/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:45:19,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:45:19,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:45:19,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:45:19,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:45:19,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:45:19,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:45:19,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:45:19,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:45:19,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:45:19,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:45:19,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:45:19,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:45:19,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:45:19,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:45:19,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:45:19,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:45:19,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:45:19,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:45:19,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:45:19,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:45:19,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:45:19,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:45:19,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:45:19,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-26 20:45:19,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:45:19,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:45:19,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:45:19,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:45:19,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:45:19,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:45:19,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:45:19,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:45:19,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:45:19,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:45:19,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:45:19,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-26 20:45:19,236 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:45:19,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:45:19,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:45:19,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:45:19,239 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:45:19,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:45:19,240 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:45:19,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:45:19,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:45:19,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:45:19,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:45:19,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:45:19,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:45:19,241 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:45:19,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:45:19,242 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:45:19,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:45:19,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:45:19,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:45:19,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:45:19,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:45:19,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:45:19,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:45:19,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:45:19,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:45:19,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:45:19,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:45:19,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:45:19,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:45:19,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:45:19,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:45:19,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:45:19,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:45:19,561 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:45:19,561 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:45:19,562 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-26 20:45:19,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4539c9c0f/a465416219c94650885f1d0291a028c5/FLAG53db83f52 [2019-12-26 20:45:20,215 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:45:20,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-26 20:45:20,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4539c9c0f/a465416219c94650885f1d0291a028c5/FLAG53db83f52 [2019-12-26 20:45:20,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4539c9c0f/a465416219c94650885f1d0291a028c5 [2019-12-26 20:45:20,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:45:20,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:45:20,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:20,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:45:20,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:45:20,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba8ee51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20, skipping insertion in model container [2019-12-26 20:45:20,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:45:20,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:45:20,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:20,989 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:45:21,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:21,131 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:45:21,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21 WrapperNode [2019-12-26 20:45:21,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:21,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:21,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:45:21,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:45:21,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:21,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:45:21,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:45:21,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:45:21,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (1/1) ... [2019-12-26 20:45:21,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:45:21,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:45:21,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:45:21,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:45:21,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (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 [2019-12-26 20:45:21,268 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:45:21,269 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:45:21,269 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:45:21,269 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:45:21,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:45:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:45:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:45:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:45:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:45:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:45:21,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:45:21,273 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:45:21,644 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:45:21,645 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:45:21,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21 BoogieIcfgContainer [2019-12-26 20:45:21,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:45:21,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:45:21,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:45:21,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:45:21,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:45:20" (1/3) ... [2019-12-26 20:45:21,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546ef92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:21" (2/3) ... [2019-12-26 20:45:21,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546ef92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21" (3/3) ... [2019-12-26 20:45:21,655 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2019-12-26 20:45:21,664 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:45:21,664 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:45:21,672 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:45:21,673 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:45:21,698 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,698 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,698 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,700 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,701 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,702 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,702 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,702 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,702 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,704 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,704 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,704 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,704 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,705 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,710 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,710 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,710 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,711 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,711 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,711 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,718 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,718 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,718 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,719 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,719 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,719 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,742 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:45:21,758 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:45:21,758 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:45:21,758 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:45:21,758 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:45:21,759 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:45:21,759 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:45:21,759 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:45:21,759 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:45:21,771 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-26 20:45:21,773 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,828 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,828 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,834 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-26 20:45:21,838 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,864 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,864 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,865 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-26 20:45:21,867 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-26 20:45:21,869 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:45:23,097 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-26 20:45:23,231 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-26 20:45:23,231 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-26 20:45:23,235 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:45:23,245 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:45:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:45:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:45:23,254 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,255 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:45:23,256 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-26 20:45:23,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722536302] [2019-12-26 20:45:23,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722536302] [2019-12-26 20:45:23,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:45:23,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525557856] [2019-12-26 20:45:23,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:45:23,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:45:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:23,526 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:45:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,596 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-26 20:45:23,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:45:23,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:45:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,626 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:23,626 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:45:23,628 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 [2019-12-26 20:45:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:45:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:45:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:45:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-26 20:45:23,676 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-26 20:45:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,677 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-26 20:45:23,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:45:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-26 20:45:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,681 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,682 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,689 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-26 20:45:23,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928093178] [2019-12-26 20:45:23,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928093178] [2019-12-26 20:45:23,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759497590] [2019-12-26 20:45:23,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,834 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-26 20:45:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,869 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-26 20:45:23,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,871 INFO L225 Difference]: With dead ends: 46 [2019-12-26 20:45:23,871 INFO L226 Difference]: Without dead ends: 45 [2019-12-26 20:45:23,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-26 20:45:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-26 20:45:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-26 20:45:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-26 20:45:23,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-26 20:45:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,879 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-26 20:45:23,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-26 20:45:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,881 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,881 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-26 20:45:23,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411245499] [2019-12-26 20:45:23,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411245499] [2019-12-26 20:45:23,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787894223] [2019-12-26 20:45:23,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,965 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-26 20:45:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,996 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-26 20:45:23,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,998 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:45:23,998 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:45:23,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:45:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-26 20:45:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-26 20:45:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-26 20:45:24,014 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-26 20:45:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,014 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-26 20:45:24,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-26 20:45:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:24,015 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,015 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,015 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-26 20:45:24,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793165150] [2019-12-26 20:45:24,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793165150] [2019-12-26 20:45:24,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764207211] [2019-12-26 20:45:24,135 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 [2019-12-26 20:45:24,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:24,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:24,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698530315] [2019-12-26 20:45:24,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:24,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:24,268 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-26 20:45:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,330 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-26 20:45:24,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:24,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,333 INFO L225 Difference]: With dead ends: 60 [2019-12-26 20:45:24,333 INFO L226 Difference]: Without dead ends: 59 [2019-12-26 20:45:24,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-26 20:45:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-26 20:45:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:45:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-26 20:45:24,341 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-26 20:45:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,341 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-26 20:45:24,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-26 20:45:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:24,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,343 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:24,547 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-26 20:45:24,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819479612] [2019-12-26 20:45:24,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819479612] [2019-12-26 20:45:24,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290996541] [2019-12-26 20:45:24,640 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 [2019-12-26 20:45:24,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:24,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:24,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861099549] [2019-12-26 20:45:24,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:24,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:24,764 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 8 states. [2019-12-26 20:45:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,828 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-26 20:45:24,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:24,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,832 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:45:24,832 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:45:24,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:45:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-26 20:45:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:45:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-26 20:45:24,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-26 20:45:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,847 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-26 20:45:24,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-26 20:45:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:24,848 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,848 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:25,051 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-26 20:45:25,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436059810] [2019-12-26 20:45:25,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436059810] [2019-12-26 20:45:25,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542212852] [2019-12-26 20:45:25,149 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 [2019-12-26 20:45:25,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:25,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:25,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:25,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:25,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:25,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583232107] [2019-12-26 20:45:25,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:25,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:25,256 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-26 20:45:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,336 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-26 20:45:25,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:25,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,338 INFO L225 Difference]: With dead ends: 72 [2019-12-26 20:45:25,338 INFO L226 Difference]: Without dead ends: 71 [2019-12-26 20:45:25,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-26 20:45:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-26 20:45:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:45:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-26 20:45:25,345 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-26 20:45:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,346 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-26 20:45:25,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-26 20:45:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,347 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,347 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:25,551 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-26 20:45:25,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171991074] [2019-12-26 20:45:25,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171991074] [2019-12-26 20:45:25,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960120706] [2019-12-26 20:45:25,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,627 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-26 20:45:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,682 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-26 20:45:25,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,684 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:45:25,684 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:45:25,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:45:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:45:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-26 20:45:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-26 20:45:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-26 20:45:25,704 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-26 20:45:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,705 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-26 20:45:25,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-26 20:45:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,706 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,706 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,706 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-26 20:45:25,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46012956] [2019-12-26 20:45:25,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46012956] [2019-12-26 20:45:25,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718273507] [2019-12-26 20:45:25,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,750 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-26 20:45:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,792 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-26 20:45:25,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,798 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:45:25,798 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:45:25,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:45:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:45:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-26 20:45:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-26 20:45:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-26 20:45:25,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-26 20:45:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,804 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-26 20:45:25,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-26 20:45:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,805 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,806 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-26 20:45:25,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132498628] [2019-12-26 20:45:25,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132498628] [2019-12-26 20:45:25,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269096816] [2019-12-26 20:45:25,858 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 [2019-12-26 20:45:25,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:25,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:25,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:25,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:25,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:25,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420478500] [2019-12-26 20:45:25,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:25,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:25,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:25,970 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 10 states. [2019-12-26 20:45:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,047 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-26 20:45:26,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:26,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,049 INFO L225 Difference]: With dead ends: 75 [2019-12-26 20:45:26,049 INFO L226 Difference]: Without dead ends: 74 [2019-12-26 20:45:26,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-26 20:45:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-26 20:45:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-26 20:45:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-26 20:45:26,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-26 20:45:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,055 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-26 20:45:26,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-26 20:45:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,057 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,258 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-26 20:45:26,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989082116] [2019-12-26 20:45:26,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989082116] [2019-12-26 20:45:26,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348958073] [2019-12-26 20:45:26,348 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 [2019-12-26 20:45:26,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:26,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:26,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657404081] [2019-12-26 20:45:26,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:26,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:26,467 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-26 20:45:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,594 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-26 20:45:26,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:26,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,597 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:45:26,597 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:45:26,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:45:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-26 20:45:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-26 20:45:26,610 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-26 20:45:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,610 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-26 20:45:26,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-26 20:45:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,617 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,820 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-26 20:45:26,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185317009] [2019-12-26 20:45:26,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185317009] [2019-12-26 20:45:26,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204188101] [2019-12-26 20:45:26,885 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 [2019-12-26 20:45:26,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:26,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:26,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609994356] [2019-12-26 20:45:26,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:26,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,004 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-26 