: 137 [2019-12-18 15:39:10,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-18 15:39:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-18 15:39:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:39:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 15:39:10,116 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 15:39:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:10,116 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 15:39:10,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:39:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 15:39:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:10,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:10,117 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:10,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,317 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 94 times [2019-12-18 15:39:10,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:10,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359143186] [2019-12-18 15:39:10,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:10,393 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 15:39:10,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359143186] [2019-12-18 15:39:10,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141186304] [2019-12-18 15:39:10,393 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,436 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:10,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:10,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:10,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:10,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:10,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335412153] [2019-12-18 15:39:10,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:10,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:10,555 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 15:39:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:10,746 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-18 15:39:10,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:10,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:10,747 INFO L225 Difference]: With dead ends: 161 [2019-12-18 15:39:10,747 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 15:39:10,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 15:39:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-18 15:39:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:39:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 15:39:10,751 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 15:39:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:10,751 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 15:39:10,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 15:39:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:10,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:10,752 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:10,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,952 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:10,953 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 95 times [2019-12-18 15:39:10,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:10,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840651733] [2019-12-18 15:39:10,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:11,028 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 15:39:11,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840651733] [2019-12-18 15:39:11,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365988481] [2019-12-18 15:39:11,028 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,070 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:11,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:11,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:11,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:11,177 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 15:39:11,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:11,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:11,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039093805] [2019-12-18 15:39:11,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:11,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:11,179 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 15:39:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:11,383 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-18 15:39:11,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:11,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:11,384 INFO L225 Difference]: With dead ends: 169 [2019-12-18 15:39:11,384 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 15:39:11,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 15:39:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-18 15:39:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 15:39:11,388 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 15:39:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:11,388 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 15:39:11,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 15:39:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:11,389 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:11,389 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:11,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,590 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 96 times [2019-12-18 15:39:11,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:11,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28559809] [2019-12-18 15:39:11,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:11,684 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 15:39:11,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28559809] [2019-12-18 15:39:11,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121377004] [2019-12-18 15:39:11,685 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:11,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:11,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:11,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:11,856 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 15:39:11,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:11,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:11,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185110840] [2019-12-18 15:39:11,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:11,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:11,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:11,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:11,857 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 15:39:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:12,147 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-18 15:39:12,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:39:12,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:12,148 INFO L225 Difference]: With dead ends: 180 [2019-12-18 15:39:12,148 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 15:39:12,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:39:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 15:39:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 15:39:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 15:39:12,151 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 15:39:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:12,152 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 15:39:12,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 15:39:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:12,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:12,152 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:12,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:12,353 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 97 times [2019-12-18 15:39:12,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:12,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910497047] [2019-12-18 15:39:12,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:12,462 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 15:39:12,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910497047] [2019-12-18 15:39:12,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323162844] [2019-12-18 15:39:12,462 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:12,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:12,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:13,341 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 15:39:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:13,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821896599] [2019-12-18 15:39:13,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:39:13,342 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 15:39:13,741 WARN L192 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 15:39:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:13,952 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-18 15:39:13,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:39:13,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:13,953 INFO L225 Difference]: With dead ends: 188 [2019-12-18 15:39:13,953 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 15:39:13,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=222, Invalid=427, Unknown=1, NotChecked=0, Total=650 [2019-12-18 15:39:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 15:39:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2019-12-18 15:39:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 15:39:13,956 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 15:39:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:13,956 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 15:39:13,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 15:39:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:13,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:13,957 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:14,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:14,157 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 98 times [2019-12-18 15:39:14,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:14,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071719522] [2019-12-18 15:39:14,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:14,250 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 15:39:14,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071719522] [2019-12-18 15:39:14,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011614461] [2019-12-18 15:39:14,251 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:14,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:14,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:14,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:14,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:14,393 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 15:39:14,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:14,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:14,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629487794] [2019-12-18 15:39:14,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:14,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:14,395 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 15:39:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:14,590 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-18 15:39:14,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:14,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:14,591 INFO L225 Difference]: With dead ends: 172 [2019-12-18 15:39:14,592 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 15:39:14,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 15:39:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-18 15:39:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 15:39:14,595 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 15:39:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:14,596 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 15:39:14,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 15:39:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:14,596 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:14,596 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:14,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:14,799 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:14,799 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 99 times [2019-12-18 15:39:14,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:14,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542849922] [2019-12-18 15:39:14,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:14,880 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 15:39:14,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542849922] [2019-12-18 15:39:14,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913820431] [2019-12-18 15:39:14,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:39:14,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:14,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:14,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:14,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:15,061 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 15:39:15,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:15,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:15,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726123834] [2019-12-18 15:39:15,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:15,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:15,062 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 15:39:15,716 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-18 15:39:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:15,797 INFO L93 Difference]: Finished difference Result 201 states and 432 transitions. [2019-12-18 15:39:15,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:39:15,798 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:15,799 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:39:15,799 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 15:39:15,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:39:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 15:39:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2019-12-18 15:39:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 15:39:15,803 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 15:39:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:15,803 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 15:39:15,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 15:39:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:15,804 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:15,804 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:16,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,005 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 100 times [2019-12-18 15:39:16,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:16,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387242126] [2019-12-18 15:39:16,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:16,083 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 15:39:16,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387242126] [2019-12-18 15:39:16,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997492785] [2019-12-18 15:39:16,083 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:16,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:16,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:16,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:16,719 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:39:17,097 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_309 Int)) (and (<= c_~j~0 (+ (* 3 v_~j~0_309) 1)) (<= c_~i~0 (+ (* 2 v_~j~0_309) c_~j~0 1)) (<= (div (+ (* v_~j~0_309 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 15:39:17,098 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 15:39:17,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:17,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:17,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470180533] [2019-12-18 15:39:17,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:17,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=178, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:39:17,099 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 15:39:18,122 WARN L192 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-18 15:39:18,945 WARN L192 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 15:39:19,754 WARN L192 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 15:39:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:20,272 INFO L93 Difference]: Finished difference Result 216 states and 457 transitions. [2019-12-18 15:39:20,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:39:20,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:20,273 INFO L225 Difference]: With dead ends: 216 [2019-12-18 15:39:20,273 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 15:39:20,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=259, Invalid=446, Unknown=1, NotChecked=50, Total=756 [2019-12-18 15:39:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 15:39:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2019-12-18 