/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:45:26,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:45:26,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:45:26,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:45:26,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:45:26,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:45:26,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:45:26,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:45:26,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:45:26,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:45:26,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:45:26,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:45:26,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:45:26,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:45:26,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:45:26,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:45:26,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:45:26,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:45:26,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:45:26,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:45:26,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:45:26,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:45:26,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:45:26,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:45:26,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:45:26,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:45:26,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:45:26,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:45:26,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:45:26,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:45:26,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:45:26,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:45:26,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:45:26,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:45:26,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:45:26,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:45:26,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:45:26,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:45:26,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:45:26,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:45:26,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:45:26,329 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 20:45:26,356 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:45:26,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:45:26,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:45:26,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:45:26,357 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:45:26,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:45:26,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:45:26,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:45:26,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:45:26,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:45:26,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:45:26,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:45:26,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:45:26,360 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:45:26,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:45:26,360 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:45:26,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:45:26,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:45:26,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:45:26,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:45:26,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:45:26,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:45:26,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:45:26,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:45:26,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:45:26,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:45:26,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:45:26,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:45:26,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:45:26,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:45:26,618 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:45:26,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:45:26,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:45:26,635 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:45:26,636 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:45:26,636 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-26 20:45:26,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb1b272c/d1d2a54d5f66480f96e455be87bedc0d/FLAGa38faa561 [2019-12-26 20:45:27,227 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:45:27,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-26 20:45:27,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb1b272c/d1d2a54d5f66480f96e455be87bedc0d/FLAGa38faa561 [2019-12-26 20:45:27,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb1b272c/d1d2a54d5f66480f96e455be87bedc0d [2019-12-26 20:45:27,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:45:27,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:45:27,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:27,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:45:27,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:45:27,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:27" (1/1) ... [2019-12-26 20:45:27,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc25d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:27, skipping insertion in model container [2019-12-26 20:45:27,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:27" (1/1) ... [2019-12-26 20:45:27,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:45:27,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:45:28,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:28,104 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:45:28,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:28,240 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:45:28,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28 WrapperNode [2019-12-26 20:45:28,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:28,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:28,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:45:28,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:45:28,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:28,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:45:28,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:45:28,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:45:28,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (1/1) ... [2019-12-26 20:45:28,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:45:28,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:45:28,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:45:28,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:45:28,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (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 20:45:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:45:28,387 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:45:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:45:28,387 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:45:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:45:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:45:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:45:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:45:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:45:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:45:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:45:28,391 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 20:45:28,730 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:45:28,730 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:45:28,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:28 BoogieIcfgContainer [2019-12-26 20:45:28,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:45:28,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:45:28,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:45:28,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:45:28,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:45:27" (1/3) ... [2019-12-26 20:45:28,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93a45ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:28, skipping insertion in model container [2019-12-26 20:45:28,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:28" (2/3) ... [2019-12-26 20:45:28,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93a45ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:28, skipping insertion in model container [2019-12-26 20:45:28,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:28" (3/3) ... [2019-12-26 20:45:28,739 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2019-12-26 20:45:28,750 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:45:28,750 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:45:28,756 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:45:28,757 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:45:28,782 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,782 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,782 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,783 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,783 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,784 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,784 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,784 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,785 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,785 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,785 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,786 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,786 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,786 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,786 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,787 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,787 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,787 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,788 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,788 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,788 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,788 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,789 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,789 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,789 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,790 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,790 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,790 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,790 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,791 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,795 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,795 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,795 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,796 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,796 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,796 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,802 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,802 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,803 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,803 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,803 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,803 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:28,825 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:45:28,846 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:45:28,847 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:45:28,847 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:45:28,848 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:45:28,848 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:45:28,848 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:45:28,848 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:45:28,849 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:45:28,864 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-26 20:45:28,866 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:28,924 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:28,924 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:28,931 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 20:45:28,935 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:28,951 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:28,952 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:28,953 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 20:45:28,955 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-26 20:45:28,956 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:45:30,150 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-26 20:45:30,283 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-26 20:45:30,284 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-26 20:45:30,288 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:45:30,298 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:45:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:45:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:45:30,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,308 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:45:30,308 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-26 20:45:30,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293608025] [2019-12-26 20:45:30,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,543 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 20:45:30,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293608025] [2019-12-26 20:45:30,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:30,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:45:30,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934287881] [2019-12-26 20:45:30,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:45:30,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:45:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:30,574 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:45:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,624 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-26 20:45:30,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:45:30,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:45:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,655 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:30,655 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:45:30,659 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 20:45:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:45:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:45:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:45:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-26 20:45:30,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-26 20:45:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,710 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-26 20:45:30,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:45:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-26 20:45:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:30,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,715 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,723 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-26 20:45:30,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123168536] [2019-12-26 20:45:30,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,857 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 20:45:30,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123168536] [2019-12-26 20:45:30,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:30,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:30,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028303868] [2019-12-26 20:45:30,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:30,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:30,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:30,861 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-26 20:45:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,888 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-26 20:45:30,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:30,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,890 INFO L225 Difference]: With dead ends: 46 [2019-12-26 20:45:30,890 INFO L226 Difference]: Without dead ends: 45 [2019-12-26 20:45:30,891 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 20:45:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-26 20:45:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-26 20:45:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-26 20:45:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-26 20:45:30,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-26 20:45:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,899 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-26 20:45:30,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-26 20:45:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:30,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,901 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,901 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-26 20:45:30,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657842028] [2019-12-26 20:45:30,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657842028] [2019-12-26 20:45:30,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:30,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:30,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735687813] [2019-12-26 20:45:30,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:30,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:30,965 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-26 20:45:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,995 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-26 20:45:30,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:30,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,997 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:45:30,997 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:45:30,998 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 20:45:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:45:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-26 20:45:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-26 20:45:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-26 20:45:31,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-26 20:45:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,006 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-26 20:45:31,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-26 20:45:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:31,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,007 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,007 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-26 20:45:31,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116386248] [2019-12-26 20:45:31,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,094 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 20:45:31,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116386248] [2019-12-26 20:45:31,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462063706] [2019-12-26 20:45:31,095 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 20:45:31,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:31,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,228 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 20:45:31,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879540954] [2019-12-26 20:45:31,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:31,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:31,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:31,231 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-26 20:45:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,299 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-26 20:45:31,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:31,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,301 INFO L225 Difference]: With dead ends: 60 [2019-12-26 20:45:31,301 INFO L226 Difference]: Without dead ends: 59 [2019-12-26 20:45:31,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-26 20:45:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-26 20:45:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:45:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-26 20:45:31,318 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-26 20:45:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,318 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-26 20:45:31,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-26 20:45:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:31,319 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,319 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,531 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-26 20:45:31,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730274263] [2019-12-26 20:45:31,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,618 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 20:45:31,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730274263] [2019-12-26 20:45:31,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342960996] [2019-12-26 20:45:31,620 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 20:45:31,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:31,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,707 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 20:45:31,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:31,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593859951] [2019-12-26 20:45:31,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:31,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:31,709 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 8 states. [2019-12-26 20:45:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,768 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-26 20:45:31,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:31,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,770 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:45:31,770 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:45:31,773 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 20:45:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:45:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-26 20:45:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:45:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-26 20:45:31,786 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-26 20:45:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,786 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-26 20:45:31,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-26 20:45:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:31,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,787 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-26 20:45:31,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289755152] [2019-12-26 20:45:31,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,089 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 20:45:32,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289755152] [2019-12-26 20:45:32,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482676367] [2019-12-26 20:45:32,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:45:32,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:32,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,199 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 20:45:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:32,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696473420] [2019-12-26 20:45:32,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:32,201 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-26 20:45:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,269 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-26 20:45:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:32,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,271 INFO L225 Difference]: With dead ends: 72 [2019-12-26 20:45:32,271 INFO L226 Difference]: Without dead ends: 71 [2019-12-26 20:45:32,271 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 20:45:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-26 20:45:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-26 20:45:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:45:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-26 20:45:32,279 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-26 20:45:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,279 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-26 20:45:32,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-26 20:45:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:32,280 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,280 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,484 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-26 20:45:32,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017286937] [2019-12-26 20:45:32,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,552 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 20:45:32,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017286937] [2019-12-26 20:45:32,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:32,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:32,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592249651] [2019-12-26 20:45:32,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:32,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:32,555 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-26 20:45:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,597 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-26 20:45:32,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:32,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,599 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:45:32,599 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:45:32,599 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 20:45:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:45:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-26 20:45:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-26 20:45:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-26 20:45:32,606 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-26 20:45:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,607 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-26 20:45:32,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-26 20:45:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:32,608 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,608 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,609 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-26 20:45:32,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441783833] [2019-12-26 20:45:32,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,668 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 20:45:32,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441783833] [2019-12-26 20:45:32,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:32,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:32,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014683277] [2019-12-26 20:45:32,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:32,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:32,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:32,671 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-26 20:45:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,711 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-26 20:45:32,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:32,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,712 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:45:32,713 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:45:32,713 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 20:45:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:45:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-26 20:45:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-26 20:45:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-26 20:45:32,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-26 20:45:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,719 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-26 20:45:32,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-26 20:45:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:32,720 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,720 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,721 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-26 20:45:32,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331126109] [2019-12-26 20:45:32,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,794 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 20:45:32,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331126109] [2019-12-26 20:45:32,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468484887] [2019-12-26 20:45:32,795 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 20:45:32,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:32,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,913 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 20:45:32,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:32,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275612973] [2019-12-26 20:45:32,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:32,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:32,915 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 10 states. [2019-12-26 20:45:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,010 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-26 20:45:33,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:33,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,011 INFO L225 Difference]: With dead ends: 75 [2019-12-26 20:45:33,012 INFO L226 Difference]: Without dead ends: 74 [2019-12-26 20:45:33,012 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 20:45:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-26 20:45:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-26 20:45:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-26 20:45:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-26 20:45:33,029 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-26 20:45:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,029 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-26 