20:45:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,108 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-26 20:45:27,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:27,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,109 INFO L225 Difference]: With dead ends: 87 [2019-12-26 20:45:27,110 INFO L226 Difference]: Without dead ends: 86 [2019-12-26 20:45:27,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-26 20:45:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-26 20:45:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-26 20:45:27,123 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-26 20:45:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,123 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-26 20:45:27,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-26 20:45:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,124 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,338 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-26 20:45:27,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275956330] [2019-12-26 20:45:27,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275956330] [2019-12-26 20:45:27,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429526383] [2019-12-26 20:45:27,413 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 [2019-12-26 20:45:27,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:27,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:27,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:27,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740830550] [2019-12-26 20:45:27,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:27,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,520 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-26 20:45:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,621 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-26 20:45:27,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:27,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,623 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:27,623 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:27,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:45:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-12-26 20:45:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-26 20:45:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-26 20:45:27,628 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-26 20:45:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,628 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-26 20:45:27,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-26 20:45:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,629 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,629 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,838 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-26 20:45:27,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701876567] [2019-12-26 20:45:27,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701876567] [2019-12-26 20:45:27,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351325771] [2019-12-26 20:45:27,930 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 [2019-12-26 20:45:27,976 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:27,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986598088] [2019-12-26 20:45:28,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,032 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 10 states. [2019-12-26 20:45:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,133 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2019-12-26 20:45:28,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:28,134 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,136 INFO L225 Difference]: With dead ends: 98 [2019-12-26 20:45:28,136 INFO L226 Difference]: Without dead ends: 96 [2019-12-26 20:45:28,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-26 20:45:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2019-12-26 20:45:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:45:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-26 20:45:28,141 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-26 20:45:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,141 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-26 20:45:28,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-26 20:45:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,142 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,345 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 6 times [2019-12-26 20:45:28,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806073966] [2019-12-26 20:45:28,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806073966] [2019-12-26 20:45:28,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161846470] [2019-12-26 20:45:28,410 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 [2019-12-26 20:45:28,459 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:28,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:28,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566394645] [2019-12-26 20:45:28,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,514 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 10 states. [2019-12-26 20:45:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,610 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-26 20:45:28,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:28,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,612 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:28,612 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:28,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2019-12-26 20:45:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:45:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-26 20:45:28,616 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-26 20:45:28,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,616 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-26 20:45:28,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-26 20:45:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,617 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,821 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-26 20:45:28,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454980856] [2019-12-26 20:45:28,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454980856] [2019-12-26 20:45:28,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632609374] [2019-12-26 20:45:28,882 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:28,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:28,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:29,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264476019] [2019-12-26 20:45:29,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:29,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:29,024 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 12 states. [2019-12-26 20:45:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,132 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-26 20:45:29,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:29,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,135 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:29,135 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:29,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-26 20:45:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:45:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-26 20:45:29,140 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-26 20:45:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,140 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-26 20:45:29,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-26 20:45:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:29,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,141 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:29,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,346 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-26 20:45:29,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:29,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431789859] [2019-12-26 20:45:29,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431789859] [2019-12-26 20:45:29,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273444933] [2019-12-26 20:45:29,464 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:29,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:29,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:29,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:29,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677259136] [2019-12-26 20:45:29,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:29,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:29,606 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-26 20:45:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,729 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-26 20:45:29,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:29,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,731 INFO L225 Difference]: With dead ends: 101 [2019-12-26 20:45:29,731 INFO L226 Difference]: Without dead ends: 100 [2019-12-26 20:45:29,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-26 20:45:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-26 20:45:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-26 20:45:29,735 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-26 20:45:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,735 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-26 20:45:29,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-26 20:45:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:29,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,736 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:29,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,939 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 7 times [2019-12-26 20:45:29,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:29,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417498233] [2019-12-26 20:45:29,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417498233] [2019-12-26 20:45:30,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064958008] [2019-12-26 20:45:30,011 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:30,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188109677] [2019-12-26 20:45:30,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:30,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:30,135 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-26 20:45:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,275 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2019-12-26 20:45:30,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:30,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,277 INFO L225 Difference]: With dead ends: 108 [2019-12-26 20:45:30,277 INFO L226 Difference]: Without dead ends: 107 [2019-12-26 20:45:30,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-26 20:45:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-26 20:45:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-26 20:45:30,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-26 20:45:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,283 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-26 20:45:30,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-26 20:45:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,284 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,487 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 8 times [2019-12-26 20:45:30,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894354993] [2019-12-26 20:45:30,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894354993] [2019-12-26 20:45:30,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101233506] [2019-12-26 20:45:30,561 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:30,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:30,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:30,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405449881] [2019-12-26 20:45:30,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:30,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:30,769 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-26 20:45:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,957 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2019-12-26 20:45:30,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:30,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,960 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:30,960 INFO L226 Difference]: Without dead ends: 110 [2019-12-26 20:45:30,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-26 20:45:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2019-12-26 20:45:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-26 20:45:30,968 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-26 20:45:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,969 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-26 20:45:30,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-26 20:45:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,970 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,970 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,176 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 9 times [2019-12-26 20:45:31,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642728960] [2019-12-26 20:45:31,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642728960] [2019-12-26 20:45:31,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244505500] [2019-12-26 20:45:31,278 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 [2019-12-26 20:45:31,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:31,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:31,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418289436] [2019-12-26 20:45:31,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:31,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:31,544 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-26 20:45:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,812 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-26 20:45:31,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:31,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,815 INFO L225 Difference]: With dead ends: 113 [2019-12-26 20:45:31,815 INFO L226 Difference]: Without dead ends: 112 [2019-12-26 20:45:31,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-26 20:45:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2019-12-26 20:45:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-26 20:45:31,821 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-26 20:45:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,821 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-26 20:45:31,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-26 20:45:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:31,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,823 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,023 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 10 times [2019-12-26 20:45:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265563743] [2019-12-26 20:45:32,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265563743] [2019-12-26 20:45:32,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928123876] [2019-12-26 20:45:32,086 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 [2019-12-26 20:45:32,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:32,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361099329] [2019-12-26 20:45:32,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,242 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-26 20:45:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,419 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2019-12-26 20:45:32,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:32,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,427 INFO L225 Difference]: With dead ends: 119 [2019-12-26 20:45:32,427 INFO L226 Difference]: Without dead ends: 117 [2019-12-26 20:45:32,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-26 20:45:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2019-12-26 20:45:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-26 20:45:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-26 20:45:32,432 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-26 20:45:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,433 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-26 20:45:32,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-26 20:45:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,433 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,636 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 11 times [2019-12-26 20:45:32,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458732260] [2019-12-26 20:45:32,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458732260] [2019-12-26 20:45:32,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246034988] [2019-12-26 20:45:32,706 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 [2019-12-26 20:45:32,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:32,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751086035] [2019-12-26 20:45:32,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,825 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,958 INFO L93 Difference]: Finished difference Result 123 states and 256 transitions. [2019-12-26 20:45:32,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:32,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,959 INFO L225 Difference]: With dead ends: 123 [2019-12-26 20:45:32,959 INFO L226 Difference]: Without dead ends: 121 [2019-12-26 20:45:32,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-26 20:45:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2019-12-26 20:45:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-26 20:45:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-26 20:45:32,963 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-26 20:45:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,963 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-26 20:45:32,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-26 20:45:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,964 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,964 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,168 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 12 times [2019-12-26 20:45:33,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886272746] [2019-12-26 20:45:33,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886272746] [2019-12-26 20:45:33,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48414552] [2019-12-26 20:45:33,224 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 [2019-12-26 20:45:33,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:33,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527829167] [2019-12-26 20:45:33,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,345 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 12 states. [2019-12-26 20:45:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,528 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2019-12-26 20:45:33,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:33,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,530 INFO L225 Difference]: With dead ends: 121 [2019-12-26 20:45:33,531 INFO L226 Difference]: Without dead ends: 119 [2019-12-26 20:45:33,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-26 20:45:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2019-12-26 20:45:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-26 20:45:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 200 transitions. [2019-12-26 20:45:33,537 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 200 transitions. Word has length 11 [2019-12-26 20:45:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,537 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 200 transitions. [2019-12-26 20:45:33,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 200 transitions. [2019-12-26 20:45:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:33,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,539 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,742 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 13 times [2019-12-26 20:45:33,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700632594] [2019-12-26 20:45:33,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700632594] [2019-12-26 20:45:33,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428827985] [2019-12-26 20:45:33,822 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 [2019-12-26 20:45:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152380379] [2019-12-26 20:45:33,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,986 INFO L87 Difference]: Start difference. First operand 90 states and 200 transitions. Second operand 12 states. [2019-12-26 20:45:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,178 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-26 20:45:34,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:34,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,180 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:34,180 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:34,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-26 20:45:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-26 20:45:34,185 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-26 20:45:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,186 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-26 20:45:34,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-26 20:45:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,187 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,396 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-26 20:45:34,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581842808] [2019-12-26 20:45:34,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581842808] [2019-12-26 20:45:34,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105632448] [2019-12-26 20:45:34,478 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:34,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:34,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787899171] [2019-12-26 20:45:34,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:34,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:34,625 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 14 states. [2019-12-26 20:45:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,751 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-26 20:45:34,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:34,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,753 INFO L225 Difference]: With dead ends: 105 [2019-12-26 20:45:34,753 INFO L226 Difference]: Without dead ends: 104 [2019-12-26 20:45:34,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-26 20:45:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-26 20:45:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-26 20:45:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-26 20:45:34,758 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-26 20:45:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,758 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-26 20:45:34,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-26 20:45:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:34,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,759 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,962 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-26 20:45:34,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985157351] [2019-12-26 20:45:34,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985157351] [2019-12-26 20:45:35,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705164279] [2019-12-26 20:45:35,064 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 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 [2019-12-26 20:45:35,116 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:35,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:35,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561300494] [2019-12-26 20:45:35,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:35,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:35,237 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-26 20:45:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,405 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-26 20:45:35,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:35,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:45:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,407 INFO L225 Difference]: With dead ends: 116 [2019-12-26 20:45:35,407 INFO L226 Difference]: Without dead ends: 115 [2019-12-26 20:45:35,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-26 20:45:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-26 20:45:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:35,411 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,411 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:35,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:35,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,412 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,615 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 14 times [2019-12-26 20:45:35,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843339267] [2019-12-26 20:45:35,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843339267] [2019-12-26 20:45:35,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446001764] [2019-12-26 20:45:35,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:35,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:35,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802261677] [2019-12-26 20:45:35,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:35,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:35,913 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,148 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-26 20:45:36,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:36,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,149 INFO L225 Difference]: With dead ends: 125 [2019-12-26 20:45:36,149 INFO L226 Difference]: Without dead ends: 124 [2019-12-26 20:45:36,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-26 20:45:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-26 20:45:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:36,153 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,153 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:36,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:36,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,154 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,354 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 15 times [2019-12-26 20:45:36,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839969828] [2019-12-26 20:45:36,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839969828] [2019-12-26 20:45:36,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531003715] [2019-12-26 20:45:36,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:36,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:36,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:36,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199901030] [2019-12-26 20:45:36,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:36,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:36,654 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,945 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2019-12-26 20:45:36,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:36,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,948 INFO L225 Difference]: With dead ends: 134 [2019-12-26 20:45:36,948 INFO L226 Difference]: Without dead ends: 133 [2019-12-26 20:45:36,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-26 20:45:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2019-12-26 20:45:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:36,954 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,956 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:36,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:36,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,957 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,158 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 16 times [2019-12-26 20:45:37,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007425551] [2019-12-26 20:45:37,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007425551] [2019-12-26 20:45:37,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519993113] [2019-12-26 20:45:37,245 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:37,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:38,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961536200] [2019-12-26 20:45:38,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:38,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2019-12-26 20:45:38,366 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,687 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-26 20:45:38,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:38,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,689 INFO L225 Difference]: With dead ends: 140 [2019-12-26 20:45:38,689 INFO L226 Difference]: Without dead ends: 139 [2019-12-26 