15:39:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 15:39:20,277 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-18 15:39:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:20,277 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 15:39:20,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 15:39:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:20,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:20,278 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:20,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:20,481 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 101 times [2019-12-18 15:39:20,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:20,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605863843] [2019-12-18 15:39:20,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:20,562 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 15:39:20,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605863843] [2019-12-18 15:39:20,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733460368] [2019-12-18 15:39:20,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:20,603 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 15:39:20,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:20,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:20,605 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:20,843 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 15:39:20,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:20,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:20,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263066027] [2019-12-18 15:39:20,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:20,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:20,845 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 18 states. [2019-12-18 15:39:21,892 WARN L192 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 15:39:22,773 WARN L192 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:39:23,205 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 15:39:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:24,750 INFO L93 Difference]: Finished difference Result 197 states and 424 transitions. [2019-12-18 15:39:24,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:24,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:24,753 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:39:24,753 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 15:39:24,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=321, Invalid=548, Unknown=1, NotChecked=0, Total=870 [2019-12-18 15:39:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 15:39:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-18 15:39:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 15:39:24,756 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 15:39:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:24,757 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 15:39:24,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 15:39:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:24,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:24,757 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:24,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:24,958 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 102 times [2019-12-18 15:39:24,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:24,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728269818] [2019-12-18 15:39:24,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:25,054 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 15:39:25,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728269818] [2019-12-18 15:39:25,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730899187] [2019-12-18 15:39:25,055 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:25,099 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:25,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:25,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:25,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:25,642 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:39:25,660 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 15:39:25,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:25,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:25,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090695935] [2019-12-18 15:39:25,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:25,662 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 15:39:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:28,215 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2019-12-18 15:39:28,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:28,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:28,217 INFO L225 Difference]: With dead ends: 205 [2019-12-18 15:39:28,217 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 15:39:28,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=264, Invalid=488, Unknown=4, NotChecked=0, Total=756 [2019-12-18 15:39:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 15:39:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2019-12-18 15:39:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 15:39:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-18 15:39:28,221 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-18 15:39:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:28,221 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-18 15:39:28,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-18 15:39:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:28,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:28,222 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:28,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:28,422 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 103 times [2019-12-18 15:39:28,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:28,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941309716] [2019-12-18 15:39:28,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:28,517 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 15:39:28,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941309716] [2019-12-18 15:39:28,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134467811] [2019-12-18 15:39:28,518 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:28,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:28,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:29,058 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_322 Int)) (and (<= c_~i~0 (+ (* 3 v_~j~0_322) 2)) (<= c_~j~0 (+ c_~i~0 (* 2 v_~j~0_322) 1)) (<= (div (+ (* v_~j~0_322 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 15:39:29,059 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 15:39:29,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:29,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:29,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836744037] [2019-12-18 15:39:29,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:29,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:29,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=177, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:39:29,060 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 18 states. [2019-12-18 15:39:29,505 WARN L192 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 15:39:30,576 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-12-18 15:39:31,570 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 15:39:32,047 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-18 15:39:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:32,480 INFO L93 Difference]: Finished difference Result 227 states and 488 transitions. [2019-12-18 15:39:32,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:39:32,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:32,481 INFO L225 Difference]: With dead ends: 227 [2019-12-18 15:39:32,481 INFO L226 Difference]: Without dead ends: 223 [2019-12-18 15:39:32,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=304, Invalid=509, Unknown=3, NotChecked=54, Total=870 [2019-12-18 15:39:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-18 15:39:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-18 15:39:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-18 15:39:32,485 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-18 15:39:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:32,485 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-18 15:39:32,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-18 15:39:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:32,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:32,486 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:32,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:32,689 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 104 times [2019-12-18 15:39:32,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:32,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904138217] [2019-12-18 15:39:32,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:32,769 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 15:39:32,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904138217] [2019-12-18 15:39:32,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088341485] [2019-12-18 15:39:32,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:32,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:32,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:32,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:32,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:33,710 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 15:39:33,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:33,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:33,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728204532] [2019-12-18 15:39:33,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:33,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:39:33,711 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 18 states. [2019-12-18 15:39:34,773 WARN L192 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 15:39:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:34,875 INFO L93 Difference]: Finished difference Result 192 states and 415 transitions. [2019-12-18 15:39:34,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:39:34,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:34,876 INFO L225 Difference]: With dead ends: 192 [2019-12-18 15:39:34,877 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 15:39:34,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=247, Invalid=454, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:39:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 15:39:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2019-12-18 15:39:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 15:39:34,881 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 15:39:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:34,882 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 15:39:34,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 15:39:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:34,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:34,882 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:35,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,085 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 105 times [2019-12-18 15:39:35,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:35,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74128927] [2019-12-18 15:39:35,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:35,157 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 15:39:35,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74128927] [2019-12-18 15:39:35,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24468296] [2019-12-18 15:39:35,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:35,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:35,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:35,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:35,337 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 15:39:35,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:35,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:35,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898933348] [2019-12-18 15:39:35,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:35,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:35,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:35,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:35,339 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 15:39:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:35,533 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-18 15:39:35,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:35,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:35,535 INFO L225 Difference]: With dead ends: 170 [2019-12-18 15:39:35,535 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:39:35,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:39:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-18 15:39:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:35,538 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:35,538 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:35,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:35,539 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:35,539 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:35,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,740 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 106 times [2019-12-18 15:39:35,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:35,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383323826] [2019-12-18 15:39:35,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:35,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383323826] [2019-12-18 15:39:35,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433513333] [2019-12-18 15:39:35,817 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,860 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:35,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:35,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:35,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:35,996 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 15:39:35,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:35,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:35,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111441835] [2019-12-18 15:39:35,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:35,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:35,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:35,997 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:36,330 INFO L93 Difference]: Finished difference Result 197 states and 428 transitions. [2019-12-18 15:39:36,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:39:36,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:36,331 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:39:36,331 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 15:39:36,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:39:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 15:39:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2019-12-18 15:39:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:36,334 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:36,334 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:36,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:36,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:36,334 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:36,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:36,535 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 107 times [2019-12-18 15:39:36,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:36,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401758053] [2019-12-18 15:39:36,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:36,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401758053] [2019-12-18 15:39:36,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743809937] [2019-12-18 15:39:36,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:36,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:36,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:36,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:36,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:36,779 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 15:39:36,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:36,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:36,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550181956] [2019-12-18 15:39:36,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:36,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:36,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:36,781 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:37,235 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2019-12-18 15:39:37,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:39:37,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:37,236 INFO L225 Difference]: With dead ends: 232 [2019-12-18 15:39:37,236 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 