20:45:33,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-26 20:45:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:33,030 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,030 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,235 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-26 20:45:33,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825726010] [2019-12-26 20:45:33,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,325 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 20:45:33,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825726010] [2019-12-26 20:45:33,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645475318] [2019-12-26 20:45:33,327 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 20:45:33,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:33,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,470 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 20:45:33,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173836869] [2019-12-26 20:45:33,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,472 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-26 20:45:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,571 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-26 20:45:33,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:33,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,574 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:45:33,574 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:45:33,575 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 20:45:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:45:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-26 20:45:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-26 20:45:33,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-26 20:45:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,590 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-26 20:45:33,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-26 20:45:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:33,596 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,596 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,806 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-26 20:45:33,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704447316] [2019-12-26 20:45:33,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,873 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 20:45:33,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704447316] [2019-12-26 20:45:33,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885202194] [2019-12-26 20:45:33,874 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 20:45:33,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:33,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,997 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 20:45:33,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:33,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798932730] [2019-12-26 20:45:33,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:33,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:33,999 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-26 20:45:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,060 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-26 20:45:34,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:34,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,061 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:34,061 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:34,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2019-12-26 20:45:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-26 20:45:34,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-26 20:45:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,067 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-26 20:45:34,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-26 20:45:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:34,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,068 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,278 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-26 20:45:34,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608814345] [2019-12-26 20:45:34,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,342 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 20:45:34,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608814345] [2019-12-26 20:45:34,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137311113] [2019-12-26 20:45:34,343 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 20:45:34,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:34,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,436 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 20:45:34,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:34,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943540863] [2019-12-26 20:45:34,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:34,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:34,438 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 10 states. [2019-12-26 20:45:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,519 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-26 20:45:34,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:34,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,520 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:34,520 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:34,520 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 20:45:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-12-26 20:45:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-26 20:45:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-26 20:45:34,525 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-26 20:45:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,526 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-26 20:45:34,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-26 20:45:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:34,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,527 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,731 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-26 20:45:34,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969715380] [2019-12-26 20:45:34,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,794 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 20:45:34,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969715380] [2019-12-26 20:45:34,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610337867] [2019-12-26 20:45:34,795 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 20:45:34,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:34,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,890 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 20:45:34,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:34,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125699922] [2019-12-26 20:45:34,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:34,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:34,892 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 10 states. [2019-12-26 20:45:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,990 INFO L93 Difference]: Finished difference Result 98 states and 202 transitions. [2019-12-26 20:45:34,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:34,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,992 INFO L225 Difference]: With dead ends: 98 [2019-12-26 20:45:34,993 INFO L226 Difference]: Without dead ends: 96 [2019-12-26 20:45:34,993 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 20:45:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-26 20:45:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2019-12-26 20:45:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:45:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-26 20:45:34,998 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-26 20:45:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,998 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-26 20:45:34,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-26 20:45:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:34,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,000 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,208 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 6 times [2019-12-26 20:45:35,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733488921] [2019-12-26 20:45:35,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,269 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 20:45:35,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733488921] [2019-12-26 20:45:35,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991584319] [2019-12-26 20:45:35,269 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 20:45:35,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:35,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,366 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 20:45:35,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:35,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959858774] [2019-12-26 20:45:35,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:35,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:35,368 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 10 states. [2019-12-26 20:45:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,488 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2019-12-26 20:45:35,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:35,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,490 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:35,490 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:35,491 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 20:45:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2019-12-26 20:45:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:45:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-26 20:45:35,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-26 20:45:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,495 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-26 20:45:35,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-26 20:45:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:35,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,496 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,704 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-26 20:45:35,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480905039] [2019-12-26 20:45:35,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,792 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 20:45:35,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480905039] [2019-12-26 20:45:35,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833410736] [2019-12-26 20:45:35,793 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 20:45:35,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:35,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,028 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 20:45:36,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:36,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171466847] [2019-12-26 20:45:36,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:36,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:36,031 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 12 states. [2019-12-26 20:45:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,162 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-26 20:45:36,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:36,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,164 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:36,164 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:36,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-26 20:45:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:45:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-26 20:45:36,175 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-26 20:45:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,178 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-26 20:45:36,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-26 20:45:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,180 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,387 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-26 20:45:36,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687787939] [2019-12-26 20:45:36,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,487 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 20:45:36,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687787939] [2019-12-26 20:45:36,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742942536] [2019-12-26 20:45:36,488 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 20:45:36,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:36,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:36,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,687 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 20:45:36,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:36,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272337512] [2019-12-26 20:45:36,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:36,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:36,690 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-26 20:45:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,852 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-26 20:45:36,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:36,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,855 INFO L225 Difference]: With dead ends: 101 [2019-12-26 20:45:36,855 INFO L226 Difference]: Without dead ends: 100 [2019-12-26 20:45:36,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-26 20:45:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-26 20:45:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-26 20:45:36,862 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-26 20:45:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,863 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-26 20:45:36,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-26 20:45:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,864 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,865 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,076 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 7 times [2019-12-26 20:45:37,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062495871] [2019-12-26 20:45:37,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,135 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 20:45:37,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062495871] [2019-12-26 20:45:37,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752171126] [2019-12-26 20:45:37,136 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 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 20:45:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,305 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 20:45:37,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:37,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578845811] [2019-12-26 20:45:37,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,308 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-26 20:45:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,454 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2019-12-26 20:45:37,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:37,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,456 INFO L225 Difference]: With dead ends: 108 [2019-12-26 20:45:37,456 INFO L226 Difference]: Without dead ends: 107 [2019-12-26 20:45:37,456 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 20:45:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-26 20:45:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-26 20:45:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-26 20:45:37,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-26 20:45:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,461 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-26 20:45:37,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-26 20:45:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:37,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,462 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,668 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 8 times [2019-12-26 20:45:37,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292961867] [2019-12-26 20:45:37,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,742 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 20:45:37,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292961867] [2019-12-26 20:45:37,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944320166] [2019-12-26 20:45:37,743 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 20:45:37,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:37,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:37,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15931871] [2019-12-26 20:45:37,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,883 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 12 states. [2019-12-26 20:45:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,063 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2019-12-26 20:45:38,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:38,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,069 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:38,069 INFO L226 Difference]: Without dead ends: 110 [2019-12-26 20:45:38,070 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 20:45:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-26 20:45:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2019-12-26 20:45:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-26 20:45:38,074 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-26 20:45:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,074 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-26 20:45:38,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-26 20:45:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:38,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,075 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,278 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 9 times [2019-12-26 20:45:38,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020454481] [2019-12-26 20:45:38,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,344 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 20:45:38,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020454481] [2019-12-26 20:45:38,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922504889] [2019-12-26 20:45:38,344 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 20:45:38,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:38,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:38,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292623954] [2019-12-26 20:45:38,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:38,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:38,525 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-26 20:45:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,694 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-26 20:45:38,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:38,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,695 INFO L225 Difference]: With dead ends: 113 [2019-12-26 20:45:38,696 INFO L226 Difference]: Without dead ends: 112 [2019-12-26 20:45:38,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-12-26 20:45:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2019-12-26 20:45:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-26 20:45:38,699 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-26 20:45:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,700 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-26 20:45:38,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-26 20:45:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:38,700 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,700 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,901 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 10 times [2019-12-26 20:45:38,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565137402] [2019-12-26 20:45:38,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,960 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 20:45:38,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565137402] [2019-12-26 20:45:38,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788631319] [2019-12-26 20:45:38,960 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 20:45:39,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:39,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:39,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556500987] [2019-12-26 20:45:39,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:39,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:39,109 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 12 states. [2019-12-26 20:45:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,277 INFO L93 Difference]: Finished difference Result 119 states and 249 transitions. [2019-12-26 20:45:39,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:39,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,279 INFO L225 Difference]: With dead ends: 119 [2019-12-26 20:45:39,279 INFO L226 Difference]: Without dead ends: 117 [2019-12-26 20:45:39,280 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 20:45:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-26 20:45:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2019-12-26 20:45:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-26 20:45:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-26 20:45:39,284 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-26 20:45:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,285 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-26 20:45:39,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-26 20:45:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:39,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,285 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,489 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 11 times [2019-12-26 20:45:39,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825706244] [2019-12-26 20:45:39,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,545 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 20:45:39,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825706244] [2019-12-26 20:45:39,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267494844] [2019-12-26 20:45:39,546 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 20:45:39,602 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:39,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,703 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 20:45:39,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:39,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525334917] [2019-12-26 20:45:39,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:39,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:39,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:39,705 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,849 INFO L93 Difference]: Finished difference Result 123 states and 256 transitions. [2019-12-26 20:45:39,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:39,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,851 INFO L225 Difference]: With dead ends: 123 [2019-12-26 20:45:39,851 INFO L226 Difference]: Without dead ends: 121 [2019-12-26 20:45:39,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-26 20:45:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2019-12-26 20:45:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-26 20:45:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-26 20:45:39,856 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-26 20:45:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,857 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-26 20:45:39,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-26 20:45:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:39,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,858 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,062 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 12 times [2019-12-26 20:45:40,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166220496] [2019-12-26 20:45:40,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,155 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 20:45:40,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166220496] [2019-12-26 20:45:40,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595974324] [2019-12-26 20:45:40,156 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 20:45:40,229 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:40,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:40,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:40,296 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 20:45:40,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:40,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:40,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590521942] [2019-12-26 20:45:40,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:40,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:40,298 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 12 states. [2019-12-26 20:45:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:40,468 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2019-12-26 20:45:40,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:40,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:40,475 INFO L225 Difference]: With dead ends: 121 [2019-12-26 20:45:40,475 INFO L226 Difference]: Without dead ends: 119 [2019-12-26 20:45:40,475 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 20:45:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-26 20:45:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2019-12-26 20:45:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-26 20:45:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 200 transitions. [2019-12-26 20:45:40,479 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 200 transitions. Word has length 11 [2019-12-26 20:45:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:40,480 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 200 transitions. [2019-12-26 20:45:40,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 200 transitions. [2019-12-26 20:45:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:40,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:40,480 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:40,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:40,687 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 13 times [2019-12-26 20:45:40,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:40,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495522190] [2019-12-26 20:45:40,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,757 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 20:45:40,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495522190] [2019-12-26 20:45:40,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325045121] [2019-12-26 20:45:40,758 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 20:45:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:40,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:40,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:40,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:40,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:40,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024875853] [2019-12-26 20:45:40,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:40,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:40,883 INFO L87 Difference]: Start difference. First operand 90 states and 200 transitions. Second operand 12 states. [2019-12-26 20:45:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:41,060 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-26 20:45:41,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:41,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:41,061 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:41,062 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:41,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-26 20:45:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-26 20:45:41,066 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-26 20:45:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:41,066 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-26 20:45:41,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-26 20:45:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:41,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:41,067 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:41,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:41,270 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-26 20:45:41,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:41,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796301829] [2019-12-26 20:45:41,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:41,340 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 20:45:41,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796301829] [2019-12-26 20:45:41,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138616399] [2019-12-26 20:45:41,341 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 20:45:41,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:41,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:41,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:41,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:41,536 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 20:45:41,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:41,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:41,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470093786] [2019-12-26 20:45:41,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:41,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:41,539 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 14 states. [2019-12-26 20:45:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:41,856 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-26 20:45:41,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:41,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:41,857 INFO L225 Difference]: With dead ends: 105 [2019-12-26 20:45:41,858 INFO L226 Difference]: Without dead ends: 104 [2019-12-26 20:45:41,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-26 20:45:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-26 20:45:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-26 20:45:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-26 