20:45:38,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=316, Unknown=1, NotChecked=0, Total=462 [2019-12-26 20:45:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-26 20:45:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2019-12-26 20:45:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:38,694 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,694 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:38,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:38,695 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,695 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,896 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 17 times [2019-12-26 20:45:38,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413777710] [2019-12-26 20:45:38,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413777710] [2019-12-26 20:45:38,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297979130] [2019-12-26 20:45:38,977 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,024 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:39,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:39,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246674238] [2019-12-26 20:45:39,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:39,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:39,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:39,150 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,395 INFO L93 Difference]: Finished difference Result 133 states and 280 transitions. [2019-12-26 20:45:39,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:39,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,397 INFO L225 Difference]: With dead ends: 133 [2019-12-26 20:45:39,398 INFO L226 Difference]: Without dead ends: 131 [2019-12-26 20:45:39,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-26 20:45:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-26 20:45:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-26 20:45:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-26 20:45:39,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-26 20:45:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,403 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-26 20:45:39,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-26 20:45:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:39,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,404 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,607 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 18 times [2019-12-26 20:45:39,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570716019] [2019-12-26 20:45:39,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570716019] [2019-12-26 20:45:39,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744182543] [2019-12-26 20:45:39,681 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,727 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:39,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:39,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28575393] [2019-12-26 20:45:39,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:39,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:39,863 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,165 INFO L93 Difference]: Finished difference Result 148 states and 313 transitions. [2019-12-26 20:45:40,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:40,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,167 INFO L225 Difference]: With dead ends: 148 [2019-12-26 20:45:40,168 INFO L226 Difference]: Without dead ends: 146 [2019-12-26 20:45:40,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-26 20:45:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-12-26 20:45:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:40,172 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,173 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:40,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:40,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,174 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,376 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,377 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 19 times [2019-12-26 20:45:40,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316366821] [2019-12-26 20:45:40,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:40,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316366821] [2019-12-26 20:45:40,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782190760] [2019-12-26 20:45:40,455 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:40,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:40,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:40,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427006869] [2019-12-26 20:45:40,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:40,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:40,624 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,907 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2019-12-26 20:45:40,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:40,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,911 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:40,911 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:40,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2019-12-26 20:45:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2019-12-26 20:45:40,915 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 12 [2019-12-26 20:45:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,916 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2019-12-26 20:45:40,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2019-12-26 20:45:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:40,917 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,917 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:41,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:41,120 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 20 times [2019-12-26 20:45:41,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:41,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337596948] [2019-12-26 20:45:41,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:41,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337596948] [2019-12-26 20:45:41,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941573201] [2019-12-26 20:45:41,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:41,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:41,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:41,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:41,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:41,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:41,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:41,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062285085] [2019-12-26 20:45:41,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:41,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:41,387 INFO L87 Difference]: Start difference. First operand 104 states and 237 transitions. Second operand 14 states. [2019-12-26 20:45:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:41,717 INFO L93 Difference]: Finished difference Result 139 states and 294 transitions. [2019-12-26 20:45:41,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:41,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:41,719 INFO L225 Difference]: With dead ends: 139 [2019-12-26 20:45:41,720 INFO L226 Difference]: Without dead ends: 138 [2019-12-26 20:45:41,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-26 20:45:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2019-12-26 20:45:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:41,724 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:41,724 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:41,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:41,725 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:41,725 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:41,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:41,928 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 21 times [2019-12-26 20:45:41,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:41,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930246835] [2019-12-26 20:45:41,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930246835] [2019-12-26 20:45:42,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435511744] [2019-12-26 20:45:42,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:42,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:42,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:43,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:43,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280598244] [2019-12-26 20:45:43,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:43,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=131, Unknown=2, NotChecked=0, Total=182 [2019-12-26 20:45:43,317 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:43,801 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-26 20:45:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:44,075 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2019-12-26 20:45:44,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:44,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:44,078 INFO L225 Difference]: With dead ends: 152 [2019-12-26 20:45:44,078 INFO L226 Difference]: Without dead ends: 150 [2019-12-26 20:45:44,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=156, Invalid=348, Unknown=2, NotChecked=0, Total=506 [2019-12-26 20:45:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-26 20:45:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2019-12-26 20:45:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:44,082 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:44,083 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:44,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:44,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:44,084 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,287 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 22 times [2019-12-26 20:45:44,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647205039] [2019-12-26 20:45:44,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647205039] [2019-12-26 20:45:44,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990856960] [2019-12-26 20:45:44,374 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 [2019-12-26 20:45:44,417 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:44,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:44,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:44,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55923466] [2019-12-26 20:45:44,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:44,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:44,517 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:44,853 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-26 20:45:44,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:44,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:44,855 INFO L225 Difference]: With dead ends: 146 [2019-12-26 20:45:44,855 INFO L226 Difference]: Without dead ends: 144 [2019-12-26 20:45:44,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-26 20:45:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2019-12-26 20:45:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-26 20:45:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 228 transitions. [2019-12-26 20:45:44,859 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 228 transitions. Word has length 12 [2019-12-26 20:45:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:44,860 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 228 transitions. [2019-12-26 20:45:44,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 228 transitions. [2019-12-26 20:45:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:44,860 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:44,861 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:45,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:45,065 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 23 times [2019-12-26 20:45:45,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:45,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616843624] [2019-12-26 20:45:45,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616843624] [2019-12-26 20:45:45,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152605062] [2019-12-26 20:45:45,128 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 [2019-12-26 20:45:45,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:45,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559083077] [2019-12-26 20:45:45,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,260 INFO L87 Difference]: Start difference. First operand 101 states and 228 transitions. Second operand 14 states. [2019-12-26 20:45:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:45,514 INFO L93 Difference]: Finished difference Result 158 states and 329 transitions. [2019-12-26 20:45:45,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:45:45,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:45,517 INFO L225 Difference]: With dead ends: 158 [2019-12-26 20:45:45,517 INFO L226 Difference]: Without dead ends: 156 [2019-12-26 20:45:45,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-26 20:45:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2019-12-26 20:45:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-26 20:45:45,522 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-26 20:45:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:45,522 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-26 20:45:45,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-26 20:45:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:45,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:45,523 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:45,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:45,726 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 24 times [2019-12-26 20:45:45,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:45,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359098503] [2019-12-26 20:45:45,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359098503] [2019-12-26 20:45:45,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143739970] [2019-12-26 20:45:45,824 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 [2019-12-26 20:45:45,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:45,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853893802] [2019-12-26 20:45:45,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,947 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-26 20:45:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,177 INFO L93 Difference]: Finished difference Result 154 states and 328 transitions. [2019-12-26 20:45:46,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:46,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,179 INFO L225 Difference]: With dead ends: 154 [2019-12-26 20:45:46,179 INFO L226 Difference]: Without dead ends: 152 [2019-12-26 20:45:46,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-26 20:45:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2019-12-26 20:45:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-26 20:45:46,184 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-26 20:45:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,184 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-26 20:45:46,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-26 20:45:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,185 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,185 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,388 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 25 times [2019-12-26 20:45:46,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107134521] [2019-12-26 20:45:46,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107134521] [2019-12-26 20:45:46,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921673093] [2019-12-26 20:45:46,477 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 [2019-12-26 20:45:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:46,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99969776] [2019-12-26 20:45:46,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:46,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:46,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:46,611 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-26 20:45:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,895 INFO L93 Difference]: Finished difference Result 150 states and 318 transitions. [2019-12-26 20:45:46,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:46,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,897 INFO L225 Difference]: With dead ends: 150 [2019-12-26 20:45:46,897 INFO L226 Difference]: Without dead ends: 148 [2019-12-26 20:45:46,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-26 20:45:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2019-12-26 20:45:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 240 transitions. [2019-12-26 20:45:46,900 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 240 transitions. Word has length 12 [2019-12-26 20:45:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,901 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 240 transitions. [2019-12-26 20:45:46,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 240 transitions. [2019-12-26 20:45:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,901 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,104 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 26 times [2019-12-26 20:45:47,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775294861] [2019-12-26 20:45:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775294861] [2019-12-26 20:45:47,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127174674] [2019-12-26 20:45:47,181 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 [2019-12-26 20:45:47,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:47,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:47,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237109131] [2019-12-26 20:45:47,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:47,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:47,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:47,319 INFO L87 Difference]: Start difference. First operand 104 states and 240 transitions. Second operand 14 states. [2019-12-26 20:45:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,570 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-26 20:45:47,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:47,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,572 INFO L225 Difference]: With dead ends: 133 [2019-12-26 20:45:47,572 INFO L226 Difference]: Without dead ends: 132 [2019-12-26 20:45:47,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-26 20:45:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2019-12-26 20:45:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:47,576 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,576 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:47,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,577 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,780 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 27 times [2019-12-26 20:45:47,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725929895] [2019-12-26 20:45:47,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725929895] [2019-12-26 20:45:47,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754574447] [2019-12-26 20:45:47,858 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 [2019-12-26 20:45:47,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:47,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:48,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:48,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325797211] [2019-12-26 20:45:48,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:48,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:48,016 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:48,233 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-26 20:45:48,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:48,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:48,235 INFO L225 Difference]: With dead ends: 140 [2019-12-26 20:45:48,235 INFO L226 Difference]: Without dead ends: 139 [2019-12-26 20:45:48,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-26 20:45:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2019-12-26 20:45:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-26 20:45:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-26 20:45:48,239 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-26 20:45:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:48,239 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-26 20:45:48,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-26 20:45:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:48,240 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:48,240 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:48,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:48,443 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 28 times [2019-12-26 20:45:48,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:48,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341689057] [2019-12-26 20:45:48,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341689057] [2019-12-26 20:45:48,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479114083] [2019-12-26 20:45:48,515 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 [2019-12-26 20:45:48,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:48,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:48,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:48,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:48,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:48,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402139651] [2019-12-26 20:45:48,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:48,638 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 14 states. [2019-12-26 20:45:48,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:48,850 INFO L93 Difference]: Finished difference Result 125 states and 256 transitions. [2019-12-26 20:45:48,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:48,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:48,852 INFO L225 Difference]: With dead ends: 125 [2019-12-26 20:45:48,852 INFO L226 Difference]: Without dead ends: 124 [2019-12-26 20:45:48,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-26 20:45:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2019-12-26 20:45:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-26 20:45:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-26 20:45:48,856 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-26 20:45:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:48,856 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-26 20:45:48,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-26 20:45:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:48,857 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:48,857 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,058 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-26 20:45:49,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676972244] [2019-12-26 20:45:49,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676972244] [2019-12-26 20:45:49,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418303064] [2019-12-26 20:45:49,135 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:49,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:49,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346849066] [2019-12-26 20:45:49,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:49,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:49,368 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 16 states. [2019-12-26 20:45:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,572 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-26 20:45:49,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:49,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:45:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,574 INFO L225 Difference]: With dead ends: 120 [2019-12-26 20:45:49,574 INFO L226 Difference]: Without dead ends: 119 [2019-12-26 20:45:49,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-26 20:45:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-26 20:45:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-26 20:45:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-26 20:45:49,579 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-26 20:45:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,580 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-26 20:45:49,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-26 20:45:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:49,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,581 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,786 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-26 20:45:49,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781435649] [2019-12-26 20:45:49,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781435649] [2019-12-26 20:45:49,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056350609] [2019-12-26 20:45:49,887 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:45:50,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620632500] [2019-12-26 20:45:50,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:45:50,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:45:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:50,072 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 18 states. [2019-12-26 20:45:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:50,252 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-26 20:45:50,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:50,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-26 20:45:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:50,254 INFO L225 Difference]: With dead ends: 131 [2019-12-26 20:45:50,254 INFO L226 Difference]: Without dead ends: 130 [2019-12-26 20:45:50,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-26 20:45:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-26 20:45:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:50,258 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:50,258 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:50,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:45:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:50,259 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:50,259 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,462 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 29 times [2019-12-26 20:45:50,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609147204] [2019-12-26 20:45:50,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609147204] [2019-12-26 20:45:50,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633634120] [2019-12-26 20:45:50,559 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:50,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:50,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:50,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861028493] [2019-12-26 20:45:50,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:50,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:50,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:50,738 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,027 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-26 20:45:51,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:51,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,028 INFO L225 Difference]: With dead ends: 149 [2019-12-26 20:45:51,029 INFO L226 Difference]: Without dead ends: 148 [2019-12-26 20:45:51,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:45:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-26 20:45:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-26 20:45:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:51,033 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,034 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:51,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:51,035 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,035 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:51,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,238 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 30 times [2019-12-26 20:45:51,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:51,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852792726] [2019-12-26 20:45:51,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:51,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852792726] [2019-12-26 20:45:51,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390408132] [2019-12-26 20:45:51,320 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,376 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:51,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:51,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:51,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:51,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:51,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:51,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66791751] [2019-12-26 