15:39:37,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 15:39:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2019-12-18 15:39:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 15:39:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-18 15:39:37,240 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-18 15:39:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:37,241 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-18 15:39:37,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-18 15:39:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:37,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:37,241 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:37,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:37,442 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 108 times [2019-12-18 15:39:37,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:37,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665831279] [2019-12-18 15:39:37,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:37,529 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 15:39:37,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665831279] [2019-12-18 15:39:37,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576119123] [2019-12-18 15:39:37,533 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:37,577 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:39:37,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:37,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:37,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:37,738 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 15:39:37,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:37,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:37,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529206349] [2019-12-18 15:39:37,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:37,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:37,740 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 18 states. [2019-12-18 15:39:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:38,245 INFO L93 Difference]: Finished difference Result 212 states and 456 transitions. [2019-12-18 15:39:38,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:39:38,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:38,246 INFO L225 Difference]: With dead ends: 212 [2019-12-18 15:39:38,247 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 15:39:38,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 15:39:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2019-12-18 15:39:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:38,250 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:38,250 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:38,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:38,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:38,251 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:38,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:38,452 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:38,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 109 times [2019-12-18 15:39:38,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:38,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525010482] [2019-12-18 15:39:38,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:38,526 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 15:39:38,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525010482] [2019-12-18 15:39:38,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216256582] [2019-12-18 15:39:38,527 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:38,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:38,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:38,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:38,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806654117] [2019-12-18 15:39:38,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:38,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:38,708 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:39,198 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 15:39:39,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:39,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:39,200 INFO L225 Difference]: With dead ends: 220 [2019-12-18 15:39:39,200 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 15:39:39,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 15:39:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2019-12-18 15:39:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 15:39:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-18 15:39:39,204 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-18 15:39:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:39,204 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-18 15:39:39,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-18 15:39:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:39,205 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:39,205 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:39,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:39,406 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:39,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 110 times [2019-12-18 15:39:39,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:39,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258458308] [2019-12-18 15:39:39,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:39,505 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 15:39:39,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258458308] [2019-12-18 15:39:39,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696056252] [2019-12-18 15:39:39,506 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:39,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:39,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:39,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:39,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:39,712 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 15:39:39,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:39,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:39,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758328485] [2019-12-18 15:39:39,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:39,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:39,715 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 18 states. [2019-12-18 15:39:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:40,247 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2019-12-18 15:39:40,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:39:40,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:40,248 INFO L225 Difference]: With dead ends: 252 [2019-12-18 15:39:40,248 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 15:39:40,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 15:39:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2019-12-18 15:39:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 15:39:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 15:39:40,252 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 15:39:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:40,252 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 15:39:40,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 15:39:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:40,252 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:40,252 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:40,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:40,453 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 111 times [2019-12-18 15:39:40,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:40,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763820552] [2019-12-18 15:39:40,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:40,543 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 15:39:40,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763820552] [2019-12-18 15:39:40,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605755279] [2019-12-18 15:39:40,544 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:40,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:39:40,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:40,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:40,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:40,745 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 15:39:40,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:40,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:40,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043502453] [2019-12-18 15:39:40,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:40,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:40,746 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 15:39:42,996 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 15:39:45,231 WARN L192 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 15:39:45,499 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 15:39:49,685 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:39:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:54,126 INFO L93 Difference]: Finished difference Result 246 states and 529 transitions. [2019-12-18 15:39:54,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:54,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:54,128 INFO L225 Difference]: With dead ends: 246 [2019-12-18 15:39:54,128 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:39:54,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:39:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:39:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 152. [2019-12-18 15:39:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:39:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 15:39:54,131 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 15:39:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:54,132 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 15:39:54,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 15:39:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:54,132 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:54,132 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:54,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:54,333 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 112 times [2019-12-18 15:39:54,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:54,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623782134] [2019-12-18 15:39:54,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:54,424 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 15:39:54,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623782134] [2019-12-18 15:39:54,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979176330] [2019-12-18 15:39:54,425 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:54,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:54,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:54,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:54,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:54,612 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 15:39:54,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:54,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:54,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17901630] [2019-12-18 15:39:54,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:54,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:54,614 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 15:39:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:55,628 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-18 15:39:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:39:55,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:55,629 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:39:55,629 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:39:55,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:39:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:39:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2019-12-18 15:39:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:39:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 15:39:55,633 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 15:39:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:55,634 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 15:39:55,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 15:39:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:55,634 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:55,634 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:55,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:55,835 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:55,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 113 times [2019-12-18 15:39:55,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:55,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675691151] [2019-12-18 15:39:55,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:55,915 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 15:39:55,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675691151] [2019-12-18 15:39:55,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998414344] [2019-12-18 15:39:55,915 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:39:55,959 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:55,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:55,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:55,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:58,184 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 15:39:58,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:58,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:58,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959726450] [2019-12-18 15:39:58,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:58,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:58,186 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 15:40:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:03,576 INFO L93 Difference]: Finished difference Result 238 states and 518 transitions. [2019-12-18 15:40:03,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:40:03,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:03,577 INFO L225 Difference]: With dead ends: 238 [2019-12-18 15:40:03,577 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 15:40:03,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:40:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 15:40:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2019-12-18 15:40:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 15:40:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 348 transitions. [2019-12-18 15:40:03,580 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 348 transitions. Word has length 14 [2019-12-18 15:40:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:03,580 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 348 transitions. [2019-12-18 15:40:03,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 348 transitions. [2019-12-18 15:40:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:03,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:03,581 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:03,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:03,784 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 114 times [2019-12-18 15:40:03,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:03,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738534266] [2019-12-18 15:40:03,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:03,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738534266] [2019-12-18 15:40:03,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199375625] [2019-12-18 15:40:03,873 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:03,912 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:40:03,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:03,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:03,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:04,103 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 15:40:04,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:04,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:04,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785549308] [2019-12-18 15:40:04,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:04,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:04,105 INFO L87 Difference]: Start difference. First operand 153 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:04,607 INFO L93 Difference]: Finished difference Result 244 states and 529 transitions. [2019-12-18 15:40:04,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:40:04,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:04,609 INFO L225 Difference]: With dead ends: 244 [2019-12-18 15:40:04,609 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:40:04,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:40:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:40:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2019-12-18 15:40:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 15:40:04,615 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 15:40:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:04,615 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 