20:45:41,862 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-26 20:45:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:41,862 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-26 20:45:41,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-26 20:45:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:41,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:41,863 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,069 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-26 20:45:42,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712633385] [2019-12-26 20:45:42,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,141 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 20:45:42,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712633385] [2019-12-26 20:45:42,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251941806] [2019-12-26 20:45:42,141 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 20:45:42,192 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:42,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:42,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:42,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659262201] [2019-12-26 20:45:42,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:42,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:42,332 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-26 20:45:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:42,489 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-26 20:45:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:42,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:45:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:42,491 INFO L225 Difference]: With dead ends: 116 [2019-12-26 20:45:42,491 INFO L226 Difference]: Without dead ends: 115 [2019-12-26 20:45:42,492 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 20:45:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-26 20:45:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-26 20:45:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:42,496 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:42,497 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:42,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:42,498 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:42,498 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,701 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 14 times [2019-12-26 20:45:42,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828965906] [2019-12-26 20:45:42,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,778 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 20:45:42,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828965906] [2019-12-26 20:45:42,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954361592] [2019-12-26 20:45:42,779 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 20:45:42,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:42,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:42,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,920 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 20:45:42,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:42,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614333275] [2019-12-26 20:45:42,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:42,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:42,924 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,042 INFO L93 Difference]: Finished difference Result 124 states and 264 transitions. [2019-12-26 20:45:43,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:43,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,043 INFO L225 Difference]: With dead ends: 124 [2019-12-26 20:45:43,044 INFO L226 Difference]: Without dead ends: 123 [2019-12-26 20:45:43,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:45:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-26 20:45:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2019-12-26 20:45:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:43,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,048 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:43,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,049 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:43,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:43,253 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 15 times [2019-12-26 20:45:43,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:43,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077977498] [2019-12-26 20:45:43,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:43,346 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 20:45:43,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077977498] [2019-12-26 20:45:43,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184045366] [2019-12-26 20:45:43,348 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 20:45:43,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:43,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:43,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:43,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:43,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:43,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212525726] [2019-12-26 20:45:43,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:43,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:43,549 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,813 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2019-12-26 20:45:43,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:43,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,815 INFO L225 Difference]: With dead ends: 134 [2019-12-26 20:45:43,815 INFO L226 Difference]: Without dead ends: 133 [2019-12-26 20:45:43,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-26 20:45:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2019-12-26 20:45:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:43,820 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,821 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:43,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,822 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,025 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 16 times [2019-12-26 20:45:44,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872314442] [2019-12-26 20:45:44,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,106 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 20:45:44,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872314442] [2019-12-26 20:45:44,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801886708] [2019-12-26 20:45:44,107 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 20:45:44,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:44,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,183 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 20:45:45,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280197954] [2019-12-26 20:45:45,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=131, Unknown=2, NotChecked=0, Total=182 [2019-12-26 20:45:45,185 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:45,413 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-26 20:45:46,072 WARN L192 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-26 20:45:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,440 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-26 20:45:46,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:46,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,441 INFO L225 Difference]: With dead ends: 140 [2019-12-26 20:45:46,442 INFO L226 Difference]: Without dead ends: 139 [2019-12-26 20:45:46,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=145, Invalid=315, Unknown=2, NotChecked=0, Total=462 [2019-12-26 20:45:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-26 20:45:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2019-12-26 20:45:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-26 20:45:46,446 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-26 20:45:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,447 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-26 20:45:46,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-26 20:45:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,448 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,651 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 17 times [2019-12-26 20:45:46,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124808894] [2019-12-26 20:45:46,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124808894] [2019-12-26 20:45:46,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140922835] [2019-12-26 20:45:46,726 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 20:45:46,769 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:46,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:46,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,868 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 20:45:46,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:46,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500003789] [2019-12-26 20:45:46,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:46,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:46,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:46,870 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 14 states. [2019-12-26 20:45:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,099 INFO L93 Difference]: Finished difference Result 133 states and 280 transitions. [2019-12-26 20:45:47,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:47,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,101 INFO L225 Difference]: With dead ends: 133 [2019-12-26 20:45:47,101 INFO L226 Difference]: Without dead ends: 131 [2019-12-26 20:45:47,102 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 20:45:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-26 20:45:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-26 20:45:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-26 20:45:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-26 20:45:47,106 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-26 20:45:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,106 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-26 20:45:47,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-26 20:45:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,107 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,310 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 18 times [2019-12-26 20:45:47,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112027726] [2019-12-26 20:45:47,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,400 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 20:45:47,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112027726] [2019-12-26 20:45:47,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990082468] [2019-12-26 20:45:47,401 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 20:45:47,453 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:47,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:47,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731970663] [2019-12-26 20:45:47,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:47,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:47,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:47,600 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,901 INFO L93 Difference]: Finished difference Result 148 states and 313 transitions. [2019-12-26 20:45:47,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:47,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,903 INFO L225 Difference]: With dead ends: 148 [2019-12-26 20:45:47,903 INFO L226 Difference]: Without dead ends: 146 [2019-12-26 20:45:47,903 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 20:45:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-26 20:45:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-12-26 20:45:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:47,908 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,908 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:47,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,909 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,909 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:48,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:48,113 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 19 times [2019-12-26 20:45:48,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:48,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710140568] [2019-12-26 20:45:48,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,181 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 20:45:48,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710140568] [2019-12-26 20:45:48,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862088892] [2019-12-26 20:45:48,182 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 20:45:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:48,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:48,399 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 20:45:48,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:48,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:48,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22315699] [2019-12-26 20:45:48,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:48,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:48,402 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:48,698 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2019-12-26 20:45:48,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:48,698 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:48,699 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:48,699 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:48,700 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 20:45:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2019-12-26 20:45:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2019-12-26 20:45:48,704 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 12 [2019-12-26 20:45:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:48,704 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2019-12-26 20:45:48,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2019-12-26 20:45:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:48,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:48,705 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:48,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:48,909 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 20 times [2019-12-26 20:45:48,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:48,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955256207] [2019-12-26 20:45:48,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,975 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 20:45:48,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955256207] [2019-12-26 20:45:48,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651072593] [2019-12-26 20:45:48,976 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 20:45:49,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:49,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,164 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 20:45:49,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:49,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123735591] [2019-12-26 20:45:49,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:49,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:49,165 INFO L87 Difference]: Start difference. First operand 104 states and 237 transitions. Second operand 14 states. [2019-12-26 20:45:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,454 INFO L93 Difference]: Finished difference Result 139 states and 294 transitions. [2019-12-26 20:45:49,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:49,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,456 INFO L225 Difference]: With dead ends: 139 [2019-12-26 20:45:49,456 INFO L226 Difference]: Without dead ends: 138 [2019-12-26 20:45:49,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-26 20:45:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2019-12-26 20:45:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-26 20:45:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-26 20:45:49,461 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-26 20:45:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,461 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-26 20:45:49,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-26 20:45:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:49,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,462 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,665 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 21 times [2019-12-26 20:45:49,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974373471] [2019-12-26 20:45:49,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,731 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 20:45:49,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974373471] [2019-12-26 20:45:49,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720907449] [2019-12-26 20:45:49,732 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 20:45:49,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:49,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,883 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 20:45:49,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:49,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231586820] [2019-12-26 20:45:49,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:49,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:49,884 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 14 states. [2019-12-26 20:45:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:50,218 INFO L93 Difference]: Finished difference Result 162 states and 334 transitions. [2019-12-26 20:45:50,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:45:50,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:50,220 INFO L225 Difference]: With dead ends: 162 [2019-12-26 20:45:50,220 INFO L226 Difference]: Without dead ends: 159 [2019-12-26 20:45:50,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-26 20:45:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 105. [2019-12-26 20:45:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-26 20:45:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 241 transitions. [2019-12-26 20:45:50,225 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 241 transitions. Word has length 12 [2019-12-26 20:45:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:50,226 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 241 transitions. [2019-12-26 20:45:50,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 241 transitions. [2019-12-26 20:45:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:50,226 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:50,226 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:50,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:50,430 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 22 times [2019-12-26 20:45:50,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:50,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587248592] [2019-12-26 20:45:50,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,536 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 20:45:50,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587248592] [2019-12-26 20:45:50,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599110339] [2019-12-26 20:45:50,537 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 20:45:50,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:50,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:50,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,758 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 20:45:50,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:50,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100745653] [2019-12-26 20:45:50,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:50,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:50,761 INFO L87 Difference]: Start difference. First operand 105 states and 241 transitions. Second operand 14 states. [2019-12-26 20:45:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,226 INFO L93 Difference]: Finished difference Result 151 states and 322 transitions. [2019-12-26 20:45:51,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:51,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,228 INFO L225 Difference]: With dead ends: 151 [2019-12-26 20:45:51,229 INFO L226 Difference]: Without dead ends: 149 [2019-12-26 20:45:51,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-26 20:45:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2019-12-26 20:45:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2019-12-26 20:45:51,235 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 12 [2019-12-26 20:45:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,235 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2019-12-26 20:45:51,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2019-12-26 20:45:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:51,237 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,237 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:51,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,442 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 23 times [2019-12-26 20:45:51,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:51,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736803892] [2019-12-26 20:45:51,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:51,536 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 20:45:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736803892] [2019-12-26 20:45:51,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722577981] [2019-12-26 20:45:51,537 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 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 20:45:51,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:51,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:51,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:51,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:51,672 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 20:45:51,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:51,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:51,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626389225] [2019-12-26 20:45:51,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:51,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:51,674 INFO L87 Difference]: Start difference. First operand 104 states and 237 transitions. Second operand 14 states. [2019-12-26 20:45:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,917 INFO L93 Difference]: Finished difference Result 160 states and 337 transitions. [2019-12-26 20:45:51,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:45:51,918 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,919 INFO L225 Difference]: With dead ends: 160 [2019-12-26 20:45:51,920 INFO L226 Difference]: Without dead ends: 158 [2019-12-26 20:45:51,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:45:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-26 20:45:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2019-12-26 20:45:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-26 20:45:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 249 transitions. [2019-12-26 20:45:51,924 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 249 transitions. Word has length 12 [2019-12-26 20:45:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,924 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 249 transitions. [2019-12-26 20:45:51,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 249 transitions. [2019-12-26 20:45:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:51,925 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,925 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,128 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 24 times [2019-12-26 20:45:52,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501561265] [2019-12-26 20:45:52,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,191 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 20:45:52,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501561265] [2019-12-26 20:45:52,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413180157] [2019-12-26 20:45:52,192 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 20:45:52,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:52,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:52,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,328 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 20:45:52,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143587041] [2019-12-26 20:45:52,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,329 INFO L87 Difference]: Start difference. First operand 107 states and 249 transitions. Second operand 14 states. [2019-12-26 20:45:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:52,561 INFO L93 Difference]: Finished difference Result 156 states and 333 transitions. [2019-12-26 20:45:52,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:52,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:52,563 INFO L225 Difference]: With dead ends: 156 [2019-12-26 20:45:52,563 INFO L226 Difference]: Without dead ends: 154 [2019-12-26 20:45:52,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-26 20:45:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2019-12-26 20:45:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-26 20:45:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 245 transitions. [2019-12-26 20:45:52,568 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 245 transitions. Word has length 12 [2019-12-26 20:45:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:52,568 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 245 transitions. [2019-12-26 20:45:52,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 245 transitions. [2019-12-26 20:45:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:52,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:52,569 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,773 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 25 times [2019-12-26 20:45:52,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852254117] [2019-12-26 20:45:52,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,838 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 20:45:52,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852254117] [2019-12-26 20:45:52,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974194574] [2019-12-26 20:45:52,839 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 20:45:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,965 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 20:45:52,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105671883] [2019-12-26 20:45:52,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,967 INFO L87 Difference]: Start difference. First operand 106 states and 245 transitions. Second operand 14 states. [2019-12-26 20:45:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:53,268 INFO L93 Difference]: Finished difference Result 152 states and 323 transitions. [2019-12-26 20:45:53,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:45:53,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:53,269 INFO L225 Difference]: With dead ends: 152 [2019-12-26 20:45:53,270 INFO L226 Difference]: Without dead ends: 150 [2019-12-26 20:45:53,270 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 20:45:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-26 20:45:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2019-12-26 20:45:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-26 20:45:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 245 transitions. [2019-12-26 20:45:53,275 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 245 transitions. Word has length 12 [2019-12-26 20:45:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:53,276 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 245 transitions. [2019-12-26 20:45:53,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 245 transitions. [2019-12-26 20:45:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:53,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:53,278 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:53,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:53,481 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 26 times [2019-12-26 20:45:53,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:53,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297868134] [2019-12-26 20:45:53,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:53,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297868134] [2019-12-26 20:45:53,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532808798] [2019-12-26 20:45:53,551 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 20:45:53,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:53,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:53,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:53,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:53,688 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 20:45:53,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:53,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:53,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141626235] [2019-12-26 20:45:53,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:53,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:53,690 INFO L87 Difference]: Start difference. First operand 106 states and 245 transitions. Second operand 14 states. [2019-12-26 20:45:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:53,985 INFO L93 Difference]: Finished difference Result 144 states and 308 transitions. [2019-12-26 20:45:53,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:53,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:53,987 INFO L225 Difference]: With dead ends: 144 [2019-12-26 20:45:53,987 INFO L226 Difference]: Without dead ends: 143 [2019-12-26 20:45:53,988 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 20:45:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-26 20:45:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 105. [2019-12-26 20:45:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-26 20:45:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 241 transitions. [2019-12-26 20:45:53,992 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 241 transitions. Word has length 12 [2019-12-26 20:45:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:53,993 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 