20:45:51,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:51,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:51,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:51,492 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,815 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-26 20:45:51,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:51,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,816 INFO L225 Difference]: With dead ends: 157 [2019-12-26 20:45:51,817 INFO L226 Difference]: Without dead ends: 156 [2019-12-26 20:45:51,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:45:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-26 20:45:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2019-12-26 20:45:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:51,821 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,821 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:51,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:51,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,822 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,025 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,026 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 31 times [2019-12-26 20:45:52,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722663307] [2019-12-26 20:45:52,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722663307] [2019-12-26 20:45:52,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159237830] [2019-12-26 20:45:52,115 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:54,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:54,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268101473] [2019-12-26 20:45:54,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:54,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=179, Unknown=3, NotChecked=0, Total=240 [2019-12-26 20:45:54,162 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:55,114 WARN L192 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2019-12-26 20:45:55,937 WARN L192 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-26 20:45:56,391 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 11 [2019-12-26 20:45:56,936 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:45:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,043 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2019-12-26 20:45:57,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:57,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,045 INFO L225 Difference]: With dead ends: 162 [2019-12-26 20:45:57,045 INFO L226 Difference]: Without dead ends: 161 [2019-12-26 20:45:57,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=215, Invalid=484, Unknown=3, NotChecked=0, Total=702 [2019-12-26 20:45:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-26 20:45:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 111. [2019-12-26 20:45:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:57,050 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,050 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:57,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:57,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,051 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:57,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,252 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 32 times [2019-12-26 20:45:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:57,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933208276] [2019-12-26 20:45:57,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933208276] [2019-12-26 20:45:57,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556790041] [2019-12-26 20:45:57,344 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:57,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:57,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:57,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:57,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:57,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299226333] [2019-12-26 20:45:57,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:57,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:57,535 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,947 INFO L93 Difference]: Finished difference Result 165 states and 347 transitions. [2019-12-26 20:45:57,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:57,948 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,949 INFO L225 Difference]: With dead ends: 165 [2019-12-26 20:45:57,949 INFO L226 Difference]: Without dead ends: 163 [2019-12-26 20:45:57,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:45:57,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-26 20:45:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2019-12-26 20:45:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:57,954 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,954 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:57,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:57,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,955 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:58,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:58,157 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:58,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 33 times [2019-12-26 20:45:58,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:58,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591430548] [2019-12-26 20:45:58,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591430548] [2019-12-26 20:45:58,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869032487] [2019-12-26 20:45:58,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:58,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:58,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:58,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:58,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:58,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:58,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110640104] [2019-12-26 20:45:58,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:58,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:58,909 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:59,531 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-26 20:45:59,865 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2019-12-26 20:46:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:00,042 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2019-12-26 20:46:00,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:00,042 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:00,044 INFO L225 Difference]: With dead ends: 168 [2019-12-26 20:46:00,044 INFO L226 Difference]: Without dead ends: 167 [2019-12-26 20:46:00,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-26 20:46:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 112. [2019-12-26 20:46:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-26 20:46:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-26 20:46:00,048 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-26 20:46:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:00,049 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-26 20:46:00,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-26 20:46:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:00,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:00,050 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:00,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:00,253 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 34 times [2019-12-26 20:46:00,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:00,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770360914] [2019-12-26 20:46:00,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:00,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770360914] [2019-12-26 20:46:00,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391951998] [2019-12-26 20:46:00,333 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:00,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:00,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:00,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:00,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:01,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:01,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404903930] [2019-12-26 20:46:01,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:01,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:01,170 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-26 20:46:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,347 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2019-12-26 20:46:02,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:02,347 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,349 INFO L225 Difference]: With dead ends: 172 [2019-12-26 20:46:02,349 INFO L226 Difference]: Without dead ends: 171 [2019-12-26 20:46:02,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=492, Unknown=3, NotChecked=0, Total=702 [2019-12-26 20:46:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-26 20:46:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2019-12-26 20:46:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-26 20:46:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-26 20:46:02,354 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-26 20:46:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,354 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-26 20:46:02,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-26 20:46:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:02,354 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,354 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,555 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 35 times [2019-12-26 20:46:02,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370425556] [2019-12-26 20:46:02,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370425556] [2019-12-26 20:46:02,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234253502] [2019-12-26 20:46:02,647 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:02,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:03,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:03,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:03,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634738990] [2019-12-26 20:46:03,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:03,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:03,621 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 16 states. [2019-12-26 20:46:04,431 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-26 20:46:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:06,023 INFO L93 Difference]: Finished difference Result 173 states and 360 transitions. [2019-12-26 20:46:06,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:06,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:06,024 INFO L225 Difference]: With dead ends: 173 [2019-12-26 20:46:06,024 INFO L226 Difference]: Without dead ends: 172 [2019-12-26 20:46:06,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=243, Invalid=566, Unknown=3, NotChecked=0, Total=812 [2019-12-26 20:46:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-26 20:46:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2019-12-26 20:46:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:46:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:46:06,027 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:46:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:06,027 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:46:06,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:46:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:06,028 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:06,028 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:06,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:06,228 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 36 times [2019-12-26 20:46:06,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:06,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233247050] [2019-12-26 20:46:06,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233247050] [2019-12-26 20:46:06,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240526677] [2019-12-26 20:46:06,301 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:06,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:06,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:06,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:06,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:06,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:06,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787066928] [2019-12-26 20:46:06,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:06,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:06,478 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:46:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:06,938 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2019-12-26 20:46:06,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:06,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:06,939 INFO L225 Difference]: With dead ends: 182 [2019-12-26 20:46:06,939 INFO L226 Difference]: Without dead ends: 180 [2019-12-26 20:46:06,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-26 20:46:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 116. [2019-12-26 20:46:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:06,944 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:06,944 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:06,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:06,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:06,945 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:07,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:07,149 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 37 times [2019-12-26 20:46:07,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:07,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478932348] [2019-12-26 20:46:07,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:07,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478932348] [2019-12-26 20:46:07,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057357259] [2019-12-26 20:46:07,235 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:07,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:07,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:07,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:07,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:07,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779464613] [2019-12-26 20:46:07,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:07,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:07,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:07,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:07,443 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:07,854 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-26 20:46:07,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:07,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:07,856 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:07,856 INFO L226 Difference]: Without dead ends: 184 [2019-12-26 20:46:07,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-26 20:46:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2019-12-26 20:46:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:07,860 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:07,860 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:07,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:07,861 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:07,861 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:08,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:08,062 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 38 times [2019-12-26 20:46:08,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:08,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245846897] [2019-12-26 20:46:08,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:08,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245846897] [2019-12-26 20:46:08,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912635723] [2019-12-26 20:46:08,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:08,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:08,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:08,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:08,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:08,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:08,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:08,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514298060] [2019-12-26 20:46:08,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:08,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:08,381 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:08,924 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2019-12-26 20:46:08,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:46:08,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:08,926 INFO L225 Difference]: With dead ends: 177 [2019-12-26 20:46:08,926 INFO L226 Difference]: Without dead ends: 175 [2019-12-26 20:46:08,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-26 20:46:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2019-12-26 20:46:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-26 20:46:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 268 transitions. [2019-12-26 20:46:08,931 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 268 transitions. Word has length 13 [2019-12-26 20:46:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:08,931 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 268 transitions. [2019-12-26 20:46:08,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 268 transitions. [2019-12-26 20:46:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:08,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:08,932 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:09,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:09,135 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 39 times [2019-12-26 20:46:09,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:09,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425351174] [2019-12-26 20:46:09,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425351174] [2019-12-26 20:46:09,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128894142] [2019-12-26 20:46:09,226 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:09,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:46:09,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:09,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:09,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:09,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774275039] [2019-12-26 20:46:09,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:09,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:09,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:09,568 INFO L87 Difference]: Start difference. First operand 115 states and 268 transitions. Second operand 16 states. [2019-12-26 20:46:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:10,077 INFO L93 Difference]: Finished difference Result 167 states and 357 transitions. [2019-12-26 20:46:10,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:10,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:10,079 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:10,079 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:10,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 116. [2019-12-26 20:46:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:10,083 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:10,083 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:10,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:10,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:10,084 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:10,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,287 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 40 times [2019-12-26 20:46:10,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:10,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270723627] [2019-12-26 20:46:10,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:10,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270723627] [2019-12-26 20:46:10,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704619068] [2019-12-26 20:46:10,379 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,432 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:10,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:10,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:10,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:10,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:10,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:10,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277584787] [2019-12-26 20:46:10,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:10,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:10,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:10,625 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:11,029 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2019-12-26 20:46:11,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:11,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:11,031 INFO L225 Difference]: With dead ends: 174 [2019-12-26 20:46:11,031 INFO L226 Difference]: Without dead ends: 173 [2019-12-26 20:46:11,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-26 20:46:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2019-12-26 20:46:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:11,035 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:11,035 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:11,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:11,036 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:11,036 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:11,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,240 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 41 times [2019-12-26 20:46:11,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:11,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943939479] [2019-12-26 20:46:11,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:11,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943939479] [2019-12-26 20:46:11,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485329370] [2019-12-26 20:46:11,318 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,360 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:11,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:11,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:11,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:11,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:11,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:11,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009109582] [2019-12-26 20:46:11,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:11,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:11,645 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:14,256 INFO L93 Difference]: Finished difference Result 167 states and 360 transitions. [2019-12-26 20:46:14,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:14,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:14,258 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:14,258 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:14,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2019-12-26 20:46:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-26 20:46:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2019-12-26 20:46:14,263 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 13 [2019-12-26 20:46:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:14,263 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2019-12-26 20:46:14,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2019-12-26 20:46:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:14,263 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:14,264 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:14,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:14,467 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 42 times [2019-12-26 20:46:14,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:14,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747433377] [2019-12-26 20:46:14,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747433377] [2019-12-26 20:46:14,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580139230] [2019-12-26 20:46:14,550 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:14,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:14,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:14,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:14,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:14,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:14,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113175079] [2019-12-26 20:46:14,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:14,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:14,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:14,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:14,750 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand 16 states. [2019-12-26 20:46:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:15,032 INFO L93 Difference]: Finished difference Result 144 states and 304 transitions. [2019-12-26 20:46:15,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:15,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:15,034 INFO L225 Difference]: With dead ends: 144 [2019-12-26 20:46:15,034 INFO L226 Difference]: Without dead ends: 143 [2019-12-26 20:46:15,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-26 20:46:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2019-12-26 20:46:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:15,038 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:15,038 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:15,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:15,039 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:15,039 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:15,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:15,242 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 43 times [2019-12-26 20:46:15,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:15,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329039131] [2019-12-26 20:46:15,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:15,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329039131] [2019-12-26 20:46:15,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161870784] [2019-12-26 20:46:15,318 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:15,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:15,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:17,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:17,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:17,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146653735] [2019-12-26 20:46:17,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:17,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=175, Unknown=4, NotChecked=0, Total=240 [2019-12-26 20:46:17,974 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:18,838 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-26 20:46:21,574 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-26 20:46:22,068 WARN L192 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:22,772 WARN L192 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:23,203 INFO L93 Difference]: Finished difference Result 190 states and 396 transitions. [2019-12-26 20:46:23,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:23,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:23,205 INFO L225 Difference]: With dead ends: 190 [2019-12-26 20:46:23,205 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:23,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=276, Invalid=647, Unknown=7, NotChecked=0, Total=930 [2019-12-26 20:46:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 117. [2019-12-26 20:46:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-26 20:46:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-26 20:46:23,209 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-26 20:46:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:23,210 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-26 20:46:23,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-26 20:46:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:23,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:23,210 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:23,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:23,411 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 44 times [2019-12-26 20:46:23,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:23,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467602813] [2019-12-26 20:46:23,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:23,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467602813] [2019-12-26 20:46:23,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072133480] [2019-12-26 20:46:23,498 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:23,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:23,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:23,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:23,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:24,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:24,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:24,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996620594] [2019-12-26 