15:40:04,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 15:40:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:04,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:04,616 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:04,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:04,818 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 115 times [2019-12-18 15:40:04,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:04,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110776827] [2019-12-18 15:40:04,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:04,922 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 15:40:04,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110776827] [2019-12-18 15:40:04,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542061755] [2019-12-18 15:40:04,923 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:04,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:04,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:05,679 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 15:40:05,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:05,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:05,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964553377] [2019-12-18 15:40:05,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:05,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:40:05,682 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 15:40:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:06,350 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2019-12-18 15:40:06,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:06,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:06,352 INFO L225 Difference]: With dead ends: 234 [2019-12-18 15:40:06,352 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 15:40:06,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=591, Unknown=1, NotChecked=0, Total=930 [2019-12-18 15:40:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 15:40:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2019-12-18 15:40:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:40:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 15:40:06,356 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 15:40:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:06,356 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 15:40:06,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 15:40:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:06,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:06,357 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:06,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:06,560 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 116 times [2019-12-18 15:40:06,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:06,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583790789] [2019-12-18 15:40:06,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:06,644 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 15:40:06,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583790789] [2019-12-18 15:40:06,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805137367] [2019-12-18 15:40:06,645 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:06,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:40:06,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:06,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:06,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:07,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:07,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:07,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344133118] [2019-12-18 15:40:07,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:07,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:07,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:07,036 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 15:40:07,741 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:40:07,943 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2019-12-18 15:40:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:08,327 INFO L93 Difference]: Finished difference Result 211 states and 458 transitions. [2019-12-18 15:40:08,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:40:08,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:08,328 INFO L225 Difference]: With dead ends: 211 [2019-12-18 15:40:08,328 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 15:40:08,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:40:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 15:40:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2019-12-18 15:40:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:40:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-18 15:40:08,332 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-18 15:40:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:08,332 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-18 15:40:08,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-18 15:40:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:08,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:08,332 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:08,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:08,533 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 117 times [2019-12-18 15:40:08,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:08,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446877021] [2019-12-18 15:40:08,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:08,616 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 15:40:08,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446877021] [2019-12-18 15:40:08,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185814676] [2019-12-18 15:40:08,617 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:08,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:40:08,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:08,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:08,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:08,766 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 15:40:08,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:08,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:08,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356718452] [2019-12-18 15:40:08,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:08,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:08,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:08,768 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 18 states. [2019-12-18 15:40:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:09,191 INFO L93 Difference]: Finished difference Result 197 states and 429 transitions. [2019-12-18 15:40:09,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:09,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:09,192 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:40:09,192 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 15:40:09,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 15:40:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2019-12-18 15:40:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:09,196 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:09,196 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:09,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:09,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:09,197 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:09,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:09,398 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 118 times [2019-12-18 15:40:09,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:09,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568357732] [2019-12-18 15:40:09,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:09,483 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 15:40:09,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568357732] [2019-12-18 15:40:09,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584165754] [2019-12-18 15:40:09,484 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:09,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:09,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:09,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:09,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:09,666 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 15:40:09,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:09,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:09,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417261573] [2019-12-18 15:40:09,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:09,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:09,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:09,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:09,667 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:10,348 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-18 15:40:10,792 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 15:40:11,390 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:40:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:11,422 INFO L93 Difference]: Finished difference Result 212 states and 459 transitions. [2019-12-18 15:40:11,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:11,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:11,424 INFO L225 Difference]: With dead ends: 212 [2019-12-18 15:40:11,424 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 15:40:11,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:40:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 15:40:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2019-12-18 15:40:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 15:40:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-18 15:40:11,427 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-18 15:40:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:11,427 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-18 15:40:11,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-18 15:40:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:11,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:11,428 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:11,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:11,629 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 119 times [2019-12-18 15:40:11,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:11,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058019976] [2019-12-18 15:40:11,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:11,714 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 15:40:11,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058019976] [2019-12-18 15:40:11,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134908974] [2019-12-18 15:40:11,715 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:11,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 15:40:11,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:11,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:11,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:11,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:11,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:11,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288312181] [2019-12-18 15:40:11,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:11,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:11,877 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 18 states. [2019-12-18 15:40:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:12,275 INFO L93 Difference]: Finished difference Result 210 states and 457 transitions. [2019-12-18 15:40:12,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:12,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:12,276 INFO L225 Difference]: With dead ends: 210 [2019-12-18 15:40:12,276 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 15:40:12,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 15:40:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2019-12-18 15:40:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:12,285 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:12,285 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:12,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:12,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:12,286 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:12,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:12,490 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 120 times [2019-12-18 15:40:12,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:12,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805012943] [2019-12-18 15:40:12,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:12,587 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 15:40:12,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805012943] [2019-12-18 15:40:12,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610921386] [2019-12-18 15:40:12,588 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:12,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:40:12,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:12,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:12,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:12,985 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 15:40:12,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:12,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:12,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613135836] [2019-12-18 15:40:12,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:12,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:12,986 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:13,341 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:40:15,714 WARN L192 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 15:40:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:16,053 INFO L93 Difference]: Finished difference Result 224 states and 482 transitions. [2019-12-18 15:40:16,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:16,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:16,054 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:40:16,055 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 15:40:16,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=285, Invalid=584, Unknown=1, NotChecked=0, Total=870 [2019-12-18 15:40:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 15:40:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 15:40:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:40:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 15:40:16,059 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 15:40:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:16,059 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 15:40:16,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 15:40:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:16,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:16,060 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:16,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:16,264 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 121 times [2019-12-18 15:40:16,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:16,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740015456] [2019-12-18 15:40:16,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:16,352 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 15:40:16,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740015456] [2019-12-18 15:40:16,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482810579] [2019-12-18 15:40:16,353 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:16,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:16,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:18,834 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 15:40:18,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:18,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:18,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971397511] [2019-12-18 15:40:18,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:18,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:40:18,836 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 15:40:19,874 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2019-12-18 15:40:22,515 WARN L192 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:40:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:22,549 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2019-12-18 15:40:22,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:22,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:22,550 INFO L225 Difference]: With dead ends: 254 [2019-12-18 15:40:22,550 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 15:40:22,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=287, Invalid=582, Unknown=1, NotChecked=0, Total=870 [2019-12-18 15:40:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 15:40:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 156. [2019-12-18 15:40:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:40:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-18 15:40:22,554 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-18 15:40:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:22,555 