241 transitions. [2019-12-26 20:45:53,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 241 transitions. [2019-12-26 20:45:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:53,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:53,994 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:54,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:54,197 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 27 times [2019-12-26 20:45:54,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:54,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228900793] [2019-12-26 20:45:54,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:54,263 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 20:45:54,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228900793] [2019-12-26 20:45:54,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922421095] [2019-12-26 20:45:54,264 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 20:45:54,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:54,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:54,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:54,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:54,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:54,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355645262] [2019-12-26 20:45:54,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:54,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:54,413 INFO L87 Difference]: Start difference. First operand 105 states and 241 transitions. Second operand 14 states. [2019-12-26 20:45:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:54,625 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-26 20:45:54,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:54,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:54,626 INFO L225 Difference]: With dead ends: 129 [2019-12-26 20:45:54,627 INFO L226 Difference]: Without dead ends: 128 [2019-12-26 20:45:54,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-26 20:45:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2019-12-26 20:45:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:45:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2019-12-26 20:45:54,632 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 12 [2019-12-26 20:45:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:54,632 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2019-12-26 20:45:54,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2019-12-26 20:45:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:54,633 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:54,633 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:54,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:54,836 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-26 20:45:54,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:54,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733043939] [2019-12-26 20:45:54,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:54,902 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 20:45:54,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733043939] [2019-12-26 20:45:54,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244420839] [2019-12-26 20:45:54,903 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 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 20:45:54,943 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:54,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:54,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:54,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,037 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 20:45:55,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:55,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785401309] [2019-12-26 20:45:55,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:55,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:55,039 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand 16 states. [2019-12-26 20:45:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,191 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-26 20:45:55,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:55,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:45:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,196 INFO L225 Difference]: With dead ends: 121 [2019-12-26 20:45:55,196 INFO L226 Difference]: Without dead ends: 120 [2019-12-26 20:45:55,196 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 20:45:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-26 20:45:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2019-12-26 20:45:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-26 20:45:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-26 20:45:55,199 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-26 20:45:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,200 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-26 20:45:55,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-26 20:45:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:55,200 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,201 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,405 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-26 20:45:55,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543226054] [2019-12-26 20:45:55,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,490 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 20:45:55,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543226054] [2019-12-26 20:45:55,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533524224] [2019-12-26 20:45:55,491 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 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 20:45:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:45:55,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,788 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 20:45:55,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:45:55,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111551819] [2019-12-26 20:45:55,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:45:55,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:45:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:55,790 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 18 states. [2019-12-26 20:45:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,974 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-26 20:45:55,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:55,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-26 20:45:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,976 INFO L225 Difference]: With dead ends: 131 [2019-12-26 20:45:55,976 INFO L226 Difference]: Without dead ends: 130 [2019-12-26 20:45:55,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:45:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-26 20:45:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-26 20:45:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:55,981 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,981 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:55,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:45:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:55,981 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,982 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:56,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:56,185 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 28 times [2019-12-26 20:45:56,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:56,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988536326] [2019-12-26 20:45:56,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:56,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988536326] [2019-12-26 20:45:56,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530923988] [2019-12-26 20:45:56,265 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 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 20:45:56,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:56,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:56,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:56,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:56,428 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 20:45:56,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:56,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:56,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747484195] [2019-12-26 20:45:56,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:56,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:56,430 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:56,719 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-26 20:45:56,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:56,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:56,722 INFO L225 Difference]: With dead ends: 149 [2019-12-26 20:45:56,722 INFO L226 Difference]: Without dead ends: 148 [2019-12-26 20:45:56,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:45:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-26 20:45:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-26 20:45:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:56,726 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:56,726 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:56,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:56,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:56,727 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:56,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:56,930 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 29 times [2019-12-26 20:45:56,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:56,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438040924] [2019-12-26 20:45:56,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438040924] [2019-12-26 20:45:57,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922546113] [2019-12-26 20:45:57,024 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 20:45:57,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:57,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:57,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:57,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:57,177 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 20:45:57,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:57,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:57,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134765262] [2019-12-26 20:45:57,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:57,178 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:45:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,489 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-26 20:45:57,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:57,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:45:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,491 INFO L225 Difference]: With dead ends: 157 [2019-12-26 20:45:57,491 INFO L226 Difference]: Without dead ends: 156 [2019-12-26 20:45:57,492 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 20:45:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-26 20:45:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2019-12-26 20:45:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:45:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:45:57,496 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:45:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,496 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:45:57,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:45:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:45:57,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,497 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:57,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,700 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 30 times [2019-12-26 20:45:57,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:57,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951843068] [2019-12-26 20:45:57,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,778 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 20:45:57,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951843068] [2019-12-26 20:45:57,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656732681] [2019-12-26 20:45:57,779 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 20:45:57,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:57,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:57,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:57,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:59,812 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 20:45:59,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:59,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:59,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514848937] [2019-12-26 20:45:59,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:59,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=178, Unknown=4, NotChecked=0, Total=240 [2019-12-26 20:45:59,814 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:46:00,231 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-26 20:46:01,793 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:46:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:01,899 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2019-12-26 20:46:01,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:01,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:01,901 INFO L225 Difference]: With dead ends: 162 [2019-12-26 20:46:01,901 INFO L226 Difference]: Without dead ends: 161 [2019-12-26 20:46:01,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=215, Invalid=483, Unknown=4, NotChecked=0, Total=702 [2019-12-26 20:46:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-26 20:46:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 111. [2019-12-26 20:46:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-26 20:46:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-26 20:46:01,906 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-26 20:46:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:01,906 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-26 20:46:01,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-26 20:46:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:01,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:01,907 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,111 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 31 times [2019-12-26 20:46:02,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247203564] [2019-12-26 20:46:02,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,220 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 20:46:02,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247203564] [2019-12-26 20:46:02,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845192044] [2019-12-26 20:46:02,221 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 20:46:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,380 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 20:46:02,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:02,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213628526] [2019-12-26 20:46:02,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:02,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:02,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:02,382 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 16 states. [2019-12-26 20:46:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,784 INFO L93 Difference]: Finished difference Result 165 states and 347 transitions. [2019-12-26 20:46:02,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:02,785 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,786 INFO L225 Difference]: With dead ends: 165 [2019-12-26 20:46:02,786 INFO L226 Difference]: Without dead ends: 163 [2019-12-26 20:46:02,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-26 20:46:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2019-12-26 20:46:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-26 20:46:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-26 20:46:02,791 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-26 20:46:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,791 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-26 20:46:02,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-26 20:46:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:02,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,792 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,996 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 32 times [2019-12-26 20:46:02,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923756889] [2019-12-26 20:46:02,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:03,079 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 20:46:03,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923756889] [2019-12-26 20:46:03,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448512801] [2019-12-26 20:46:03,080 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 20:46:03,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:03,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:03,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:03,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:03,958 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:03,959 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 20:46:03,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:03,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:03,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623462602] [2019-12-26 20:46:03,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:03,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:03,961 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 16 states. [2019-12-26 20:46:04,281 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-26 20:46:04,661 WARN L192 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:05,536 WARN L192 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-26 20:46:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:05,676 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2019-12-26 20:46:05,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:05,676 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:05,678 INFO L225 Difference]: With dead ends: 168 [2019-12-26 20:46:05,678 INFO L226 Difference]: Without dead ends: 167 [2019-12-26 20:46:05,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-26 20:46:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-26 20:46:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2019-12-26 20:46:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-26 20:46:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2019-12-26 20:46:05,683 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 13 [2019-12-26 20:46:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:05,683 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2019-12-26 20:46:05,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2019-12-26 20:46:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:05,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:05,684 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:05,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:05,887 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 33 times [2019-12-26 20:46:05,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:05,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381495095] [2019-12-26 20:46:05,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:05,962 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 20:46:05,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381495095] [2019-12-26 20:46:05,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480145755] [2019-12-26 20:46:05,962 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 20:46:06,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:06,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:06,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:46:06,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:06,135 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 20:46:06,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:06,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:06,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730218891] [2019-12-26 20:46:06,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:06,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:06,136 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand 16 states. [2019-12-26 20:46:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:06,431 INFO L93 Difference]: Finished difference Result 167 states and 357 transitions. [2019-12-26 20:46:06,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:06,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:06,433 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:06,433 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:06,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2019-12-26 20:46:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-26 20:46:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2019-12-26 20:46:06,437 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 13 [2019-12-26 20:46:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:06,438 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2019-12-26 20:46:06,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2019-12-26 20:46:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:06,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:06,438 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:06,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:06,640 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 34 times [2019-12-26 20:46:06,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:06,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595209896] [2019-12-26 20:46:06,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595209896] [2019-12-26 20:46:06,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609497073] [2019-12-26 20:46:06,734 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 20:46:06,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:06,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:06,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:06,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:07,688 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:07,689 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 20:46:07,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:07,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:07,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363270715] [2019-12-26 20:46:07,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:07,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:07,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:07,690 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand 16 states. [2019-12-26 20:46:08,953 WARN L192 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:09,483 INFO L93 Difference]: Finished difference Result 159 states and 334 transitions. [2019-12-26 20:46:09,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:09,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:09,485 INFO L225 Difference]: With dead ends: 159 [2019-12-26 20:46:09,485 INFO L226 Difference]: Without dead ends: 158 [2019-12-26 20:46:09,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=356, Unknown=1, NotChecked=0, Total=506 [2019-12-26 20:46:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-26 20:46:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2019-12-26 20:46:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-26 20:46:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-26 20:46:09,490 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-26 20:46:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:09,490 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-26 20:46:09,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-26 20:46:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:09,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:09,491 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:09,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:09,692 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 35 times [2019-12-26 20:46:09,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:09,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906392912] [2019-12-26 20:46:09,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:09,778 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 20:46:09,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906392912] [2019-12-26 20:46:09,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106284812] [2019-12-26 20:46:09,779 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 20:46:09,827 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:09,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:09,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:09,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:09,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538512681] [2019-12-26 20:46:09,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:09,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:09,958 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 16 states. [2019-12-26 20:46:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:10,411 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2019-12-26 20:46:10,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:10,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:10,413 INFO L225 Difference]: With dead ends: 183 [2019-12-26 20:46:10,413 INFO L226 Difference]: Without dead ends: 181 [2019-12-26 20:46:10,414 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 20:46:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-26 20:46:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 116. [2019-12-26 20:46:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:10,417 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:10,418 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:10,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:10,418 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:10,418 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:10,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:10,622 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:10,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:10,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 36 times [2019-12-26 20:46:10,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:10,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131664388] [2019-12-26 20:46:10,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:10,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131664388] [2019-12-26 20:46:10,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210495642] [2019-12-26 20:46:10,708 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 20:46:10,752 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:10,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:10,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:10,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:11,231 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 20:46:11,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:11,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:11,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350388481] [2019-12-26 20:46:11,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:11,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:11,233 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:11,659 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-26 20:46:11,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:11,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:11,661 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:11,661 INFO L226 Difference]: Without dead ends: 184 [2019-12-26 20:46:11,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-26 20:46:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 116. [2019-12-26 20:46:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:11,665 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:11,665 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:11,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:11,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:11,666 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:11,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,867 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 37 times [2019-12-26 20:46:11,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:11,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869140386] [2019-12-26 20:46:11,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:11,955 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 20:46:11,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869140386] [2019-12-26 20:46:11,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811647984] [2019-12-26 20:46:11,956 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 20:46:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:12,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:12,278 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 20:46:12,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:12,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:12,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901988594] [2019-12-26 20:46:12,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:12,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:12,281 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:12,907 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2019-12-26 20:46:12,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:46:12,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:12,909 INFO L225 Difference]: With dead ends: 177 [2019-12-26 20:46:12,909 INFO L226 Difference]: Without dead ends: 175 [2019-12-26 20:46:12,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-26 20:46:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2019-12-26 20:46:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-26 20:46:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 268 transitions. [2019-12-26 20:46:12,913 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 268 transitions. Word has length 13 [2019-12-26 20:46:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:12,913 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 268 transitions. [2019-12-26 20:46:12,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 268 transitions. [2019-12-26 20:46:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:12,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:12,914 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:13,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:13,117 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 