20:46:24,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:24,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:24,278 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 16 states. [2019-12-26 20:46:25,096 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-26 20:46:26,102 WARN L192 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-26 20:46:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:26,172 INFO L93 Difference]: Finished difference Result 186 states and 395 transitions. [2019-12-26 20:46:26,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:26,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:26,174 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:26,174 INFO L226 Difference]: Without dead ends: 184 [2019-12-26 20:46:26,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-26 20:46:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2019-12-26 20:46:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:26,177 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:26,177 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:26,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:26,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:26,178 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:26,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:26,379 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:26,379 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 45 times [2019-12-26 20:46:26,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:26,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952248230] [2019-12-26 20:46:26,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:26,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952248230] [2019-12-26 20:46:26,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763785164] [2019-12-26 20:46:26,466 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:26,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:26,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:26,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:26,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:26,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:26,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:26,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752623813] [2019-12-26 20:46:26,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:26,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:26,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:26,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:26,697 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:27,383 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-26 20:46:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:27,936 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-26 20:46:27,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:27,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:27,938 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:27,938 INFO L226 Difference]: Without dead ends: 184 [2019-12-26 20:46:27,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=603, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:46:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-26 20:46:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 118. [2019-12-26 20:46:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-26 20:46:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 271 transitions. [2019-12-26 20:46:27,942 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 271 transitions. Word has length 13 [2019-12-26 20:46:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:27,943 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 271 transitions. [2019-12-26 20:46:27,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 271 transitions. [2019-12-26 20:46:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:27,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:27,943 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:28,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:28,147 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 46 times [2019-12-26 20:46:28,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:28,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472917521] [2019-12-26 20:46:28,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472917521] [2019-12-26 20:46:28,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602005588] [2019-12-26 20:46:28,236 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:28,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:28,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:28,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:28,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:28,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:28,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137360835] [2019-12-26 20:46:28,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:28,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:28,386 INFO L87 Difference]: Start difference. First operand 118 states and 271 transitions. Second operand 16 states. [2019-12-26 20:46:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:28,781 INFO L93 Difference]: Finished difference Result 193 states and 408 transitions. [2019-12-26 20:46:28,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:46:28,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:28,783 INFO L225 Difference]: With dead ends: 193 [2019-12-26 20:46:28,783 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:28,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:46:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 120. [2019-12-26 20:46:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:28,788 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:28,788 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:28,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:28,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:28,789 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:28,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:28,992 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 47 times [2019-12-26 20:46:28,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:28,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994499096] [2019-12-26 20:46:28,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994499096] [2019-12-26 20:46:29,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180874711] [2019-12-26 20:46:29,070 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,111 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:29,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:29,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:29,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:29,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:29,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255122562] [2019-12-26 20:46:29,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:29,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:29,221 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:29,603 INFO L93 Difference]: Finished difference Result 190 states and 411 transitions. [2019-12-26 20:46:29,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:29,603 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:29,605 INFO L225 Difference]: With dead ends: 190 [2019-12-26 20:46:29,605 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:29,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2019-12-26 20:46:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:46:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-26 20:46:29,609 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-26 20:46:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:29,610 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-26 20:46:29,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-26 20:46:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:29,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:29,610 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:29,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,813 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 48 times [2019-12-26 20:46:29,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:29,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530234617] [2019-12-26 20:46:29,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530234617] [2019-12-26 20:46:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185106633] [2019-12-26 20:46:29,887 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:29,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:29,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:29,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:30,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:30,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846613777] [2019-12-26 20:46:30,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:30,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:30,030 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-26 20:46:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:30,309 INFO L93 Difference]: Finished difference Result 191 states and 415 transitions. [2019-12-26 20:46:30,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:30,310 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:30,311 INFO L225 Difference]: With dead ends: 191 [2019-12-26 20:46:30,311 INFO L226 Difference]: Without dead ends: 189 [2019-12-26 20:46:30,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-26 20:46:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 120. [2019-12-26 20:46:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:30,316 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:30,316 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:30,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:30,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:30,317 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:30,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:30,518 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 49 times [2019-12-26 20:46:30,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:30,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713581125] [2019-12-26 20:46:30,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713581125] [2019-12-26 20:46:30,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423303857] [2019-12-26 20:46:30,587 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:30,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:30,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:30,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705253662] [2019-12-26 20:46:30,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:30,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:30,738 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:31,098 INFO L93 Difference]: Finished difference Result 190 states and 405 transitions. [2019-12-26 20:46:31,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:31,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:31,100 INFO L225 Difference]: With dead ends: 190 [2019-12-26 20:46:31,100 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:31,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 123. [2019-12-26 20:46:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-26 20:46:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-26 20:46:31,103 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 13 [2019-12-26 20:46:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:31,103 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-26 20:46:31,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-26 20:46:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:31,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:31,104 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:31,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:31,306 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 50 times [2019-12-26 20:46:31,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:31,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248263627] [2019-12-26 20:46:31,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:31,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248263627] [2019-12-26 20:46:31,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265786267] [2019-12-26 20:46:31,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:31,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:31,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:31,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:31,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:31,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:31,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:31,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379447193] [2019-12-26 20:46:31,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:31,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:31,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:31,633 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 16 states. [2019-12-26 20:46:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,126 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2019-12-26 20:46:32,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:32,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,128 INFO L225 Difference]: With dead ends: 193 [2019-12-26 20:46:32,128 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:32,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 120. [2019-12-26 20:46:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:32,132 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,132 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:32,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,133 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:32,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:32,336 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 51 times [2019-12-26 20:46:32,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:32,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89392713] [2019-12-26 20:46:32,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89392713] [2019-12-26 20:46:32,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20439507] [2019-12-26 20:46:32,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:32,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:32,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:32,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:32,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:32,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:32,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888363037] [2019-12-26 20:46:32,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:32,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:32,551 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,852 INFO L93 Difference]: Finished difference Result 159 states and 343 transitions. [2019-12-26 20:46:32,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:32,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,853 INFO L225 Difference]: With dead ends: 159 [2019-12-26 20:46:32,854 INFO L226 Difference]: Without dead ends: 158 [2019-12-26 20:46:32,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-26 20:46:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2019-12-26 20:46:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:46:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-26 20:46:32,857 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-26 20:46:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,858 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-26 20:46:32,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-26 20:46:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,858 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:33,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:33,059 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash 974484002, now seen corresponding path program 52 times [2019-12-26 20:46:33,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:33,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243574634] [2019-12-26 20:46:33,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243574634] [2019-12-26 20:46:33,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622235011] [2019-12-26 20:46:33,129 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:33,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:33,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:33,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:33,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:33,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:33,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728287370] [2019-12-26 20:46:33,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:33,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:33,295 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-26 20:46:33,883 WARN L192 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-26 20:46:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:34,269 INFO L93 Difference]: Finished difference Result 172 states and 365 transitions. [2019-12-26 20:46:34,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:34,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:34,271 INFO L225 Difference]: With dead ends: 172 [2019-12-26 20:46:34,271 INFO L226 Difference]: Without dead ends: 171 [2019-12-26 20:46:34,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-26 20:46:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 120. [2019-12-26 20:46:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:34,274 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:34,275 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:34,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:34,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:34,275 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:34,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:34,476 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 53 times [2019-12-26 20:46:34,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:34,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104378307] [2019-12-26 20:46:34,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:34,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104378307] [2019-12-26 20:46:34,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068387602] [2019-12-26 20:46:34,554 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:34,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:34,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:34,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:34,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:34,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:34,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:34,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760176686] [2019-12-26 20:46:34,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:34,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:34,702 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:35,031 INFO L93 Difference]: Finished difference Result 164 states and 348 transitions. [2019-12-26 20:46:35,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:35,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:35,033 INFO L225 Difference]: With dead ends: 164 [2019-12-26 20:46:35,033 INFO L226 Difference]: Without dead ends: 163 [2019-12-26 20:46:35,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-26 20:46:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2019-12-26 20:46:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-26 20:46:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 275 transitions. [2019-12-26 20:46:35,037 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 275 transitions. Word has length 13 [2019-12-26 20:46:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:35,038 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 275 transitions. [2019-12-26 20:46:35,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 275 transitions. [2019-12-26 20:46:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:35,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:35,039 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:35,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:35,241 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 54 times [2019-12-26 20:46:35,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:35,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688214341] [2019-12-26 20:46:35,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688214341] [2019-12-26 20:46:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659567856] [2019-12-26 20:46:35,326 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:35,369 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:46:35,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:35,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:35,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:35,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:35,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:35,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673953174] [2019-12-26 20:46:35,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:35,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:35,489 INFO L87 Difference]: Start difference. First operand 119 states and 275 transitions. Second operand 16 states. [2019-12-26 20:46:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:35,859 INFO L93 Difference]: Finished difference Result 171 states and 359 transitions. [2019-12-26 20:46:35,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:35,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:35,861 INFO L225 Difference]: With dead ends: 171 [2019-12-26 20:46:35,861 INFO L226 Difference]: Without dead ends: 169 [2019-12-26 20:46:35,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-26 20:46:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 116. [2019-12-26 20:46:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:35,865 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:35,865 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:35,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:35,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:35,866 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:36,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,066 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 55 times [2019-12-26 20:46:36,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:36,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002158739] [2019-12-26 20:46:36,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:36,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002158739] [2019-12-26 20:46:36,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945665359] [2019-12-26 20:46:36,136 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:36,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:36,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:36,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:36,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:36,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809539742] [2019-12-26 20:46:36,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:36,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:36,290 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:36,727 INFO L93 Difference]: Finished difference Result 178 states and 371 transitions. [2019-12-26 20:46:36,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:36,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:36,729 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:46:36,729 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:46:36,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:46:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2019-12-26 20:46:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-26 20:46:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-26 20:46:36,733 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-26 20:46:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:36,733 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-26 20:46:36,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-26 20:46:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:36,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:36,734 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:36,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,941 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 56 times [2019-12-26 20:46:36,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:36,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731363576] [2019-12-26 20:46:36,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:37,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731363576] [2019-12-26 20:46:37,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816411204] [2019-12-26 20:46:37,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:37,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:37,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:37,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:37,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:37,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:37,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:37,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992554965] [2019-12-26 20:46:37,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:37,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:37,228 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 16 states. [2019-12-26 20:46:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:37,509 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2019-12-26 20:46:37,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:37,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:37,511 INFO L225 Difference]: With dead ends: 173 [2019-12-26 20:46:37,511 INFO L226 Difference]: Without dead ends: 171 [2019-12-26 20:46:37,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-26 20:46:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2019-12-26 20:46:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:37,514 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:37,515 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:37,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:37,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:37,516 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:37,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:37,717 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:37,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 57 times [2019-12-26 20:46:37,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:37,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960201567] [2019-12-26 20:46:37,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:37,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960201567] [2019-12-26 20:46:37,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907705637] [2019-12-26 20:46:37,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:37,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:37,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:37,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:37,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:37,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:37,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220394881] [2019-12-26 20:46:37,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:37,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:37,948 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:38,330 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2019-12-26 20:46:38,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:38,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:38,332 INFO L225 Difference]: With dead ends: 172 [2019-12-26 20:46:38,332 INFO L226 Difference]: Without dead ends: 170 [2019-12-26 20:46:38,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-26 20:46:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2019-12-26 20:46:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-26 20:46:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-26 20:46:38,334 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-26 20:46:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:38,335 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-26 20:46:38,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-26 20:46:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:38,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:38,335 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:38,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:38,536 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 58 times [2019-12-26 20:46:38,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:38,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592479282] [2019-12-26 20:46:38,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:38,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592479282] [2019-12-26 20:46:38,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303992294] [2019-12-26 20:46:38,615 