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-18 15:40:22,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-18 15:40:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:22,555 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:22,555 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:22,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:22,756 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 122 times [2019-12-18 15:40:22,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:22,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385548623] [2019-12-18 15:40:22,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:22,843 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 15:40:22,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385548623] [2019-12-18 15:40:22,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164626846] [2019-12-18 15:40:22,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:22,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:40:22,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:22,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:22,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:23,943 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:40:23,944 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 15:40:23,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:23,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:23,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292022032] [2019-12-18 15:40:23,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:23,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:23,945 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 18 states. [2019-12-18 15:40:26,000 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 15:40:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:26,144 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2019-12-18 15:40:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:26,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:26,145 INFO L225 Difference]: With dead ends: 237 [2019-12-18 15:40:26,145 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 15:40:26,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=333, Invalid=657, Unknown=2, NotChecked=0, Total=992 [2019-12-18 15:40:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 15:40:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2019-12-18 15:40:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:26,149 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:26,149 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:26,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:26,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:26,150 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:26,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:26,353 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 123 times [2019-12-18 15:40:26,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:26,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250232235] [2019-12-18 15:40:26,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:26,444 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 15:40:26,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250232235] [2019-12-18 15:40:26,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058937957] [2019-12-18 15:40:26,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:26,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:40:26,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:26,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 15:40:26,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:26,607 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 15:40:26,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:26,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:26,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341502290] [2019-12-18 15:40:26,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:26,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:26,608 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:27,459 INFO L93 Difference]: Finished difference Result 240 states and 512 transitions. [2019-12-18 15:40:27,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 15:40:27,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:27,460 INFO L225 Difference]: With dead ends: 240 [2019-12-18 15:40:27,460 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 15:40:27,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 15:40:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 15:40:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 158. [2019-12-18 15:40:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 15:40:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-18 15:40:27,464 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-18 15:40:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:27,465 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-18 15:40:27,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-18 15:40:27,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:27,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:27,465 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:27,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:27,666 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 124 times [2019-12-18 15:40:27,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:27,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591415838] [2019-12-18 15:40:27,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:27,763 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 15:40:27,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591415838] [2019-12-18 15:40:27,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629459427] [2019-12-18 15:40:27,764 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:27,807 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:27,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:27,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:27,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:32,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:32,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:32,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909622997] [2019-12-18 15:40:32,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:32,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:40:32,853 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 18 states. [2019-12-18 15:40:33,451 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 15:40:35,663 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 15:40:40,319 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:40:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:42,491 INFO L93 Difference]: Finished difference Result 245 states and 532 transitions. [2019-12-18 15:40:42,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:40:42,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:42,492 INFO L225 Difference]: With dead ends: 245 [2019-12-18 15:40:42,492 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 15:40:42,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=328, Invalid=662, Unknown=2, NotChecked=0, Total=992 [2019-12-18 15:40:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 15:40:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2019-12-18 15:40:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-18 15:40:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 366 transitions. [2019-12-18 15:40:42,496 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 366 transitions. Word has length 14 [2019-12-18 15:40:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:42,496 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 366 transitions. [2019-12-18 15:40:42,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 366 transitions. [2019-12-18 15:40:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:42,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:42,497 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:42,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:42,697 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:42,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 125 times [2019-12-18 15:40:42,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:42,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179513005] [2019-12-18 15:40:42,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:42,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179513005] [2019-12-18 15:40:42,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251697997] [2019-12-18 15:40:42,792 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:42,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:40:42,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:42,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:42,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:43,084 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 15:40:43,179 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 15:40:43,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:43,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:43,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312138328] [2019-12-18 15:40:43,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:43,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:43,180 INFO L87 Difference]: Start difference. First operand 160 states and 366 transitions. Second operand 18 states. [2019-12-18 15:40:43,409 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 15:40:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:46,426 INFO L93 Difference]: Finished difference Result 274 states and 600 transitions. [2019-12-18 15:40:46,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:40:46,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:46,428 INFO L225 Difference]: With dead ends: 274 [2019-12-18 15:40:46,428 INFO L226 Difference]: Without dead ends: 272 [2019-12-18 15:40:46,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=335, Invalid=656, Unknown=1, NotChecked=0, Total=992 [2019-12-18 15:40:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-18 15:40:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 167. [2019-12-18 15:40:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-18 15:40:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 392 transitions. [2019-12-18 15:40:46,432 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 392 transitions. Word has length 14 [2019-12-18 15:40:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:46,433 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 392 transitions. [2019-12-18 15:40:46,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 392 transitions. [2019-12-18 15:40:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:46,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:46,434 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:46,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:46,637 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 126 times [2019-12-18 15:40:46,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:46,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26250594] [2019-12-18 15:40:46,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:46,720 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 15:40:46,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26250594] [2019-12-18 15:40:46,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857066758] [2019-12-18 15:40:46,721 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:46,764 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:40:46,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:46,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:46,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:47,814 WARN L192 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:40:48,865 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 15:40:48,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:48,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:48,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768937037] [2019-12-18 15:40:48,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:48,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:48,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:48,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:40:48,867 INFO L87 Difference]: Start difference. First operand 167 states and 392 transitions. Second operand 18 states. [2019-12-18 15:40:49,563 WARN L192 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2019-12-18 15:40:50,661 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:40:52,506 WARN L192 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 15:40:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:52,560 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2019-12-18 15:40:52,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:40:52,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:52,561 INFO L225 Difference]: With dead ends: 265 [2019-12-18 15:40:52,561 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 15:40:52,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=375, Invalid=745, Unknown=2, NotChecked=0, Total=1122 [2019-12-18 15:40:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 15:40:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2019-12-18 15:40:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 15:40:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 382 transitions. [2019-12-18 15:40:52,564 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 382 transitions. Word has length 14 [2019-12-18 15:40:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:52,564 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 382 transitions. [2019-12-18 15:40:52,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 382 transitions. [2019-12-18 15:40:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:52,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:52,565 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:52,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:52,768 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 127 times [2019-12-18 15:40:52,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:52,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11629149] [2019-12-18 15:40:52,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:52,860 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 15:40:52,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11629149] [2019-12-18 15:40:52,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152346340] [2019-12-18 15:40:52,860 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:52,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:52,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:53,564 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_440 Int)) (and (<= (div (+ (* v_~i~0_440 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ c_~j~0 v_~i~0_440)) (<= c_~j~0 (+ (* 2 v_~i~0_440) 2)))) is different from true [2019-12-18 15:40:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-18 15:40:53,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:53,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:53,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20747211] [2019-12-18 15:40:53,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:53,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:53,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=189, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:40:53,589 INFO L87 Difference]: Start difference. First operand 165 states and 382 transitions. Second operand 18 states. [2019-12-18 15:40:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:55,958 INFO L93 Difference]: Finished difference Result 257 states and 555 transitions. [2019-12-18 15:40:55,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 15:40:55,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:55,959 INFO L225 Difference]: With dead ends: 257 [2019-12-18 15:40:55,960 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 15:40:55,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=390, Invalid=801, Unknown=3, NotChecked=66, Total=1260 [2019-12-18 15:40:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 15:40:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 167. [2019-12-18 15:40:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-18 15:40:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 389 transitions. [2019-12-18 15:40:55,969 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 389 transitions. Word has length 14 [2019-12-18 15:40:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:55,969 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 389 transitions. [2019-12-18 15:40:55,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 389 transitions. [2019-12-18 15:40:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:55,969 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:55,969 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:56,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:56,170 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 128 times [2019-12-18 15:40:56,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:56,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782485546] [2019-12-18 15:40:56,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:56,301 