38 times [2019-12-26 20:46:13,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:13,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038425236] [2019-12-26 20:46:13,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:13,204 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 20:46:13,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038425236] [2019-12-26 20:46:13,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805471755] [2019-12-26 20:46:13,205 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 20:46:13,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:13,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:13,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:13,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:13,829 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 20:46:13,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:13,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:13,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035675108] [2019-12-26 20:46:13,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:13,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:13,831 INFO L87 Difference]: Start difference. First operand 115 states and 268 transitions. Second operand 16 states. [2019-12-26 20:46:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:14,294 INFO L93 Difference]: Finished difference Result 167 states and 357 transitions. [2019-12-26 20:46:14,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:14,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:14,296 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:14,296 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:14,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=494, Unknown=1, NotChecked=0, Total=702 [2019-12-26 20:46:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 116. [2019-12-26 20:46:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:14,299 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:14,299 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:14,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:14,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:14,300 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:14,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:14,501 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 39 times [2019-12-26 20:46:14,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:14,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802370478] [2019-12-26 20:46:14,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802370478] [2019-12-26 20:46:14,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870808937] [2019-12-26 20:46:14,581 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 20:46:14,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:14,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:14,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:14,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:14,812 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 20:46:14,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:14,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:14,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67535838] [2019-12-26 20:46:14,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:14,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:14,814 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:15,228 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2019-12-26 20:46:15,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:15,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:15,230 INFO L225 Difference]: With dead ends: 174 [2019-12-26 20:46:15,230 INFO L226 Difference]: Without dead ends: 173 [2019-12-26 20:46:15,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:46:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-26 20:46:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2019-12-26 20:46:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 272 transitions. [2019-12-26 20:46:15,234 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 272 transitions. Word has length 13 [2019-12-26 20:46:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:15,234 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 272 transitions. [2019-12-26 20:46:15,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 272 transitions. [2019-12-26 20:46:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:15,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:15,235 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:15,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:15,438 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 40 times [2019-12-26 20:46:15,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:15,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709998044] [2019-12-26 20:46:15,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:15,524 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 20:46:15,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709998044] [2019-12-26 20:46:15,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697383596] [2019-12-26 20:46:15,525 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 20:46:15,568 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:15,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:15,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:15,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:17,794 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 20:46:17,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:17,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:17,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439347038] [2019-12-26 20:46:17,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:17,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:17,795 INFO L87 Difference]: Start difference. First operand 116 states and 272 transitions. Second operand 16 states. [2019-12-26 20:46:21,806 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-26 20:46:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:24,154 INFO L93 Difference]: Finished difference Result 167 states and 360 transitions. [2019-12-26 20:46:24,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:24,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:24,155 INFO L225 Difference]: With dead ends: 167 [2019-12-26 20:46:24,155 INFO L226 Difference]: Without dead ends: 166 [2019-12-26 20:46:24,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-26 20:46:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2019-12-26 20:46:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-26 20:46:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2019-12-26 20:46:24,160 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 13 [2019-12-26 20:46:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:24,160 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2019-12-26 20:46:24,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2019-12-26 20:46:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:24,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:24,161 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:24,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:24,364 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:24,365 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 41 times [2019-12-26 20:46:24,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:24,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007268002] [2019-12-26 20:46:24,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:24,438 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 20:46:24,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007268002] [2019-12-26 20:46:24,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455627707] [2019-12-26 20:46:24,439 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 20:46:24,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:24,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:24,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:24,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:24,593 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 20:46:24,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:24,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:24,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12321183] [2019-12-26 20:46:24,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:24,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:24,595 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand 16 states. [2019-12-26 20:46:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:24,876 INFO L93 Difference]: Finished difference Result 145 states and 308 transitions. [2019-12-26 20:46:24,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:24,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:24,878 INFO L225 Difference]: With dead ends: 145 [2019-12-26 20:46:24,878 INFO L226 Difference]: Without dead ends: 144 [2019-12-26 20:46:24,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-26 20:46:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2019-12-26 20:46:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:24,882 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:24,882 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:24,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:24,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:24,883 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:25,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:25,086 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:25,086 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 42 times [2019-12-26 20:46:25,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:25,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134382934] [2019-12-26 20:46:25,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:25,169 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 20:46:25,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134382934] [2019-12-26 20:46:25,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575185842] [2019-12-26 20:46:25,170 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 20:46:25,225 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:25,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:25,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:25,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:26,079 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 20:46:26,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:26,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049025452] [2019-12-26 20:46:26,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:26,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:26,080 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:30,066 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:30,100 INFO L93 Difference]: Finished difference Result 191 states and 400 transitions. [2019-12-26 20:46:30,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:30,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:30,102 INFO L225 Difference]: With dead ends: 191 [2019-12-26 20:46:30,102 INFO L226 Difference]: Without dead ends: 189 [2019-12-26 20:46:30,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=276, Invalid=648, Unknown=6, NotChecked=0, Total=930 [2019-12-26 20:46:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-26 20:46:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 118. [2019-12-26 20:46:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-26 20:46:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 271 transitions. [2019-12-26 20:46:30,106 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 271 transitions. Word has length 13 [2019-12-26 20:46:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:30,107 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 271 transitions. [2019-12-26 20:46:30,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 271 transitions. [2019-12-26 20:46:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:30,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:30,107 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:30,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:30,311 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 43 times [2019-12-26 20:46:30,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:30,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313587007] [2019-12-26 20:46:30,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,395 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 20:46:30,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313587007] [2019-12-26 20:46:30,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350602942] [2019-12-26 20:46:30,395 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 20:46:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:30,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:31,655 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 20:46:31,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:31,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:31,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234496436] [2019-12-26 20:46:31,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:31,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:31,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:31,656 INFO L87 Difference]: Start difference. First operand 118 states and 271 transitions. Second operand 16 states. [2019-12-26 20:46:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,916 INFO L93 Difference]: Finished difference Result 187 states and 399 transitions. [2019-12-26 20:46:32,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:32,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,918 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:32,918 INFO L226 Difference]: Without dead ends: 185 [2019-12-26 20:46:32,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2019-12-26 20:46:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-26 20:46:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 120. [2019-12-26 20:46:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:32,922 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,922 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:32,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,923 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,923 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:33,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:33,127 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 44 times [2019-12-26 20:46:33,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:33,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397887467] [2019-12-26 20:46:33,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397887467] [2019-12-26 20:46:33,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231141899] [2019-12-26 20:46:33,205 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 20:46:33,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:33,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:33,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:33,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:33,585 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 20:46:33,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:33,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:33,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844418001] [2019-12-26 20:46:33,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:33,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:33,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:33,586 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:34,095 INFO L93 Difference]: Finished difference Result 186 states and 392 transitions. [2019-12-26 20:46:34,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:34,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:34,096 INFO L225 Difference]: With dead ends: 186 [2019-12-26 20:46:34,096 INFO L226 Difference]: Without dead ends: 184 [2019-12-26 20:46:34,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-26 20:46:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 118. [2019-12-26 20:46:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-26 20:46:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 271 transitions. [2019-12-26 20:46:34,100 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 271 transitions. Word has length 13 [2019-12-26 20:46:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:34,100 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 271 transitions. [2019-12-26 20:46:34,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 271 transitions. [2019-12-26 20:46:34,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:34,101 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:34,101 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:34,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:34,304 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 45 times [2019-12-26 20:46:34,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:34,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755615780] [2019-12-26 20:46:34,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:34,412 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 20:46:34,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755615780] [2019-12-26 20:46:34,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558748467] [2019-12-26 20:46:34,413 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 20:46:34,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:46:34,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:34,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:34,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [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 L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:34,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:34,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237585437] [2019-12-26 20:46:34,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:34,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:34,556 INFO L87 Difference]: Start difference. First operand 118 states and 271 transitions. Second operand 16 states. [2019-12-26 20:46:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:34,942 INFO L93 Difference]: Finished difference Result 193 states and 408 transitions. [2019-12-26 20:46:34,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:46:34,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:34,944 INFO L225 Difference]: With dead ends: 193 [2019-12-26 20:46:34,944 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:34,944 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 20:46:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2019-12-26 20:46:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:46:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-26 20:46:34,947 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-26 20:46:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:34,947 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-26 20:46:34,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-26 20:46:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:34,948 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:34,948 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:35,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:35,149 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 46 times [2019-12-26 20:46:35,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:35,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053145136] [2019-12-26 20:46:35,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:35,246 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 20:46:35,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053145136] [2019-12-26 20:46:35,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630203532] [2019-12-26 20:46:35,247 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 20:46:35,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:35,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:35,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:35,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:35,410 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 20:46:35,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:35,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:35,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299307744] [2019-12-26 20:46:35,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:35,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:35,412 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-26 20:46:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:35,798 INFO L93 Difference]: Finished difference Result 191 states and 415 transitions. [2019-12-26 20:46:35,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:35,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:35,800 INFO L225 Difference]: With dead ends: 191 [2019-12-26 20:46:35,800 INFO L226 Difference]: Without dead ends: 189 [2019-12-26 20:46:35,800 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 20:46:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-26 20:46:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 121. [2019-12-26 20:46:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:46:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-26 20:46:35,804 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-26 20:46:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:35,805 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-26 20:46:35,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-26 20:46:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:35,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:35,805 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:36,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,009 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 47 times [2019-12-26 20:46:36,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:36,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717198904] [2019-12-26 20:46:36,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:36,111 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 20:46:36,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717198904] [2019-12-26 20:46:36,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486508836] [2019-12-26 20:46:36,112 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 20:46:36,156 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:36,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:36,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:36,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:36,262 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 20:46:36,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:36,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:36,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054335840] [2019-12-26 20:46:36,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:36,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:36,264 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-26 20:46:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:36,553 INFO L93 Difference]: Finished difference Result 191 states and 415 transitions. [2019-12-26 20:46:36,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:36,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:36,555 INFO L225 Difference]: With dead ends: 191 [2019-12-26 20:46:36,555 INFO L226 Difference]: Without dead ends: 189 [2019-12-26 20:46:36,555 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 20:46:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-26 20:46:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 120. [2019-12-26 20:46:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:36,563 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:36,563 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:36,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:36,564 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:36,564 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:36,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:36,767 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 48 times [2019-12-26 20:46:36,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:36,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62177309] [2019-12-26 20:46:36,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:36,867 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 20:46:36,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62177309] [2019-12-26 20:46:36,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987172274] [2019-12-26 20:46:36,867 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 20:46:36,909 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:36,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:36,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:36,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:37,005 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 20:46:37,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:37,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:37,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035401437] [2019-12-26 20:46:37,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:37,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:37,007 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:37,381 INFO L93 Difference]: Finished difference Result 190 states and 405 transitions. [2019-12-26 20:46:37,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:37,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:37,383 INFO L225 Difference]: With dead ends: 190 [2019-12-26 20:46:37,383 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:37,384 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 20:46:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 123. [2019-12-26 20:46:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-26 20:46:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-26 20:46:37,387 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 13 [2019-12-26 20:46:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:37,387 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-26 20:46:37,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-26 20:46:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:37,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:37,388 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:37,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:37,589 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 49 times [2019-12-26 20:46:37,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:37,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645006944] [2019-12-26 20:46:37,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:37,665 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 20:46:37,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645006944] [2019-12-26 20:46:37,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552228307] [2019-12-26 20:46:37,666 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:37,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:37,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:37,812 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 20:46:37,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:37,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:37,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415239889] [2019-12-26 20:46:37,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:37,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:37,814 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 16 states. [2019-12-26 20:46:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:38,215 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2019-12-26 20:46:38,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:38,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:38,216 INFO L225 Difference]: With dead ends: 193 [2019-12-26 20:46:38,217 INFO L226 Difference]: Without dead ends: 191 [2019-12-26 20:46:38,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-26 20:46:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2019-12-26 20:46:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-26 20:46:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 283 transitions. [2019-12-26 20:46:38,220 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 283 transitions. Word has length 13 [2019-12-26 20:46:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:38,220 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 283 transitions. [2019-12-26 20:46:38,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 283 transitions. [2019-12-26 20:46:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:38,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:38,221 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:38,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:38,422 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 50 times [2019-12-26 20:46:38,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:38,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236094593] [2019-12-26 20:46:38,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:38,490 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 20:46:38,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236094593] [2019-12-26 20:46:38,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277325867] [2019-12-26 20:46:38,491 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 20:46:38,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:38,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:38,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:38,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:38,620 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 20:46:38,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:38,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:38,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821531828] [2019-12-26 20:46:38,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:38,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:38,623 INFO L87 Difference]: Start difference. First operand 121 states and 283 transitions. Second operand 16 states. [2019-12-26 20:46:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:38,915 INFO L93 Difference]: Finished difference Result 159 states and 343 transitions. [2019-12-26 20:46:38,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:38,915 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:38,917 INFO L225 Difference]: With dead ends: 159 [2019-12-26 20:46:38,917 INFO L226 Difference]: Without dead ends: 158 [2019-12-26 20:46:38,917 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 20:46:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-26 20:46:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2019-12-26 20:46:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-26 