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:38,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:38,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:38,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:38,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:38,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:38,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:38,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947887548] [2019-12-26 20:46:38,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:38,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:38,746 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 16 states. [2019-12-26 20:46:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:39,024 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2019-12-26 20:46:39,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:39,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:39,026 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:46:39,026 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:46:39,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:46:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2019-12-26 20:46:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-26 20:46:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-26 20:46:39,029 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-26 20:46:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:39,030 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-26 20:46:39,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-26 20:46:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:39,030 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:39,030 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,233 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-26 20:46:39,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:39,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334636252] [2019-12-26 20:46:39,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334636252] [2019-12-26 20:46:39,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709328770] [2019-12-26 20:46:39,310 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:39,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:39,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:39,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942734616] [2019-12-26 20:46:39,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:39,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:39,467 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 18 states. [2019-12-26 20:46:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:39,648 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-26 20:46:39,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:46:39,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-26 20:46:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:39,650 INFO L225 Difference]: With dead ends: 135 [2019-12-26 20:46:39,650 INFO L226 Difference]: Without dead ends: 134 [2019-12-26 20:46:39,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-26 20:46:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-26 20:46:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-26 20:46:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-26 20:46:39,654 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-26 20:46:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:39,654 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-26 20:46:39,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-26 20:46:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:39,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:39,655 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,858 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-26 20:46:39,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:39,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484543417] [2019-12-26 20:46:39,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484543417] [2019-12-26 20:46:39,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574284171] [2019-12-26 20:46:39,953 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:39,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:39,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:39,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:46:39,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:40,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:40,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:46:40,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998118519] [2019-12-26 20:46:40,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:46:40,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:46:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:46:40,140 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 20 states. [2019-12-26 20:46:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:40,358 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-26 20:46:40,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:46:40,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-12-26 20:46:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:40,360 INFO L225 Difference]: With dead ends: 146 [2019-12-26 20:46:40,360 INFO L226 Difference]: Without dead ends: 145 [2019-12-26 20:46:40,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-26 20:46:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-26 20:46:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:40,364 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:40,364 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:40,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:46:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:40,365 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:40,365 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:40,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:40,566 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 59 times [2019-12-26 20:46:40,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:40,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953012186] [2019-12-26 20:46:40,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:40,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953012186] [2019-12-26 20:46:40,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705259234] [2019-12-26 20:46:40,670 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:40,718 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:46:40,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:40,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:40,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:40,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:40,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:40,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762388539] [2019-12-26 20:46:40,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:40,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:40,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:40,842 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:41,194 INFO L93 Difference]: Finished difference Result 167 states and 353 transitions. [2019-12-26 20:46:41,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:41,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:41,196 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:41,196 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:41,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-26 20:46:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:41,200 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:41,201 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:41,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:41,201 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:41,201 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:41,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:41,402 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:41,402 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 60 times [2019-12-26 20:46:41,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:41,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258460089] [2019-12-26 20:46:41,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:41,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258460089] [2019-12-26 20:46:41,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859210669] [2019-12-26 20:46:41,485 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:41,528 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:41,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:41,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:41,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:41,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:41,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:41,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808492722] [2019-12-26 20:46:41,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:41,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:41,687 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:42,129 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-26 20:46:42,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:42,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:42,131 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:42,132 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:46:42,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:46:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:46:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-26 20:46:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:42,136 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:42,136 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:42,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:42,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:42,136 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:42,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:42,338 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 61 times [2019-12-26 20:46:42,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:42,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242600221] [2019-12-26 20:46:42,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:42,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242600221] [2019-12-26 20:46:42,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591484293] [2019-12-26 20:46:42,432 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:42,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:42,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:43,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:43,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:43,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763392416] [2019-12-26 20:46:43,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:43,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:43,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:46:43,959 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:44,611 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:46:45,829 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-26 20:46:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:47,968 INFO L93 Difference]: Finished difference Result 192 states and 399 transitions. [2019-12-26 20:46:47,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:47,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:47,970 INFO L225 Difference]: With dead ends: 192 [2019-12-26 20:46:47,970 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:47,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=282, Invalid=644, Unknown=4, NotChecked=0, Total=930 [2019-12-26 20:46:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2019-12-26 20:46:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:47,973 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:47,973 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:47,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:47,974 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:47,974 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:48,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:48,177 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 62 times [2019-12-26 20:46:48,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:48,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800584066] [2019-12-26 20:46:48,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:48,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800584066] [2019-12-26 20:46:48,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078289760] [2019-12-26 20:46:48,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:48,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:48,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:48,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:48,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:48,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:48,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:48,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629265395] [2019-12-26 20:46:48,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:48,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:48,457 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:48,926 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-26 20:46:48,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:48,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:48,928 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:48,928 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:46:48,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:46:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:46:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-26 20:46:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:48,931 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:48,931 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:48,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:48,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:48,932 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:49,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:49,135 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 63 times [2019-12-26 20:46:49,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:49,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029087070] [2019-12-26 20:46:49,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:49,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029087070] [2019-12-26 20:46:49,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944922652] [2019-12-26 20:46:49,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:49,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:49,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:49,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:49,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:49,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:49,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:49,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645498076] [2019-12-26 20:46:49,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:49,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:49,439 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:50,791 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:50,893 INFO L93 Difference]: Finished difference Result 198 states and 417 transitions. [2019-12-26 20:46:50,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:50,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:50,895 INFO L225 Difference]: With dead ends: 198 [2019-12-26 20:46:50,895 INFO L226 Difference]: Without dead ends: 197 [2019-12-26 20:46:50,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=313, Invalid=678, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:46:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-26 20:46:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2019-12-26 20:46:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:46:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-26 20:46:50,898 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-26 20:46:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:50,899 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-26 20:46:50,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-26 20:46:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:50,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:50,899 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:51,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:51,100 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 64 times [2019-12-26 20:46:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:51,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079206527] [2019-12-26 20:46:51,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:51,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079206527] [2019-12-26 20:46:51,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116094844] [2019-12-26 20:46:51,199 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:51,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:51,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:51,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:51,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:53,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:53,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:53,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19331129] [2019-12-26 20:46:53,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:53,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:46:53,592 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-26 20:46:54,423 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:55,639 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-26 20:46:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:55,811 INFO L93 Difference]: Finished difference Result 202 states and 424 transitions. [2019-12-26 20:46:55,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:55,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:55,813 INFO L225 Difference]: With dead ends: 202 [2019-12-26 20:46:55,813 INFO L226 Difference]: Without dead ends: 201 [2019-12-26 20:46:55,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=303, Invalid=686, Unknown=3, NotChecked=0, Total=992 [2019-12-26 20:46:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-26 20:46:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2019-12-26 20:46:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:46:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-26 20:46:55,816 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-26 20:46:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:55,817 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-26 20:46:55,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-26 20:46:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:55,817 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:55,817 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:56,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:56,018 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 65 times [2019-12-26 20:46:56,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:56,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271138850] [2019-12-26 20:46:56,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:56,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271138850] [2019-12-26 20:46:56,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269661126] [2019-12-26 20:46:56,118 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:56,161 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:46:56,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:56,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:56,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:59,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:59,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585156266] [2019-12-26 20:46:59,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:59,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=228, Unknown=5, NotChecked=0, Total=306 [2019-12-26 20:46:59,116 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-26 20:46:59,523 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-26 20:47:00,509 WARN L192 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:47:01,067 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-26 20:47:01,854 WARN L192 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:47:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:03,283 INFO L93 Difference]: Finished difference Result 196 states and 409 transitions. [2019-12-26 20:47:03,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:03,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:03,285 INFO L225 Difference]: With dead ends: 196 [2019-12-26 20:47:03,285 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:47:03,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=310, Invalid=675, Unknown=7, NotChecked=0, Total=992 [2019-12-26 20:47:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:47:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 124. [2019-12-26 20:47:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:47:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:47:03,289 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:47:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:03,289 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:47:03,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:47:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:03,290 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:03,290 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:03,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:03,493 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:03,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 66 times [2019-12-26 20:47:03,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:03,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595071459] [2019-12-26 20:47:03,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:03,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595071459] [2019-12-26 20:47:03,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860562903] [2019-12-26 20:47:03,581 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:03,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:03,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:03,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:03,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:03,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:03,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:03,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519670182] [2019-12-26 20:47:03,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:03,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:03,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:03,751 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:47:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:04,240 INFO L93 Difference]: Finished difference Result 192 states and 403 transitions. [2019-12-26 20:47:04,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:04,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:04,242 INFO L225 Difference]: With dead ends: 192 [2019-12-26 20:47:04,242 INFO L226 Difference]: Without dead ends: 190 [2019-12-26 20:47:04,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:47:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-26 20:47:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 124. [2019-12-26 20:47:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:47:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:47:04,246 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:47:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:04,246 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:47:04,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:47:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:04,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:04,247 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:04,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:04,448 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 67 times [2019-12-26 20:47:04,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:04,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318799192] [2019-12-26 20:47:04,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318799192] [2019-12-26 20:47:04,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749236193] [2019-12-26 20:47:04,540 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:04,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:05,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:05,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583441438] [2019-12-26 20:47:05,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:05,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:05,310 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:47:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:06,742 INFO L93 Difference]: Finished difference Result 209 states and 441 transitions. [2019-12-26 20:47:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:06,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:06,744 INFO L225 Difference]: With dead ends: 209 [2019-12-26 20:47:06,744 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:47:06,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=351, Invalid=768, Unknown=3, NotChecked=0, Total=1122 [2019-12-26 20:47:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:47:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2019-12-26 20:47:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:47:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-26 20:47:06,748 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-26 20:47:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:06,748 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-26 20:47:06,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-26 20:47:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:06,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:06,749 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:06,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:06,950 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 68 times [2019-12-26 20:47:06,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:06,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150349049] [2019-12-26 20:47:06,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:07,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150349049] [2019-12-26 20:47:07,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294475569] [2019-12-26 20:47:07,038 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:07,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:07,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:07,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:07,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:11,486 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:47:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:11,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:11,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:11,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143136794] [2019-12-26 20:47:11,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:11,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:11,488 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-26 20:47:12,427 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:47:12,988 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-26 20:47:13,180 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-26 20:47:14,041 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:47:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:14,097 INFO L93 Difference]: Finished difference Result 213 states and 447 transitions. [2019-12-26 20:47:14,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:14,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:14,099 INFO L225 Difference]: With dead ends: 213 [2019-12-26 20:47:14,099 INFO L226 Difference]: Without dead ends: 212 [2019-12-26 20:47:14,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=350, Invalid=770, Unknown=2, NotChecked=0, Total=1122 [2019-12-26 20:47:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-26 20:47:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 129. [2019-12-26 20:47:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:14,103 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:14,103 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:14,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:14,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:14,104 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:14,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:14,305 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 69 times [2019-12-26 20:47:14,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:14,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145878223] [2019-12-26 20:47:14,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:14,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145878223] [2019-12-26 20:47:14,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013028140] [2019-12-26 20:47:14,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:14,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:47:14,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:14,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:14,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:16,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:16,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:16,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003429390] [2019-12-26 