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 15:40:56,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782485546] [2019-12-18 15:40:56,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271457959] [2019-12-18 15:40:56,301 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:56,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:40:56,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:56,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:56,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:56,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:56,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:56,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913166853] [2019-12-18 15:40:56,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:56,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:56,524 INFO L87 Difference]: Start difference. First operand 167 states and 389 transitions. Second operand 18 states. [2019-12-18 15:40:57,336 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-18 15:40:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:57,630 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2019-12-18 15:40:57,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 15:40:57,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:57,632 INFO L225 Difference]: With dead ends: 261 [2019-12-18 15:40:57,632 INFO L226 Difference]: Without dead ends: 257 [2019-12-18 15:40:57,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 15:40:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-18 15:40:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 165. [2019-12-18 15:40:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 15:40:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 383 transitions. [2019-12-18 15:40:57,636 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 383 transitions. Word has length 14 [2019-12-18 15:40:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:57,636 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 383 transitions. [2019-12-18 15:40:57,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 383 transitions. [2019-12-18 15:40:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:57,636 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:57,636 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:57,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:57,837 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 129 times [2019-12-18 15:40:57,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:57,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894326852] [2019-12-18 15:40:57,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:57,928 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 15:40:57,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894326852] [2019-12-18 15:40:57,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452960541] [2019-12-18 15:40:57,929 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:57,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:40:57,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:57,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:57,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:58,068 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 15:40:58,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:58,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:58,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259412208] [2019-12-18 15:40:58,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:58,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:58,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:58,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:58,070 INFO L87 Difference]: Start difference. First operand 165 states and 383 transitions. Second operand 18 states. [2019-12-18 15:40:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:58,449 INFO L93 Difference]: Finished difference Result 204 states and 448 transitions. [2019-12-18 15:40:58,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:58,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:58,450 INFO L225 Difference]: With dead ends: 204 [2019-12-18 15:40:58,451 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 15:40:58,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:40:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 15:40:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2019-12-18 15:40:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 15:40:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 380 transitions. [2019-12-18 15:40:58,455 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 380 transitions. Word has length 14 [2019-12-18 15:40:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:58,455 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 380 transitions. [2019-12-18 15:40:58,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 380 transitions. [2019-12-18 15:40:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:58,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:58,456 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:58,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:58,657 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 130 times [2019-12-18 15:40:58,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:58,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155617378] [2019-12-18 15:40:58,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:58,746 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 15:40:58,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155617378] [2019-12-18 15:40:58,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578077296] [2019-12-18 15:40:58,746 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:58,790 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:58,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:58,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:58,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:58,902 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 15:40:58,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:58,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:58,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699856785] [2019-12-18 15:40:58,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:58,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:58,904 INFO L87 Difference]: Start difference. First operand 165 states and 380 transitions. Second operand 18 states. [2019-12-18 15:40:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:59,375 INFO L93 Difference]: Finished difference Result 246 states and 535 transitions. [2019-12-18 15:40:59,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:40:59,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:59,376 INFO L225 Difference]: With dead ends: 246 [2019-12-18 15:40:59,377 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 15:40:59,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:40:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 15:40:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 165. [2019-12-18 15:40:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-18 15:40:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 380 transitions. [2019-12-18 15:40:59,381 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 380 transitions. Word has length 14 [2019-12-18 15:40:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:59,381 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 380 transitions. [2019-12-18 15:40:59,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 380 transitions. [2019-12-18 15:40:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:59,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:59,381 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:59,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:59,582 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 131 times [2019-12-18 15:40:59,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:59,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903820381] [2019-12-18 15:40:59,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:59,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903820381] [2019-12-18 15:40:59,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319932382] [2019-12-18 15:40:59,673 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:59,715 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:40:59,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:59,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:59,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:59,836 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 15:40:59,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:59,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:59,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509778939] [2019-12-18 15:40:59,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:59,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:59,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:59,837 INFO L87 Difference]: Start difference. First operand 165 states and 380 transitions. Second operand 18 states. [2019-12-18 15:41:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:00,360 INFO L93 Difference]: Finished difference Result 256 states and 563 transitions. [2019-12-18 15:41:00,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:00,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:00,362 INFO L225 Difference]: With dead ends: 256 [2019-12-18 15:41:00,362 INFO L226 Difference]: Without dead ends: 250 [2019-12-18 15:41:00,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-18 15:41:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2019-12-18 15:41:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 15:41:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 15:41:00,367 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 15:41:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:00,367 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 15:41:00,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 15:41:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:00,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:00,368 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:00,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:00,571 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 132 times [2019-12-18 15:41:00,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:00,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807478426] [2019-12-18 15:41:00,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:00,653 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 15:41:00,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807478426] [2019-12-18 15:41:00,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927735497] [2019-12-18 15:41:00,653 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:00,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:41:00,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:00,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:00,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:00,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:00,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:00,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665248349] [2019-12-18 15:41:00,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:00,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:00,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:00,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:00,819 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 15:41:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:01,239 INFO L93 Difference]: Finished difference Result 257 states and 559 transitions. [2019-12-18 15:41:01,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:01,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:01,241 INFO L225 Difference]: With dead ends: 257 [2019-12-18 15:41:01,241 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 15:41:01,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 15:41:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 166. [2019-12-18 15:41:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 15:41:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 15:41:01,245 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 15:41:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:01,245 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 15:41:01,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 15:41:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:01,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:01,246 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:01,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:01,446 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 133 times [2019-12-18 15:41:01,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:01,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336987831] [2019-12-18 15:41:01,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:01,534 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 15:41:01,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336987831] [2019-12-18 15:41:01,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592800646] [2019-12-18 15:41:01,535 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:01,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:01,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:01,683 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 15:41:01,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:01,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:01,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081447572] [2019-12-18 15:41:01,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:01,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:01,685 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 15:41:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:02,043 INFO L93 Difference]: Finished difference Result 256 states and 564 transitions. [2019-12-18 15:41:02,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:41:02,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:02,045 INFO L225 Difference]: With dead ends: 256 [2019-12-18 15:41:02,045 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 15:41:02,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:41:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 15:41:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 166. [2019-12-18 15:41:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-18 15:41:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 382 transitions. [2019-12-18 15:41:02,049 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 382 transitions. Word has length 14 [2019-12-18 15:41:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:02,049 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 382 transitions. [2019-12-18 15:41:02,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 382 transitions. [2019-12-18 15:41:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:02,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:02,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:02,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:02,251 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 134 times [2019-12-18 15:41:02,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:02,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982580259] [2019-12-18 15:41:02,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:02,334 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 15:41:02,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982580259] [2019-12-18 15:41:02,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750538808] [2019-12-18 15:41:02,335 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:02,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:41:02,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:02,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:02,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:02,487 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 15:41:02,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:02,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:02,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129323107] [2019-12-18 15:41:02,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:02,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:02,489 INFO L87 Difference]: Start difference. First operand 166 states and 382 transitions. Second operand 18 states. [2019-12-18 15:41:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:02,946 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2019-12-18 15:41:02,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:02,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:02,947 INFO L225 Difference]: With dead ends: 252 [2019-12-18 15:41:02,947 INFO L226 Difference]: Without dead ends: 249 [2019-12-18 15:41:02,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-18 15:41:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 162. [2019-12-18 15:41:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 15:41:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 371 transitions. [2019-12-18 15:41:02,955 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 371 transitions. Word has length 14 [2019-12-18 