20:46:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 279 transitions. [2019-12-26 20:46:38,920 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 279 transitions. Word has length 13 [2019-12-26 20:46:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:38,921 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 279 transitions. [2019-12-26 20:46:38,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 279 transitions. [2019-12-26 20:46:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:38,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:38,922 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,125 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 51 times [2019-12-26 20:46:39,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:39,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757809562] [2019-12-26 20:46:39,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,219 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 20:46:39,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757809562] [2019-12-26 20:46:39,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346947278] [2019-12-26 20:46:39,220 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 20:46:39,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:39,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:39,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:39,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:39,450 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 20:46:39,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:39,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:39,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315164009] [2019-12-26 20:46:39,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:39,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:39,451 INFO L87 Difference]: Start difference. First operand 120 states and 279 transitions. Second operand 16 states. [2019-12-26 20:46:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:39,788 INFO L93 Difference]: Finished difference Result 164 states and 348 transitions. [2019-12-26 20:46:39,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:39,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:39,790 INFO L225 Difference]: With dead ends: 164 [2019-12-26 20:46:39,790 INFO L226 Difference]: Without dead ends: 163 [2019-12-26 20:46:39,791 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 20:46:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-26 20:46:39,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2019-12-26 20:46:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-26 20:46:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 275 transitions. [2019-12-26 20:46:39,794 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 275 transitions. Word has length 13 [2019-12-26 20:46:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:39,794 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 275 transitions. [2019-12-26 20:46:39,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 275 transitions. [2019-12-26 20:46:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:39,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:39,795 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,999 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 52 times [2019-12-26 20:46:40,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:40,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339933293] [2019-12-26 20:46:40,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:40,064 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 20:46:40,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339933293] [2019-12-26 20:46:40,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012633791] [2019-12-26 20:46:40,065 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 20:46:40,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:40,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:40,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:40,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:40,210 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 20:46:40,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:40,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:40,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047007371] [2019-12-26 20:46:40,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:40,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:40,212 INFO L87 Difference]: Start difference. First operand 119 states and 275 transitions. Second operand 16 states. [2019-12-26 20:46:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:40,620 INFO L93 Difference]: Finished difference Result 171 states and 359 transitions. [2019-12-26 20:46:40,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:40,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:40,622 INFO L225 Difference]: With dead ends: 171 [2019-12-26 20:46:40,622 INFO L226 Difference]: Without dead ends: 169 [2019-12-26 20:46:40,622 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 20:46:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-26 20:46:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 116. [2019-12-26 20:46:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:40,626 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:40,626 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:40,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:40,627 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:40,627 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:40,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:40,830 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 53 times [2019-12-26 20:46:40,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:40,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033064560] [2019-12-26 20:46:40,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:40,910 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 20:46:40,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033064560] [2019-12-26 20:46:40,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196174617] [2019-12-26 20:46:40,911 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 20:46:40,956 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:40,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:40,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:40,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:41,051 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 20:46:41,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:41,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:41,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387457503] [2019-12-26 20:46:41,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:41,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:41,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:41,054 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:41,430 INFO L93 Difference]: Finished difference Result 178 states and 371 transitions. [2019-12-26 20:46:41,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:46:41,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:41,432 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:46:41,432 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:46:41,433 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 20:46:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:46:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2019-12-26 20:46:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-26 20:46:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-26 20:46:41,436 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-26 20:46:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:41,436 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-26 20:46:41,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-26 20:46:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:41,437 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:41,437 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:41,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:41,638 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 54 times [2019-12-26 20:46:41,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:41,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523925568] [2019-12-26 20:46:41,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:41,716 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 20:46:41,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523925568] [2019-12-26 20:46:41,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023815997] [2019-12-26 20:46:41,717 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 20:46:41,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:41,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:41,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:41,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:41,851 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 20:46:41,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:41,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:41,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466115710] [2019-12-26 20:46:41,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:41,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:41,853 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 16 states. [2019-12-26 20:46:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:42,149 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2019-12-26 20:46:42,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:42,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:42,151 INFO L225 Difference]: With dead ends: 173 [2019-12-26 20:46:42,151 INFO L226 Difference]: Without dead ends: 171 [2019-12-26 20:46:42,151 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 20:46:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-26 20:46:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2019-12-26 20:46:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-26 20:46:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-26 20:46:42,154 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-26 20:46:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:42,154 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-26 20:46:42,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-26 20:46:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:42,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:42,155 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:42,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:42,359 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 55 times [2019-12-26 20:46:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:42,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944477628] [2019-12-26 20:46:42,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:42,442 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 20:46:42,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944477628] [2019-12-26 20:46:42,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315331123] [2019-12-26 20:46:42,442 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 20:46:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:42,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:42,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:42,619 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 20:46:42,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:42,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:42,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644501663] [2019-12-26 20:46:42,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:42,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:42,621 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 16 states. [2019-12-26 20:46:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:42,994 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2019-12-26 20:46:42,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:46:42,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:42,996 INFO L225 Difference]: With dead ends: 172 [2019-12-26 20:46:42,996 INFO L226 Difference]: Without dead ends: 170 [2019-12-26 20:46:42,996 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 20:46:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-26 20:46:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 115. [2019-12-26 20:46:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-26 20:46:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-26 20:46:43,000 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-26 20:46:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:43,000 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-26 20:46:43,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-26 20:46:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:43,001 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:43,001 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:43,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:43,202 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 56 times [2019-12-26 20:46:43,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:43,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667167216] [2019-12-26 20:46:43,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:43,269 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 20:46:43,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667167216] [2019-12-26 20:46:43,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674946992] [2019-12-26 20:46:43,270 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 20:46:43,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:43,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:43,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:43,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:43,428 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 20:46:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:43,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:43,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269568463] [2019-12-26 20:46:43,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:43,430 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 16 states. [2019-12-26 20:46:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:43,787 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2019-12-26 20:46:43,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:43,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:43,790 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:46:43,790 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:46:43,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:46:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2019-12-26 20:46:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-26 20:46:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-26 20:46:43,794 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-26 20:46:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:43,795 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-26 20:46:43,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-26 20:46:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:43,795 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:43,796 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:44,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:44,000 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-26 20:46:44,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:44,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321520736] [2019-12-26 20:46:44,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:44,119 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 20:46:44,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321520736] [2019-12-26 20:46:44,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323512912] [2019-12-26 20:46:44,120 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 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 20:46:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:44,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:44,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:44,333 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 20:46:44,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:44,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:44,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114958922] [2019-12-26 20:46:44,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:44,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:44,335 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 18 states. [2019-12-26 20:46:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:44,508 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-26 20:46:44,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:46:44,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-12-26 20:46:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:44,510 INFO L225 Difference]: With dead ends: 135 [2019-12-26 20:46:44,510 INFO L226 Difference]: Without dead ends: 134 [2019-12-26 20:46:44,511 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 20:46:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-26 20:46:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-26 20:46:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-26 20:46:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-26 20:46:44,514 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-26 20:46:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:44,515 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-26 20:46:44,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-26 20:46:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:44,516 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:44,516 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:44,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:44,721 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-26 20:46:44,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:44,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458300384] [2019-12-26 20:46:44,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:44,838 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 20:46:44,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458300384] [2019-12-26 20:46:44,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549631755] [2019-12-26 20:46:44,838 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 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 20:46:44,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:44,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:44,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:46:44,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:45,045 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 20:46:45,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:45,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:46:45,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903311477] [2019-12-26 20:46:45,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:46:45,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:46:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:46:45,046 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 20 states. [2019-12-26 20:46:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:45,278 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-26 20:46:45,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:46:45,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-12-26 20:46:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:45,279 INFO L225 Difference]: With dead ends: 146 [2019-12-26 20:46:45,279 INFO L226 Difference]: Without dead ends: 145 [2019-12-26 20:46:45,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-26 20:46:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-26 20:46:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:45,283 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:45,284 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:45,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:46:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:45,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:45,284 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:45,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:45,488 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:45,488 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 57 times [2019-12-26 20:46:45,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:45,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155595315] [2019-12-26 20:46:45,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:45,573 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 20:46:45,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155595315] [2019-12-26 20:46:45,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576936610] [2019-12-26 20:46:45,574 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 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 20:46:45,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:46:45,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:45,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:46:45,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:45,737 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 20:46:45,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:45,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:45,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675394714] [2019-12-26 20:46:45,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:45,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:45,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:45,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:45,739 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:45,920 INFO L93 Difference]: Finished difference Result 164 states and 347 transitions. [2019-12-26 20:46:45,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:45,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:45,922 INFO L225 Difference]: With dead ends: 164 [2019-12-26 20:46:45,923 INFO L226 Difference]: Without dead ends: 163 [2019-12-26 20:46:45,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:46:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-26 20:46:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2019-12-26 20:46:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:45,926 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:45,926 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:45,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:45,927 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:45,927 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:46,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:46,130 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 58 times [2019-12-26 20:46:46,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:46,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346912237] [2019-12-26 20:46:46,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:46,210 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 20:46:46,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346912237] [2019-12-26 20:46:46,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245828177] [2019-12-26 20:46:46,211 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 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 20:46:46,256 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:46,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:46,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:46,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:46,377 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 20:46:46,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:46,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:46,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820390360] [2019-12-26 20:46:46,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:46,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:46,379 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:46,854 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-26 20:46:46,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:46,855 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:46,856 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:46,856 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:46:46,857 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 20:46:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:46:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-26 20:46:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:46,860 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:46,860 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:46,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:46,861 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:46,861 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:47,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:47,065 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 59 times [2019-12-26 20:46:47,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:47,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341656010] [2019-12-26 20:46:47,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:47,154 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 20:46:47,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341656010] [2019-12-26 20:46:47,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010754535] [2019-12-26 20:46:47,155 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 20:46:47,199 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:46:47,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:47,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:47,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:49,757 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 20:46:49,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:49,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:49,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964823525] [2019-12-26 20:46:49,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:49,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=232, Unknown=4, NotChecked=0, Total=306 [2019-12-26 20:46:49,758 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:52,134 WARN L192 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-26 20:46:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:53,056 INFO L93 Difference]: Finished difference Result 189 states and 393 transitions. [2019-12-26 20:46:53,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:53,057 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:53,058 INFO L225 Difference]: With dead ends: 189 [2019-12-26 20:46:53,059 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:53,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=274, Invalid=652, Unknown=4, NotChecked=0, Total=930 [2019-12-26 20:46:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2019-12-26 20:46:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:53,062 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:53,063 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:53,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:53,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:53,063 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:53,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:53,267 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 60 times [2019-12-26 20:46:53,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:53,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591704651] [2019-12-26 20:46:53,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:53,363 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 20:46:53,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591704651] [2019-12-26 20:46:53,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131838134] [2019-12-26 20:46:53,364 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:46:53,412 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:53,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:53,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:53,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:53,557 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 20:46:53,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:53,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:53,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730290801] [2019-12-26 20:46:53,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:53,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:53,559 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:54,013 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2019-12-26 20:46:54,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:54,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:54,015 INFO L225 Difference]: With dead ends: 187 [2019-12-26 20:46:54,015 INFO L226 Difference]: Without dead ends: 186 [2019-12-26 20:46:54,016 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 20:46:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-26 20:46:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-12-26 20:46:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:46:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:46:54,019 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:46:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:54,019 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:46:54,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:46:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:54,020 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:54,020 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:54,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:54,223 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 61 times [2019-12-26 20:46:54,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:54,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286492520] [2019-12-26 20:46:54,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:54,330 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 20:46:54,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286492520] [2019-12-26 20:46:54,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963238455] [2019-12-26 20:46:54,331 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 20:46:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:54,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:54,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:54,991 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:54,992 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 20:46:54,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:54,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:54,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433449073] [2019-12-26 20:46:54,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:54,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:46:54,993 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:46:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:55,528 