20:47:16,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:16,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:47:16,737 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:17,363 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-12-26 20:47:18,213 WARN L192 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2019-12-26 20:47:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:21,330 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2019-12-26 20:47:21,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:21,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:21,333 INFO L225 Difference]: With dead ends: 213 [2019-12-26 20:47:21,333 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:47:21,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=373, Invalid=813, Unknown=4, NotChecked=0, Total=1190 [2019-12-26 20:47:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:47:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2019-12-26 20:47:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-26 20:47:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 298 transitions. [2019-12-26 20:47:21,336 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 298 transitions. Word has length 14 [2019-12-26 20:47:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:21,336 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 298 transitions. [2019-12-26 20:47:21,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 298 transitions. [2019-12-26 20:47:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:21,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:21,337 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:21,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:21,541 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 70 times [2019-12-26 20:47:21,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:21,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018613437] [2019-12-26 20:47:21,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:21,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018613437] [2019-12-26 20:47:21,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324268710] [2019-12-26 20:47:21,626 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:21,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:21,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:21,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:21,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:25,101 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:47:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:25,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:25,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:25,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690331903] [2019-12-26 20:47:25,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:25,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:25,699 INFO L87 Difference]: Start difference. First operand 128 states and 298 transitions. Second operand 18 states. [2019-12-26 20:47:26,482 WARN L192 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-12-26 20:47:27,121 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-26 20:47:27,546 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-26 20:47:28,427 WARN L192 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-26 20:47:30,158 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-26 20:47:31,151 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-26 20:47:31,626 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-26 20:47:32,805 WARN L192 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-26 20:47:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:32,859 INFO L93 Difference]: Finished difference Result 211 states and 448 transitions. [2019-12-26 20:47:32,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:32,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:32,861 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:47:32,862 INFO L226 Difference]: Without dead ends: 210 [2019-12-26 20:47:32,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=295, Invalid=757, Unknown=4, NotChecked=0, Total=1056 [2019-12-26 20:47:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-26 20:47:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 129. [2019-12-26 20:47:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:32,866 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:32,866 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:32,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:32,867 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:32,867 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:33,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:33,070 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 71 times [2019-12-26 20:47:33,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:33,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635850598] [2019-12-26 20:47:33,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:33,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635850598] [2019-12-26 20:47:33,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230262537] [2019-12-26 20:47:33,166 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:33,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:33,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:33,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:33,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:33,748 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_300 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_300) 1)) (<= c_~j~0 (+ v_~i~0_300 c_~i~0 1)) (<= (div (+ (* v_~i~0_300 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-26 20:47:34,125 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_300 Int)) (and (<= c_~j~0 (+ (* 3 v_~i~0_300) 2)) (<= (div (+ (* v_~i~0_300 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ (* 2 v_~i~0_300) c_~j~0 1)))) is different from true [2019-12-26 20:47:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-26 20:47:34,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:34,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:34,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821134551] [2019-12-26 20:47:34,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:34,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=177, Unknown=2, NotChecked=58, Total=306 [2019-12-26 20:47:34,128 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:35,420 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2019-12-26 20:47:38,113 WARN L192 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-26 20:47:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:38,127 INFO L93 Difference]: Finished difference Result 196 states and 433 transitions. [2019-12-26 20:47:38,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:38,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:38,129 INFO L225 Difference]: With dead ends: 196 [2019-12-26 20:47:38,130 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:47:38,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=272, Invalid=603, Unknown=3, NotChecked=114, Total=992 [2019-12-26 20:47:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:47:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2019-12-26 20:47:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:38,132 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:38,133 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:38,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:38,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:38,133 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:38,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:38,335 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:38,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 72 times [2019-12-26 20:47:38,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:38,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83194814] [2019-12-26 20:47:38,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:38,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83194814] [2019-12-26 20:47:38,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959804625] [2019-12-26 20:47:38,446 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:38,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:38,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:38,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:38,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:44,469 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:47:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:44,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:44,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:44,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837126167] [2019-12-26 20:47:44,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:44,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:47:44,471 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:45,084 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2019-12-26 20:47:49,811 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:47:59,358 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:47:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:59,415 INFO L93 Difference]: Finished difference Result 206 states and 440 transitions. [2019-12-26 20:47:59,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:59,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:59,417 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:47:59,417 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:47:59,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=280, Invalid=706, Unknown=6, NotChecked=0, Total=992 [2019-12-26 20:47:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:47:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 127. [2019-12-26 20:47:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:47:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-26 20:47:59,421 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-26 20:47:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:59,422 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-26 20:47:59,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-26 20:47:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:59,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:59,423 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:59,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:59,626 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 73 times [2019-12-26 20:47:59,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:59,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95733298] [2019-12-26 20:47:59,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:59,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95733298] [2019-12-26 20:47:59,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862128576] [2019-12-26 20:47:59,727 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:59,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:59,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:59,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:59,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:59,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216758069] [2019-12-26 20:47:59,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:59,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:59,974 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-26 20:48:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:00,684 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-26 20:48:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:00,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:00,686 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:48:00,686 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:48:00,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:48:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:48:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 131. [2019-12-26 20:48:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:48:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-26 20:48:00,690 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-26 20:48:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:00,690 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-26 20:48:00,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-26 20:48:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:00,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:00,691 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:00,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:00,892 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 74 times [2019-12-26 20:48:00,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:00,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146734490] [2019-12-26 20:48:00,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:00,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146734490] [2019-12-26 20:48:00,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440092533] [2019-12-26 20:48:00,978 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:01,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:01,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:01,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:01,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:01,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:01,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:01,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576750287] [2019-12-26 20:48:01,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:01,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:01,198 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-26 20:48:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:01,910 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2019-12-26 20:48:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:01,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:01,912 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:48:01,912 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:48:01,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:48:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:48:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 130. [2019-12-26 20:48:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-26 20:48:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-26 20:48:01,916 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-26 20:48:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:01,916 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-26 20:48:01,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-26 20:48:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:01,917 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:01,917 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:02,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:02,117 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 75 times [2019-12-26 20:48:02,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:02,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794626013] [2019-12-26 20:48:02,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:02,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794626013] [2019-12-26 20:48:02,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450678110] [2019-12-26 20:48:02,211 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:48:02,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:48:02,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:02,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:02,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:02,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:02,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:02,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852571658] [2019-12-26 20:48:02,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:02,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:02,538 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-26 20:48:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:03,202 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-26 20:48:03,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:03,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:03,204 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:48:03,204 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:48:03,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:48:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 130. [2019-12-26 20:48:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-26 20:48:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-26 20:48:03,208 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-26 20:48:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:03,208 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-26 20:48:03,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-26 20:48:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:03,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:03,209 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:03,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:03,409 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 76 times [2019-12-26 20:48:03,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:03,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658205117] [2019-12-26 20:48:03,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:03,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658205117] [2019-12-26 20:48:03,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332487084] [2019-12-26 20:48:03,495 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 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 [2019-12-26 20:48:03,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:03,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:03,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:03,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:03,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:03,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:03,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961156866] [2019-12-26 20:48:03,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:03,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:03,752 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-26 20:48:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:04,391 INFO L93 Difference]: Finished difference Result 235 states and 500 transitions. [2019-12-26 20:48:04,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:04,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:04,393 INFO L225 Difference]: With dead ends: 235 [2019-12-26 20:48:04,393 INFO L226 Difference]: Without dead ends: 233 [2019-12-26 20:48:04,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:48:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-26 20:48:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 134. [2019-12-26 20:48:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:04,397 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:04,397 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:04,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:04,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:04,398 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:04,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:04,598 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 77 times [2019-12-26 20:48:04,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:04,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696909675] [2019-12-26 20:48:04,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:04,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696909675] [2019-12-26 20:48:04,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250651337] [2019-12-26 20:48:04,687 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:04,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:48:04,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:04,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:04,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:13,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:13,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:13,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705604925] [2019-12-26 20:48:13,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:13,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:13,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:48:13,193 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:17,948 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-26 20:48:20,199 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:48:22,608 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-26 20:48:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:24,958 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2019-12-26 20:48:24,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:48:24,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:24,960 INFO L225 Difference]: With dead ends: 228 [2019-12-26 20:48:24,960 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:48:24,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=334, Invalid=786, Unknown=2, NotChecked=0, Total=1122 [2019-12-26 20:48:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:48:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2019-12-26 20:48:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:24,964 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:24,964 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:24,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:24,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:24,965 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:25,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:25,165 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 78 times [2019-12-26 20:48:25,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:25,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293009774] [2019-12-26 20:48:25,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:25,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293009774] [2019-12-26 20:48:25,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165003100] [2019-12-26 20:48:25,259 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:25,299 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:48:25,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:25,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:25,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:25,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:25,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:25,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578524060] [2019-12-26 20:48:25,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:25,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:25,530 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:26,559 INFO L93 Difference]: Finished difference Result 205 states and 442 transitions. [2019-12-26 20:48:26,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:48:26,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:26,561 INFO L225 Difference]: With dead ends: 205 [2019-12-26 20:48:26,561 INFO L226 Difference]: Without dead ends: 204 [2019-12-26 20:48:26,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:48:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-26 20:48:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 134. [2019-12-26 20:48:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:26,567 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:26,567 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:26,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:26,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:26,568 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:26,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:26,771 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 79 times [2019-12-26 20:48:26,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:26,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427906826] [2019-12-26 20:48:26,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:26,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427906826] [2019-12-26 20:48:26,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496392046] [2019-12-26 20:48:26,893 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:26,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:26,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:37,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:37,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:37,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170518329] [2019-12-26 20:48:37,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:37,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:37,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:48:37,590 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:39,911 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:48:44,517 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:48:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:46,632 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-26 20:48:46,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:46,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:46,634 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:48:46,635 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:48:46,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=271, Invalid=657, Unknown=2, NotChecked=0, Total=930 [2019-12-26 20:48:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:48:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2019-12-26 20:48:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:48:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 326 transitions. [2019-12-26 20:48:46,638 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 326 transitions. Word has length 14 [2019-12-26 20:48:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:46,639 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 326 transitions. [2019-12-26 20:48:46,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 326 transitions. [2019-12-26 20:48:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:46,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:46,639 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:46,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:46,840 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 80 times [2019-12-26 20:48:46,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:46,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419148062] [2019-12-26 20:48:46,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:46,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419148062] [2019-12-26 20:48:46,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992388977] [2019-12-26 20:48:46,948 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:47,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:47,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:47,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:47,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:47,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:47,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:47,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043946838] [2019-12-26 20:48:47,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:47,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:47,238 INFO L87 Difference]: Start difference. First operand 135 states and 326 transitions. Second operand 18 states. [2019-12-26 20:48:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:47,934 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-26 20:48:47,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:47,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:47,937 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:48:47,937 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:48:47,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:48:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2019-12-26 20:48:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:47,942 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:47,942 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:47,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:47,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:47,943 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:48,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:48,144 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 81 times [2019-12-26 20:48:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:48,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405518976] [2019-12-26 20:48:48,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:48,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405518976] [2019-12-26 20:48:48,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310108090] [2019-12-26 20:48:48,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:48,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:48:48,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:48,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:48,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:48,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:48,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:48,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278025929] [2019-12-26 20:48:48,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:48,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:48,527 