15:41:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:02,956 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 371 transitions. [2019-12-18 15:41:02,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 371 transitions. [2019-12-18 15:41:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:02,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:02,956 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:03,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:03,157 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:03,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 135 times [2019-12-18 15:41:03,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:03,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754689322] [2019-12-18 15:41:03,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:03,276 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 15:41:03,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754689322] [2019-12-18 15:41:03,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755063791] [2019-12-18 15:41:03,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:03,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:41:03,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:03,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:03,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:03,939 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:41:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:03,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:03,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:03,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973833848] [2019-12-18 15:41:03,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:03,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:03,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:03,941 INFO L87 Difference]: Start difference. First operand 162 states and 371 transitions. Second operand 18 states. [2019-12-18 15:41:04,453 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-12-18 15:41:07,068 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:41:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:07,108 INFO L93 Difference]: Finished difference Result 248 states and 544 transitions. [2019-12-18 15:41:07,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:07,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:07,109 INFO L225 Difference]: With dead ends: 248 [2019-12-18 15:41:07,110 INFO L226 Difference]: Without dead ends: 247 [2019-12-18 15:41:07,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=359, Invalid=697, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-18 15:41:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 158. [2019-12-18 15:41:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 15:41:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-18 15:41:07,113 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-18 15:41:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:07,113 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-18 15:41:07,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-18 15:41:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:07,114 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:07,114 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:07,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:07,315 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 136 times [2019-12-18 15:41:07,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:07,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180675665] [2019-12-18 15:41:07,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:07,404 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 15:41:07,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180675665] [2019-12-18 15:41:07,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284505156] [2019-12-18 15:41:07,405 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:07,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:41:07,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:07,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:07,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:07,576 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 15:41:07,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:07,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:07,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009302854] [2019-12-18 15:41:07,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:07,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:07,577 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 18 states. [2019-12-18 15:41:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:08,030 INFO L93 Difference]: Finished difference Result 194 states and 423 transitions. [2019-12-18 15:41:08,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:41:08,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:08,031 INFO L225 Difference]: With dead ends: 194 [2019-12-18 15:41:08,031 INFO L226 Difference]: Without dead ends: 192 [2019-12-18 15:41:08,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-18 15:41:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2019-12-18 15:41:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:41:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 15:41:08,035 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 15:41:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:08,035 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 15:41:08,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 15:41:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:08,036 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:08,036 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:08,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:08,237 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 137 times [2019-12-18 15:41:08,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:08,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284555463] [2019-12-18 15:41:08,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:08,329 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 15:41:08,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284555463] [2019-12-18 15:41:08,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99335770] [2019-12-18 15:41:08,329 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:08,370 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:41:08,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:08,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:08,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:08,952 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_479 Int)) (and (<= c_~j~0 (+ v_~i~0_479 1)) (<= (div (+ (* v_~i~0_479 (- 1)) 1) (- 4)) 1) (<= c_~i~0 (+ v_~i~0_479 c_~j~0)))) is different from true [2019-12-18 15:41:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-12-18 15:41:09,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:09,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:09,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973241588] [2019-12-18 15:41:09,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:09,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:09,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=198, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:41:09,759 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 15:41:10,582 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-12-18 15:41:12,549 WARN L192 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:41:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:12,571 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2019-12-18 15:41:12,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:41:12,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:12,573 INFO L225 Difference]: With dead ends: 229 [2019-12-18 15:41:12,573 INFO L226 Difference]: Without dead ends: 226 [2019-12-18 15:41:12,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=319, Invalid=675, Unknown=2, NotChecked=60, Total=1056 [2019-12-18 15:41:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-18 15:41:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 156. [2019-12-18 15:41:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:41:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 362 transitions. [2019-12-18 15:41:12,576 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 362 transitions. Word has length 14 [2019-12-18 15:41:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:12,576 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 362 transitions. [2019-12-18 15:41:12,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 362 transitions. [2019-12-18 15:41:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:12,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:12,577 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:12,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:12,778 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 138 times [2019-12-18 15:41:12,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:12,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423264873] [2019-12-18 15:41:12,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:12,864 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 15:41:12,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423264873] [2019-12-18 15:41:12,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871818625] [2019-12-18 15:41:12,864 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:12,906 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:41:12,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:12,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:12,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:13,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:13,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:13,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916539146] [2019-12-18 15:41:13,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:13,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:13,038 INFO L87 Difference]: Start difference. First operand 156 states and 362 transitions. Second operand 18 states. [2019-12-18 15:41:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:13,614 INFO L93 Difference]: Finished difference Result 209 states and 453 transitions. [2019-12-18 15:41:13,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:41:13,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:13,615 INFO L225 Difference]: With dead ends: 209 [2019-12-18 15:41:13,615 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 15:41:13,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 15:41:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2019-12-18 15:41:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:41:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 15:41:13,619 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 15:41:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:13,619 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 15:41:13,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 15:41:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:13,620 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:13,620 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:13,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,821 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 139 times [2019-12-18 15:41:13,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:13,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415815512] [2019-12-18 15:41:13,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:13,910 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 15:41:13,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415815512] [2019-12-18 15:41:13,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753974538] [2019-12-18 15:41:13,910 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:13,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:13,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:14,467 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_488 Int)) (and (<= c_~i~0 (+ v_~i~0_488 c_~j~0)) (<= c_~j~0 (+ v_~i~0_488 1)) (<= (div (+ (* v_~i~0_488 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 15:41:18,663 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 15:41:18,664 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 15:41:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:18,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:18,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998238204] [2019-12-18 15:41:18,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:18,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=196, Unknown=2, NotChecked=30, Total=306 [2019-12-18 15:41:18,666 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 15:41:22,929 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 15:41:24,705 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 15:41:25,355 WARN L192 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 15:41:28,360 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:41:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:28,417 INFO L93 Difference]: Finished difference Result 223 states and 478 transitions. [2019-12-18 15:41:28,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:28,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:28,418 INFO L225 Difference]: With dead ends: 223 [2019-12-18 15:41:28,418 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:41:28,419 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=301, Invalid=630, Unknown=3, NotChecked=58, Total=992 [2019-12-18 15:41:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:41:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 156. [2019-12-18 15:41:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:41:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 15:41:28,421 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 15:41:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:28,422 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 15:41:28,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 15:41:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:28,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:28,422 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:28,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:28,624 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 140 times [2019-12-18 15:41:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:28,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089217874] [2019-12-18 15:41:28,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:28,714 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 15:41:28,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089217874] [2019-12-18 15:41:28,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960172186] [2019-12-18 15:41:28,714 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:28,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:41:28,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:28,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:28,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:29,807 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 15:41:29,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:29,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:29,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400305177] [2019-12-18 15:41:29,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:29,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:29,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:29,809 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. [2019-12-18 15:41:30,993 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 15:41:32,816 WARN L192 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 15:41:34,596 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:41:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:34,729 INFO L93 Difference]: Finished difference Result 251 states and 530 transitions. [2019-12-18 15:41:34,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:34,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:34,730 INFO L225 Difference]: With dead ends: 251 [2019-12-18 15:41:34,731 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 15:41:34,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=303, Invalid=624, Unknown=3, NotChecked=0, Total=930 [2019-12-18 15:41:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 15:41:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2019-12-18 15:41:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 15:41:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 368 transitions. [2019-12-18 15:41:34,735 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 368 transitions. Word has length 14 [2019-12-18 15:41:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:34,735 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 368 transitions. [2019-12-18 15:41:34,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 368 transitions. [2019-12-18 15:41:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:34,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:34,735 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:34,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:34,939 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 