INFO L93 Difference]: Finished difference Result 198 states and 417 transitions. [2019-12-26 20:46:55,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:55,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:55,530 INFO L225 Difference]: With dead ends: 198 [2019-12-26 20:46:55,530 INFO L226 Difference]: Without dead ends: 197 [2019-12-26 20:46:55,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:46:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-26 20:46:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2019-12-26 20:46:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:46:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-26 20:46:55,535 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-26 20:46:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:55,536 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-26 20:46:55,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-26 20:46:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:55,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:55,537 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:55,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:55,740 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 62 times [2019-12-26 20:46:55,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:55,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036388276] [2019-12-26 20:46:55,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,845 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 20:46:55,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036388276] [2019-12-26 20:46:55,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264561082] [2019-12-26 20:46:55,846 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 20:46:55,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:55,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:55,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:55,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:56,980 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:46:57,851 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:46:57,852 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 20:46:57,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:57,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:46:57,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957635428] [2019-12-26 20:46:57,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:46:57,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:46:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=231, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:46:57,853 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-26 20:46:58,238 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-26 20:46:58,513 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-26 20:46:59,170 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-26 20:46:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:59,286 INFO L93 Difference]: Finished difference Result 202 states and 424 transitions. [2019-12-26 20:46:59,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:59,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:46:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:59,288 INFO L225 Difference]: With dead ends: 202 [2019-12-26 20:46:59,288 INFO L226 Difference]: Without dead ends: 201 [2019-12-26 20:46:59,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=301, Invalid=687, Unknown=4, NotChecked=0, Total=992 [2019-12-26 20:46:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-26 20:46:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2019-12-26 20:46:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-26 20:46:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-26 20:46:59,292 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-26 20:46:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:59,292 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-26 20:46:59,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:46:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-26 20:46:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:46:59,292 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:59,293 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:59,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:59,493 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 63 times [2019-12-26 20:46:59,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:59,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15409880] [2019-12-26 20:46:59,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:59,574 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 20:46:59,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15409880] [2019-12-26 20:46:59,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636359055] [2019-12-26 20:46:59,575 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 20:46:59,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:46:59,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:59,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:59,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:01,874 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 20:47:01,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:01,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:01,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559894569] [2019-12-26 20:47:01,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:01,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:01,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:47:01,876 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 18 states. [2019-12-26 20:47:02,893 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-26 20:47:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:04,205 INFO L93 Difference]: Finished difference Result 196 states and 409 transitions. [2019-12-26 20:47:04,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:04,206 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:04,207 INFO L225 Difference]: With dead ends: 196 [2019-12-26 20:47:04,207 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:47:04,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=308, Invalid=680, Unknown=4, NotChecked=0, Total=992 [2019-12-26 20:47:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:47:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 124. [2019-12-26 20:47:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:47:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:47:04,211 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:47:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:04,211 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:47:04,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:47:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:04,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:04,211 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:04,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:04,412 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 64 times [2019-12-26 20:47:04,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:04,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736287629] [2019-12-26 20:47:04,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:04,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736287629] [2019-12-26 20:47:04,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496542690] [2019-12-26 20:47:04,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:04,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:04,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:04,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:04,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:04,690 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 20:47:04,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:04,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:04,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020194135] [2019-12-26 20:47:04,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:04,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:04,692 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:47:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:05,269 INFO L93 Difference]: Finished difference Result 192 states and 403 transitions. [2019-12-26 20:47:05,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:05,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:05,271 INFO L225 Difference]: With dead ends: 192 [2019-12-26 20:47:05,271 INFO L226 Difference]: Without dead ends: 190 [2019-12-26 20:47:05,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:47:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-26 20:47:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 124. [2019-12-26 20:47:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:47:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-26 20:47:05,276 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-26 20:47:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:05,276 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-26 20:47:05,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-26 20:47:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:05,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:05,278 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:05,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:05,478 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 65 times [2019-12-26 20:47:05,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:05,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523920802] [2019-12-26 20:47:05,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523920802] [2019-12-26 20:47:05,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784999951] [2019-12-26 20:47:05,571 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 20:47:05,610 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:05,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:05,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:05,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:05,797 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 20:47:05,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:05,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:05,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267170496] [2019-12-26 20:47:05,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:05,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:05,798 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 18 states. [2019-12-26 20:47:06,361 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2019-12-26 20:47:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:07,551 INFO L93 Difference]: Finished difference Result 208 states and 440 transitions. [2019-12-26 20:47:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:07,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:07,553 INFO L225 Difference]: With dead ends: 208 [2019-12-26 20:47:07,553 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:47:07,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:47:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:47:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 127. [2019-12-26 20:47:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:47:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-26 20:47:07,556 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-26 20:47:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:07,556 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-26 20:47:07,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-26 20:47:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:07,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:07,557 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:07,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:07,758 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 66 times [2019-12-26 20:47:07,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:07,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818275226] [2019-12-26 20:47:07,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:07,861 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 20:47:07,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818275226] [2019-12-26 20:47:07,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715080998] [2019-12-26 20:47:07,861 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 20:47:07,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:07,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:07,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:07,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:08,531 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:47:10,544 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:47:10,545 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 20:47:10,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:10,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:10,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861378370] [2019-12-26 20:47:10,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:10,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:10,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:10,546 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-26 20:47:10,808 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2019-12-26 20:47:11,628 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:47:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:11,671 INFO L93 Difference]: Finished difference Result 213 states and 447 transitions. [2019-12-26 20:47:11,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:11,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:11,673 INFO L225 Difference]: With dead ends: 213 [2019-12-26 20:47:11,673 INFO L226 Difference]: Without dead ends: 212 [2019-12-26 20:47:11,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:47:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-26 20:47:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 129. [2019-12-26 20:47:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:11,677 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:11,677 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:11,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:11,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:11,678 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:11,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:11,879 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 67 times [2019-12-26 20:47:11,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:11,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124030399] [2019-12-26 20:47:11,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:11,974 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 20:47:11,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124030399] [2019-12-26 20:47:11,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464061548] [2019-12-26 20:47:11,975 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 20:47:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:12,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:12,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:12,998 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 20:47:12,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:12,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:12,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516561254] [2019-12-26 20:47:12,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:12,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:13,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:13,000 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:13,651 WARN L192 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:47:13,877 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2019-12-26 20:47:14,291 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-26 20:47:15,359 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-26 20:47:15,799 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-26 20:47:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:16,135 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2019-12-26 20:47:16,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:16,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:16,137 INFO L225 Difference]: With dead ends: 213 [2019-12-26 20:47:16,138 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:47:16,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=373, Invalid=815, Unknown=2, NotChecked=0, Total=1190 [2019-12-26 20:47:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:47:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2019-12-26 20:47:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-26 20:47:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 298 transitions. [2019-12-26 20:47:16,141 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 298 transitions. Word has length 14 [2019-12-26 20:47:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:16,142 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 298 transitions. [2019-12-26 20:47:16,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 298 transitions. [2019-12-26 20:47:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:16,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:16,142 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:16,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:16,347 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 68 times [2019-12-26 20:47:16,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:16,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776329237] [2019-12-26 20:47:16,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:16,429 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 20:47:16,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776329237] [2019-12-26 20:47:16,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862115422] [2019-12-26 20:47:16,430 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 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 20:47:16,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:16,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:16,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:16,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:17,085 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:47:20,456 WARN L192 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-26 20:47:20,457 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 20:47:20,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:20,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:20,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434146675] [2019-12-26 20:47:20,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:20,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:20,459 INFO L87 Difference]: Start difference. First operand 128 states and 298 transitions. Second operand 18 states. [2019-12-26 20:47:21,110 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-26 20:47:22,436 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:47:23,874 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-12-26 20:47:25,241 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-26 20:47:25,705 WARN L192 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-26 20:47:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:25,814 INFO L93 Difference]: Finished difference Result 212 states and 449 transitions. [2019-12-26 20:47:25,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:47:25,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:25,817 INFO L225 Difference]: With dead ends: 212 [2019-12-26 20:47:25,817 INFO L226 Difference]: Without dead ends: 211 [2019-12-26 20:47:25,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=322, Invalid=795, Unknown=5, NotChecked=0, Total=1122 [2019-12-26 20:47:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-26 20:47:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2019-12-26 20:47:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:25,820 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:25,821 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:25,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:25,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:25,821 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:26,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:26,022 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 69 times [2019-12-26 20:47:26,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:26,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516426287] [2019-12-26 20:47:26,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:26,107 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 20:47:26,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516426287] [2019-12-26 20:47:26,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143389240] [2019-12-26 20:47:26,108 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 20:47:26,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:26,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:26,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:26,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:28,747 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:47:28,748 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 20:47:28,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:28,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:28,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737632998] [2019-12-26 20:47:28,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:28,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:28,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:28,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=228, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:28,750 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:29,225 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-26 20:47:30,180 WARN L192 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-26 20:47:30,442 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2019-12-26 20:47:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:34,217 INFO L93 Difference]: Finished difference Result 206 states and 440 transitions. [2019-12-26 20:47:34,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:34,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:34,219 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:47:34,219 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:47:34,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=263, Invalid=602, Unknown=5, NotChecked=0, Total=870 [2019-12-26 20:47:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:47:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2019-12-26 20:47:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:47:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-26 20:47:34,223 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 14 [2019-12-26 20:47:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:34,223 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-26 20:47:34,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-26 20:47:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:34,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:34,224 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:34,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:34,425 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 70 times [2019-12-26 20:47:34,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:34,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715873239] [2019-12-26 20:47:34,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:34,564 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 20:47:34,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715873239] [2019-12-26 20:47:34,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809917781] [2019-12-26 20:47:34,564 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 20:47:34,609 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:34,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:34,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:34,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:41,469 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 20:47:41,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:41,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:41,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326093018] [2019-12-26 20:47:41,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:41,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:41,471 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 18 states. [2019-12-26 20:47:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:47,377 INFO L93 Difference]: Finished difference Result 206 states and 440 transitions. [2019-12-26 20:47:47,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:47,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:47,380 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:47:47,380 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:47:47,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=285, Invalid=705, Unknown=2, NotChecked=0, Total=992 [2019-12-26 20:47:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:47:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 127. [2019-12-26 20:47:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-26 20:47:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-26 20:47:47,385 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-26 20:47:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:47,385 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-26 20:47:47,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-26 20:47:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:47,386 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:47,386 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:47,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:47,589 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 71 times [2019-12-26 20:47:47,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:47,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823679103] [2019-12-26 20:47:47,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:47,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823679103] [2019-12-26 20:47:47,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187407242] [2019-12-26 20:47:47,671 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 20:47:47,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:47,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:47,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:47,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:47,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:47,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:47,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748250259] [2019-12-26 20:47:47,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:47,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:47,902 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 18 states. [2019-12-26 20:47:48,191 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2019-12-26 20:47:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:48,716 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-26 20:47:48,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:48,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:48,718 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:47:48,719 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:47:48,719 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 20:47:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:47:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 131. [2019-12-26 20:47:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:47:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-26 20:47:48,723 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-26 20:47:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:48,723 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-26 20:47:48,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-26 20:47:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:48,724 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:48,724 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:48,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:48,928 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 72 times [2019-12-26 20:47:48,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:48,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529964074] [2019-12-26 20:47:48,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:49,014 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 20:47:49,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529964074] [2019-12-26 20:47:49,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358982656] [2019-12-26 20:47:49,015 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 20:47:49,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:47:49,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:49,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:49,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:49,242 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 20:47:49,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:49,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:49,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042313100] [2019-12-26 20:47:49,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:49,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:49,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:49,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:49,244 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-26 20:47:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:49,929 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2019-12-26 20:47:49,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:49,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:49,930 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:47:49,930 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:47:49,930 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 20:47:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:47:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 130. [2019-12-26 20:47:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-26 20:47:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-26 20:47:49,933 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-26 20:47:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:49,934 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-26 20:47:49,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-26 20:47:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:49,934 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:49,934 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:50,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:50,135 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 73 times [2019-12-26 