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:49,291 INFO L93 Difference]: Finished difference Result 224 states and 486 transitions. [2019-12-26 20:48:49,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:48:49,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:49,293 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:48:49,293 INFO L226 Difference]: Without dead ends: 222 [2019-12-26 20:48:49,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:48:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-26 20:48:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 134. [2019-12-26 20:48:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:49,297 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:49,297 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:49,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:49,298 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:49,298 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:49,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:49,500 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 82 times [2019-12-26 20:48:49,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:49,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430311824] [2019-12-26 20:48:49,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:49,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430311824] [2019-12-26 20:48:49,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799838617] [2019-12-26 20:48:49,588 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:49,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:49,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:49,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:49,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:51,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:51,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:51,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368790988] [2019-12-26 20:48:51,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:51,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:51,908 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:49:05,111 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:49:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:07,213 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2019-12-26 20:49:07,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:07,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:07,215 INFO L225 Difference]: With dead ends: 210 [2019-12-26 20:49:07,215 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:49:07,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=275, Invalid=715, Unknown=2, NotChecked=0, Total=992 [2019-12-26 20:49:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:49:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2019-12-26 20:49:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:49:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-26 20:49:07,218 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-26 20:49:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:07,219 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-26 20:49:07,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-26 20:49:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:07,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:07,219 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:07,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:07,420 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 83 times [2019-12-26 20:49:07,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:07,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363336501] [2019-12-26 20:49:07,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:07,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363336501] [2019-12-26 20:49:07,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435920127] [2019-12-26 20:49:07,537 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:07,578 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:49:07,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:07,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:07,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:07,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:07,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:07,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553086398] [2019-12-26 20:49:07,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:07,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:07,697 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-26 20:49:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:08,052 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2019-12-26 20:49:08,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:49:08,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:08,054 INFO L225 Difference]: With dead ends: 166 [2019-12-26 20:49:08,054 INFO L226 Difference]: Without dead ends: 165 [2019-12-26 20:49:08,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:49:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-26 20:49:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2019-12-26 20:49:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:49:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 313 transitions. [2019-12-26 20:49:08,057 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 313 transitions. Word has length 14 [2019-12-26 20:49:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:08,057 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 313 transitions. [2019-12-26 20:49:08,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 313 transitions. [2019-12-26 20:49:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:08,058 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:08,058 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:08,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:08,259 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 84 times [2019-12-26 20:49:08,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:08,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279520380] [2019-12-26 20:49:08,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:08,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279520380] [2019-12-26 20:49:08,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003681569] [2019-12-26 20:49:08,347 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:08,390 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:49:08,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:08,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:08,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:08,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:08,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:08,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712543759] [2019-12-26 20:49:08,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:08,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:08,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:08,521 INFO L87 Difference]: Start difference. First operand 134 states and 313 transitions. Second operand 18 states. [2019-12-26 20:49:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:09,107 INFO L93 Difference]: Finished difference Result 200 states and 423 transitions. [2019-12-26 20:49:09,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:09,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:09,109 INFO L225 Difference]: With dead ends: 200 [2019-12-26 20:49:09,110 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:49:09,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:49:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:49:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2019-12-26 20:49:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-26 20:49:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 309 transitions. [2019-12-26 20:49:09,113 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 309 transitions. Word has length 14 [2019-12-26 20:49:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:09,113 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 309 transitions. [2019-12-26 20:49:09,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 309 transitions. [2019-12-26 20:49:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:09,114 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:09,114 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:09,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:09,315 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 85 times [2019-12-26 20:49:09,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:09,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829299067] [2019-12-26 20:49:09,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:09,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829299067] [2019-12-26 20:49:09,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576128865] [2019-12-26 20:49:09,394 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:09,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:09,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:09,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:09,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:09,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633429631] [2019-12-26 20:49:09,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:09,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:09,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:09,562 INFO L87 Difference]: Start difference. First operand 133 states and 309 transitions. Second operand 18 states. [2019-12-26 20:49:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:10,111 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2019-12-26 20:49:10,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:10,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:10,114 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:49:10,114 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:49:10,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:49:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:49:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2019-12-26 20:49:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:49:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-26 20:49:10,118 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-26 20:49:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:10,119 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-26 20:49:10,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-26 20:49:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:10,119 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:10,119 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:10,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:10,322 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 86 times [2019-12-26 20:49:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:10,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976127499] [2019-12-26 20:49:10,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:10,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976127499] [2019-12-26 20:49:10,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268434185] [2019-12-26 20:49:10,430 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:10,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:10,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:10,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:10,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:13,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:13,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:13,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83349993] [2019-12-26 20:49:13,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:13,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:13,534 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-26 20:49:13,973 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-26 20:49:15,308 WARN L192 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-26 20:49:16,293 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-26 20:49:16,589 WARN L192 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-26 20:49:17,198 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-26 20:49:17,635 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-26 20:49:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:18,629 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2019-12-26 20:49:18,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:49:18,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:18,632 INFO L225 Difference]: With dead ends: 228 [2019-12-26 20:49:18,632 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:49:18,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=418, Invalid=1059, Unknown=5, NotChecked=0, Total=1482 [2019-12-26 20:49:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:49:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 132. [2019-12-26 20:49:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-26 20:49:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 308 transitions. [2019-12-26 20:49:18,636 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 308 transitions. Word has length 14 [2019-12-26 20:49:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:18,637 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 308 transitions. [2019-12-26 20:49:18,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 308 transitions. [2019-12-26 20:49:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:18,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:18,637 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:18,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:18,841 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 87 times [2019-12-26 20:49:18,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:18,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644819475] [2019-12-26 20:49:18,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:18,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644819475] [2019-12-26 20:49:18,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784111416] [2019-12-26 20:49:18,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:18,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:49:18,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:18,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:18,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:30,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:30,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:30,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814173752] [2019-12-26 20:49:30,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:30,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=228, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:30,055 INFO L87 Difference]: Start difference. First operand 132 states and 308 transitions. Second operand 18 states. [2019-12-26 20:49:36,166 WARN L192 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-26 20:49:37,322 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2019-12-26 20:49:37,506 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-12-26 20:49:41,382 WARN L192 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-26 20:49:45,444 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:49:45,886 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-26 20:49:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:49,978 INFO L93 Difference]: Finished difference Result 225 states and 481 transitions. [2019-12-26 20:49:49,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:49:49,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:49,979 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:49:49,980 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:49:49,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=342, Invalid=837, Unknown=11, NotChecked=0, Total=1190 [2019-12-26 20:49:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:49:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 129. [2019-12-26 20:49:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:49:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-26 20:49:49,984 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-26 20:49:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:49,984 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-26 20:49:49,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-26 20:49:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:49,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:49,984 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:50,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:50,185 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 88 times [2019-12-26 20:49:50,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:50,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307465013] [2019-12-26 20:49:50,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:50,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307465013] [2019-12-26 20:49:50,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171775667] [2019-12-26 20:49:50,280 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:50,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:50,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:50,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:50,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:52,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:52,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:52,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037556559] [2019-12-26 20:49:52,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:52,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:52,229 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-26 20:49:52,572 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-26 20:49:54,248 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-12-26 20:49:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:56,065 INFO L93 Difference]: Finished difference Result 227 states and 480 transitions. [2019-12-26 20:49:56,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:56,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:56,066 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:49:56,066 INFO L226 Difference]: Without dead ends: 225 [2019-12-26 20:49:56,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-26 20:49:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2019-12-26 20:49:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-26 20:49:56,069 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-26 20:49:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:56,070 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-26 20:49:56,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-26 20:49:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:56,070 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:56,070 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:56,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:56,274 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 89 times [2019-12-26 20:49:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:56,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728784278] [2019-12-26 20:49:56,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:56,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728784278] [2019-12-26 20:49:56,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437148861] [2019-12-26 20:49:56,359 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:56,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:56,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:56,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:56,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:57,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:57,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:57,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876612840] [2019-12-26 20:49:57,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:57,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:57,986 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-26 20:49:58,431 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-12-26 20:49:59,200 WARN L192 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:50:01,052 WARN L192 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-26 20:50:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:01,281 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2019-12-26 20:50:01,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:50:01,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:01,282 INFO L225 Difference]: With dead ends: 232 [2019-12-26 20:50:01,282 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:50:01,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=319, Invalid=802, Unknown=1, NotChecked=0, Total=1122 [2019-12-26 20:50:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:50:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2019-12-26 20:50:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:50:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-26 20:50:01,286 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-26 20:50:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:01,286 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-26 20:50:01,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-26 20:50:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:01,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:01,287 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:01,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:01,490 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 90 times [2019-12-26 20:50:01,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:01,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712584381] [2019-12-26 20:50:01,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:01,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712584381] [2019-12-26 20:50:01,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499613402] [2019-12-26 20:50:01,578 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:01,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:50:01,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:01,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:50:01,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:01,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:01,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:01,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466005320] [2019-12-26 20:50:01,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:01,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:01,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:01,804 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-26 20:50:03,114 WARN L192 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:50:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:03,229 INFO L93 Difference]: Finished difference Result 226 states and 482 transitions. [2019-12-26 20:50:03,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:50:03,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:03,231 INFO L225 Difference]: With dead ends: 226 [2019-12-26 20:50:03,231 INFO L226 Difference]: Without dead ends: 224 [2019-12-26 20:50:03,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:50:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-26 20:50:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2019-12-26 20:50:03,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:50:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-26 20:50:03,235 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 14 [2019-12-26 20:50:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:03,235 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-26 20:50:03,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-26 20:50:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:03,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:03,236 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:03,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:03,437 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 91 times [2019-12-26 20:50:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:03,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973807819] [2019-12-26 20:50:03,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:03,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973807819] [2019-12-26 20:50:03,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894305816] [2019-12-26 20:50:03,539 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 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 [2019-12-26 20:50:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:03,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:50:03,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:03,983 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:50:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:04,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:04,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:04,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369750590] [2019-12-26 20:50:04,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:04,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:50:04,616 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 18 states. [2019-12-26 20:50:05,685 WARN L192 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 Received shutdown request... [2019-12-26 20:50:06,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:50:06,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:06,401 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-26 20:50:06,406 WARN L227 ceAbstractionStarter]: Timeout [2019-12-26 20:50:06,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:50:06 BasicIcfg [2019-12-26 20:50:06,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:50:06,407 INFO L168 Benchmark]: Toolchain (without parser) took 285919.00 ms. Allocated memory was 135.3 MB in the beginning and 275.8 MB in the end (delta: 140.5 MB). Free memory was 97.5 MB in the beginning and 242.3 MB in the end (delta: -144.8 MB). Peak memory consumption was 175.2 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,408 INFO L168 Benchmark]: CDTParser took 1.42 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.41 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 97.3 MB in the beginning and 159.6 MB in the end (delta: -62.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.17 ms. Allocated memory is still 200.3 MB. Free memory was 158.9 MB in the beginning and 157.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,409 INFO L168 Benchmark]: Boogie Preprocessor took 26.23 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 155.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,409 INFO L168 Benchmark]: RCFGBuilder took 442.07 ms. Allocated memory is still 200.3 MB. Free memory was 155.3 MB in the beginning and 136.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,409 INFO L168 Benchmark]: TraceAbstraction took 284758.28 ms. Allocated memory was 200.3 MB in the beginning and 275.8 MB in the end (delta: 75.5 MB). Free memory was 135.4 MB in the beginning and 242.3 MB in the end (delta: -106.9 MB). Peak memory consumption was 148.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,411 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.42 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 641.41 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 97.3 MB in the beginning and 159.6 MB in the end (delta: -62.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.17 ms. Allocated memory is still 200.3 MB. Free memory was 158.9 MB in the beginning and 157.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.23 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 155.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.07 ms. Allocated memory is still 200.3 MB. Free memory was 155.3 MB in the beginning and 136.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 284758.28 ms. Allocated memory was 200.3 MB in the beginning and 275.8 MB in the end (delta: 75.5 MB). Free memory was 135.4 MB in the beginning and 242.3 MB in the end (delta: -106.9 MB). Peak memory consumption was 148.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 441 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 695 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (137states) and FLOYD_HOARE automaton (currently 18 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 31 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 284.6s, OverallIterations: 107, TraceHistogramMax: 8, AutomataDifference: 162.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 962 SDtfs, 19577 SDslu, 9527 SDs, 0 SdLazy, 5315 SolverSat, 3251 SolverUnsat, 26 SolverUnknown, 0 SolverNotchecked, 45.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3004 GetRequests, 497 SyntacticMatches, 6 SemanticMatches, 2500 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 13601 ImplicationChecksByTransitivity, 205.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 106 MinimizatonAttempts, 5129 StatesRemovedByMinimization, 105 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 93.2s InterpolantComputationTime, 2615 NumberOfCodeBlocks, 2615 NumberOfCodeBlocksAsserted, 341 NumberOfCheckSat, 2406 ConstructedInterpolants, 103 QuantifiedInterpolants, 359378 SizeOfPredicates, 0 NumberOfNonLiveVariables, 9390 ConjunctsInSsa, 1098 ConjunctsInUnsatCore, 209 InterpolantComputations, 5 PerfectInterpolantSequences, 0/1578 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