141 times [2019-12-18 15:41:34,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:34,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349076711] [2019-12-18 15:41:34,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:35,028 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 15:41:35,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349076711] [2019-12-18 15:41:35,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975368066] [2019-12-18 15:41:35,028 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:35,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:41:35,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:35,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:35,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:39,019 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 15:41:39,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:39,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:39,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452827328] [2019-12-18 15:41:39,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:39,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:39,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=221, Unknown=2, NotChecked=0, Total=306 [2019-12-18 15:41:39,020 INFO L87 Difference]: Start difference. First operand 158 states and 368 transitions. Second operand 18 states. [2019-12-18 15:41:39,546 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-18 15:41:40,196 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-18 15:41:41,009 WARN L192 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:41:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:43,559 INFO L93 Difference]: Finished difference Result 237 states and 507 transitions. [2019-12-18 15:41:43,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:43,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:43,560 INFO L225 Difference]: With dead ends: 237 [2019-12-18 15:41:43,560 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 15:41:43,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=354, Invalid=762, Unknown=6, NotChecked=0, Total=1122 [2019-12-18 15:41:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 15:41:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-18 15:41:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:41:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 15:41:43,564 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 15:41:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:43,564 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 15:41:43,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 15:41:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:43,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:43,564 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:43,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:43,765 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 142 times [2019-12-18 15:41:43,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:43,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075147441] [2019-12-18 15:41:43,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:43,862 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 15:41:43,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075147441] [2019-12-18 15:41:43,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764018143] [2019-12-18 15:41:43,863 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:43,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:41:43,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:43,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:43,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:44,458 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_502 Int)) (and (<= (div (+ (* v_~i~0_502 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~i~0_502 c_~j~0)) (<= c_~j~0 (+ (* 2 v_~i~0_502) 1)))) is different from true [2019-12-18 15:41:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-18 15:41:44,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:44,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:44,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801453620] [2019-12-18 15:41:44,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:44,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:44,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=196, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:41:44,876 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. [2019-12-18 15:41:45,394 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2019-12-18 15:41:45,928 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2019-12-18 15:41:46,383 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 15:41:46,771 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 15:41:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:50,255 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2019-12-18 15:41:50,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:50,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:50,256 INFO L225 Difference]: With dead ends: 241 [2019-12-18 15:41:50,256 INFO L226 Difference]: Without dead ends: 239 [2019-12-18 15:41:50,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=4, NotChecked=64, Total=1190 [2019-12-18 15:41:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-18 15:41:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 154. [2019-12-18 15:41:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:41:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-18 15:41:50,260 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-18 15:41:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:50,261 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-18 15:41:50,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-18 15:41:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:50,261 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:50,261 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:50,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:50,462 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 143 times [2019-12-18 15:41:50,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:50,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106911278] [2019-12-18 15:41:50,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:50,624 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 15:41:50,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106911278] [2019-12-18 15:41:50,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189156233] [2019-12-18 15:41:50,625 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:50,689 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:41:50,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:50,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:50,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:53,070 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 15:41:53,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:53,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:53,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25707941] [2019-12-18 15:41:53,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:53,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:53,071 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 18 states. [2019-12-18 15:41:58,261 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 15:42:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:42:00,478 INFO L93 Difference]: Finished difference Result 222 states and 475 transitions. [2019-12-18 15:42:00,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:42:00,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:42:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:42:00,479 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:42:00,479 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 15:42:00,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=335, Invalid=786, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 15:42:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 15:42:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 15:42:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:42:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 15:42:00,483 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 15:42:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:42:00,483 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 15:42:00,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:42:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 15:42:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:42:00,484 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:42:00,484 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:42:00,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:00,685 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:42:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:42:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 144 times [2019-12-18 15:42:00,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:42:00,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62544496] [2019-12-18 15:42:00,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:42:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:42:00,817 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 15:42:00,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62544496] [2019-12-18 15:42:00,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637093152] [2019-12-18 15:42:00,817 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:00,869 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:42:00,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:42:00,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:42:00,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:42:03,965 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 15:42:03,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:42:03,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:42:03,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876429543] [2019-12-18 15:42:03,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:42:03,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:42:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:42:03,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=220, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:42:03,967 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. [2019-12-18 15:42:05,292 WARN L192 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2019-12-18 15:42:06,996 WARN L192 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-12-18 15:42:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:42:10,968 INFO L93 Difference]: Finished difference Result 231 states and 490 transitions. [2019-12-18 15:42:10,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:42:10,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:42:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:42:10,969 INFO L225 Difference]: With dead ends: 231 [2019-12-18 15:42:10,969 INFO L226 Difference]: Without dead ends: 228 [2019-12-18 15:42:10,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=354, Invalid=764, Unknown=4, NotChecked=0, Total=1122 [2019-12-18 15:42:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-18 15:42:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 156. [2019-12-18 15:42:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:42:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 361 transitions. [2019-12-18 15:42:10,973 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 361 transitions. Word has length 14 [2019-12-18 15:42:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:42:10,974 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 361 transitions. [2019-12-18 15:42:10,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:42:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 361 transitions. [2019-12-18 15:42:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:42:10,974 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:42:10,975 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:42:11,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:11,175 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:42:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:42:11,176 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 145 times [2019-12-18 15:42:11,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:42:11,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777583097] [2019-12-18 15:42:11,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:42:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:42:11,279 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 15:42:11,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777583097] [2019-12-18 15:42:11,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151839489] [2019-12-18 15:42:11,280 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:42:11,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:42:11,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:42:11,874 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 15:42:11,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:42:11,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:42:11,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401295559] [2019-12-18 15:42:11,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:42:11,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:42:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:42:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:42:11,876 INFO L87 Difference]: Start difference. First operand 156 states and 361 transitions. Second operand 18 states. Received shutdown request... [2019-12-18 15:42:12,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:42:12,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:12,606 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 15:42:12,611 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 15:42:12,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 03:42:12 BasicIcfg [2019-12-18 15:42:12,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 15:42:12,612 INFO L168 Benchmark]: Toolchain (without parser) took 288702.57 ms. Allocated memory was 137.9 MB in the beginning and 192.4 MB in the end (delta: 54.5 MB). Free memory was 101.5 MB in the beginning and 81.6 MB in the end (delta: 20.0 MB). Peak memory consumption was 74.5 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,612 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.34 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 160.9 MB in the end (delta: -59.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.47 ms. Allocated memory is still 201.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,613 INFO L168 Benchmark]: Boogie Preprocessor took 27.11 ms. Allocated memory is still 201.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,614 INFO L168 Benchmark]: RCFGBuilder took 447.19 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 138.1 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,614 INFO L168 Benchmark]: TraceAbstraction took 287525.45 ms. Allocated memory was 201.9 MB in the beginning and 192.4 MB in the end (delta: -9.4 MB). Free memory was 137.5 MB in the beginning and 81.6 MB in the end (delta: 55.9 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:12,616 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 654.34 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 160.9 MB in the end (delta: -59.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.47 ms. Allocated memory is still 201.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.11 ms. Allocated memory is still 201.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 447.19 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 138.1 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287525.45 ms. Allocated memory was 201.9 MB in the beginning and 192.4 MB in the end (delta: -9.4 MB). Free memory was 137.5 MB in the beginning and 81.6 MB in the end (delta: 55.9 MB). Peak memory consumption was 46.5 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, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (156states) and FLOYD_HOARE automaton (currently 6 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 287.4s, OverallIterations: 159, TraceHistogramMax: 7, AutomataDifference: 176.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 19889 SDslu, 12224 SDs, 0 SdLazy, 6998 SolverSat, 3964 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 43.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4342 GetRequests, 762 SyntacticMatches, 25 SemanticMatches, 3554 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 20583 ImplicationChecksByTransitivity, 195.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred in iteration=139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 158 MinimizatonAttempts, 7418 StatesRemovedByMinimization, 155 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 68.9s InterpolantComputationTime, 3947 NumberOfCodeBlocks, 3947 NumberOfCodeBlocksAsserted, 511 NumberOfCheckSat, 3634 ConstructedInterpolants, 163 QuantifiedInterpolants, 424937 SizeOfPredicates, 0 NumberOfNonLiveVariables, 14230 ConjunctsInSsa, 1656 ConjunctsInUnsatCore, 313 InterpolantComputations, 7 PerfectInterpolantSequences, 36/2192 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