20:47:50,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:50,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733199269] [2019-12-26 20:47:50,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:50,226 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 20:47:50,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733199269] [2019-12-26 20:47:50,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085381419] [2019-12-26 20:47:50,227 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:50,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:50,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:50,489 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 20:47:50,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:50,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:50,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644167203] [2019-12-26 20:47:50,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:50,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:50,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:50,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:50,490 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-26 20:47:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:51,120 INFO L93 Difference]: Finished difference Result 225 states and 472 transitions. [2019-12-26 20:47:51,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:51,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:51,123 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:47:51,123 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:47:51,123 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 20:47:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:47:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 130. [2019-12-26 20:47:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-26 20:47:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 306 transitions. [2019-12-26 20:47:51,126 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 306 transitions. Word has length 14 [2019-12-26 20:47:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:51,126 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 306 transitions. [2019-12-26 20:47:51,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 306 transitions. [2019-12-26 20:47:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:51,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:51,127 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:51,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:51,328 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 74 times [2019-12-26 20:47:51,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:51,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319365142] [2019-12-26 20:47:51,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:51,419 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 20:47:51,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319365142] [2019-12-26 20:47:51,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860445741] [2019-12-26 20:47:51,419 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 20:47:51,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:51,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:51,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:51,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:51,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:51,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:51,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514829111] [2019-12-26 20:47:51,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:51,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:51,676 INFO L87 Difference]: Start difference. First operand 130 states and 306 transitions. Second operand 18 states. [2019-12-26 20:47:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:52,315 INFO L93 Difference]: Finished difference Result 235 states and 500 transitions. [2019-12-26 20:47:52,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:52,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:52,317 INFO L225 Difference]: With dead ends: 235 [2019-12-26 20:47:52,317 INFO L226 Difference]: Without dead ends: 233 [2019-12-26 20:47:52,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:47:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-26 20:47:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 134. [2019-12-26 20:47:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:47:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:47:52,320 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:47:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:52,321 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:47:52,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:47:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:52,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:52,321 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:52,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:52,522 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 75 times [2019-12-26 20:47:52,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:52,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345816639] [2019-12-26 20:47:52,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:52,610 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 20:47:52,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345816639] [2019-12-26 20:47:52,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546729256] [2019-12-26 20:47:52,611 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 20:47:52,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:47:52,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:52,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:52,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:56,939 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 20:47:56,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:56,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:56,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164103366] [2019-12-26 20:47:56,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:56,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:47:56,940 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:47:59,542 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-26 20:48:01,675 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:48:03,811 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:48:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:08,565 INFO L93 Difference]: Finished difference Result 228 states and 487 transitions. [2019-12-26 20:48:08,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:48:08,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:08,567 INFO L225 Difference]: With dead ends: 228 [2019-12-26 20:48:08,567 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:48:08,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=334, Invalid=786, Unknown=2, NotChecked=0, Total=1122 [2019-12-26 20:48:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:48:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2019-12-26 20:48:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:08,571 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:08,571 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:08,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:08,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:08,572 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:08,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:08,774 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 76 times [2019-12-26 20:48:08,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:08,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348474682] [2019-12-26 20:48:08,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:08,868 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 20:48:08,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348474682] [2019-12-26 20:48:08,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822837343] [2019-12-26 20:48:08,869 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:08,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:08,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:08,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:08,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:09,212 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 20:48:09,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:09,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:09,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204721635] [2019-12-26 20:48:09,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:09,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:09,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:09,213 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:10,873 INFO L93 Difference]: Finished difference Result 205 states and 442 transitions. [2019-12-26 20:48:10,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:48:10,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:10,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:10,875 INFO L225 Difference]: With dead ends: 205 [2019-12-26 20:48:10,875 INFO L226 Difference]: Without dead ends: 204 [2019-12-26 20:48:10,875 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 20:48:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-26 20:48:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 134. [2019-12-26 20:48:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:10,879 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:10,879 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:10,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:10,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:10,880 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:11,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:11,080 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 77 times [2019-12-26 20:48:11,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:11,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29950572] [2019-12-26 20:48:11,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:11,205 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 20:48:11,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29950572] [2019-12-26 20:48:11,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627019731] [2019-12-26 20:48:11,206 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 20:48:11,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:48:11,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:11,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:11,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:13,686 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 20:48:13,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:13,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:13,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550215910] [2019-12-26 20:48:13,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:13,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:13,687 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:22,128 INFO L93 Difference]: Finished difference Result 206 states and 449 transitions. [2019-12-26 20:48:22,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:22,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:22,130 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:48:22,130 INFO L226 Difference]: Without dead ends: 205 [2019-12-26 20:48:22,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=248, Invalid=621, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:48:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-26 20:48:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 135. [2019-12-26 20:48:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:48:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 326 transitions. [2019-12-26 20:48:22,134 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 326 transitions. Word has length 14 [2019-12-26 20:48:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:22,135 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 326 transitions. [2019-12-26 20:48:22,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 326 transitions. [2019-12-26 20:48:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:22,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:22,135 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:22,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:22,338 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 78 times [2019-12-26 20:48:22,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:22,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625101817] [2019-12-26 20:48:22,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:22,429 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 20:48:22,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625101817] [2019-12-26 20:48:22,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747264082] [2019-12-26 20:48:22,429 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 20:48:22,474 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:22,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:22,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:22,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:22,736 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 20:48:22,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:22,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:22,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584728835] [2019-12-26 20:48:22,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:22,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:22,738 INFO L87 Difference]: Start difference. First operand 135 states and 326 transitions. Second operand 18 states. [2019-12-26 20:48:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:23,312 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-26 20:48:23,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:23,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:23,314 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:48:23,314 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:48:23,315 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 20:48:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:48:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2019-12-26 20:48:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:23,318 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:23,318 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:23,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:23,318 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:23,319 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:23,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:23,519 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 79 times [2019-12-26 20:48:23,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:23,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473085279] [2019-12-26 20:48:23,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:23,630 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 20:48:23,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473085279] [2019-12-26 20:48:23,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639724197] [2019-12-26 20:48:23,631 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:23,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:23,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:24,100 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 20:48:24,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:24,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:24,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481202406] [2019-12-26 20:48:24,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:24,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:24,102 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:25,608 INFO L93 Difference]: Finished difference Result 222 states and 484 transitions. [2019-12-26 20:48:25,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:48:25,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:25,610 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:48:25,610 INFO L226 Difference]: Without dead ends: 220 [2019-12-26 20:48:25,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-26 20:48:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 134. [2019-12-26 20:48:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 322 transitions. [2019-12-26 20:48:25,614 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 322 transitions. Word has length 14 [2019-12-26 20:48:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:25,614 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 322 transitions. [2019-12-26 20:48:25,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 322 transitions. [2019-12-26 20:48:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:25,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:25,615 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:25,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:25,815 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 80 times [2019-12-26 20:48:25,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:25,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121284097] [2019-12-26 20:48:25,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:25,918 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 20:48:25,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121284097] [2019-12-26 20:48:25,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115460536] [2019-12-26 20:48:25,918 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 20:48:25,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:25,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:25,961 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:25,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:26,343 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 20:48:26,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:26,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:26,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286296186] [2019-12-26 20:48:26,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:26,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:26,344 INFO L87 Difference]: Start difference. First operand 134 states and 322 transitions. Second operand 18 states. [2019-12-26 20:48:28,745 WARN L192 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-26 20:48:31,083 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-26 20:48:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:34,813 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2019-12-26 20:48:34,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:48:34,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:34,815 INFO L225 Difference]: With dead ends: 210 [2019-12-26 20:48:34,815 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:48:34,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=275, Invalid=716, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:48:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:48:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 131. [2019-12-26 20:48:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:48:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-26 20:48:34,819 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 14 [2019-12-26 20:48:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:34,819 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-26 20:48:34,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-26 20:48:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:34,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:34,820 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:35,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:35,021 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 81 times [2019-12-26 20:48:35,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:35,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964278113] [2019-12-26 20:48:35,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:35,113 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 20:48:35,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964278113] [2019-12-26 20:48:35,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845874060] [2019-12-26 20:48:35,114 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 20:48:35,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:48:35,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:35,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:35,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:35,274 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 20:48:35,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:35,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:35,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008122450] [2019-12-26 20:48:35,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:35,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:35,276 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 18 states. [2019-12-26 20:48:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:35,650 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2019-12-26 20:48:35,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:35,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:35,652 INFO L225 Difference]: With dead ends: 166 [2019-12-26 20:48:35,652 INFO L226 Difference]: Without dead ends: 165 [2019-12-26 20:48:35,652 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 20:48:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-26 20:48:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2019-12-26 20:48:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:48:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 313 transitions. [2019-12-26 20:48:35,654 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 313 transitions. Word has length 14 [2019-12-26 20:48:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:35,655 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 313 transitions. [2019-12-26 20:48:35,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 313 transitions. [2019-12-26 20:48:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:35,655 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:35,656 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:35,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:35,859 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 82 times [2019-12-26 20:48:35,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:35,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172021083] [2019-12-26 20:48:35,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:35,986 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 20:48:35,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172021083] [2019-12-26 20:48:35,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679423929] [2019-12-26 20:48:35,986 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 20:48:36,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:36,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:36,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:36,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:36,161 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 20:48:36,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:36,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:36,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229567545] [2019-12-26 20:48:36,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:36,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:36,162 INFO L87 Difference]: Start difference. First operand 134 states and 313 transitions. Second operand 18 states. [2019-12-26 20:48:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:36,752 INFO L93 Difference]: Finished difference Result 200 states and 423 transitions. [2019-12-26 20:48:36,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:48:36,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:36,754 INFO L225 Difference]: With dead ends: 200 [2019-12-26 20:48:36,754 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:48:36,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:48:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:48:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2019-12-26 20:48:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-26 20:48:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 309 transitions. [2019-12-26 20:48:36,758 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 309 transitions. Word has length 14 [2019-12-26 20:48:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:36,758 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 309 transitions. [2019-12-26 20:48:36,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 309 transitions. [2019-12-26 20:48:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:36,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:36,759 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:36,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:36,959 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 83 times [2019-12-26 20:48:36,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:36,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95165639] [2019-12-26 20:48:36,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:37,045 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 20:48:37,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95165639] [2019-12-26 20:48:37,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182301710] [2019-12-26 20:48:37,045 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 20:48:37,085 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:48:37,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:37,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:37,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:37,225 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 20:48:37,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:37,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:37,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844535055] [2019-12-26 20:48:37,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:37,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:37,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:37,227 INFO L87 Difference]: Start difference. First operand 133 states and 309 transitions. Second operand 18 states. [2019-12-26 20:48:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:37,778 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2019-12-26 20:48:37,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:48:37,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:37,780 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:48:37,780 INFO L226 Difference]: Without dead ends: 209 [2019-12-26 20:48:37,781 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 20:48:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-26 20:48:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2019-12-26 20:48:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:48:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-26 20:48:37,784 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-26 20:48:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:37,784 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-26 20:48:37,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-26 20:48:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:37,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:37,785 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:37,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:37,985 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 84 times [2019-12-26 20:48:37,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:37,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078663995] [2019-12-26 20:48:37,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:38,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078663995] [2019-12-26 20:48:38,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576112170] [2019-12-26 20:48:38,068 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 20:48:38,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:38,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:38,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:38,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:40,177 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_283 Int)) (and (<= (div (+ (* v_~j~0_283 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~j~0_283 2)) (<= c_~j~0 (+ v_~j~0_283 (* 3 c_~i~0))))) is different from true [2019-12-26 20:48:40,178 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 20:48:40,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:40,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:40,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074779397] [2019-12-26 20:48:40,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:40,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=201, Unknown=3, NotChecked=30, Total=306 [2019-12-26 20:48:40,179 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-26 20:48:41,447 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-26 20:48:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:44,074 INFO L93 Difference]: Finished difference Result 231 states and 493 transitions. [2019-12-26 20:48:44,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-26 20:48:44,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:44,076 INFO L225 Difference]: With dead ends: 231 [2019-12-26 20:48:44,076 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:48:44,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=515, Invalid=1291, Unknown=4, NotChecked=82, Total=1892 [2019-12-26 20:48:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:48:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 132. [2019-12-26 20:48:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-26 20:48:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 308 transitions. [2019-12-26 20:48:44,080 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 308 transitions. Word has length 14 [2019-12-26 20:48:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:44,080 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 308 transitions. [2019-12-26 20:48:44,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 308 transitions. [2019-12-26 20:48:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:44,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:44,081 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:44,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:44,282 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 85 times [2019-12-26 20:48:44,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:44,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127202262] [2019-12-26 20:48:44,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:44,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127202262] [2019-12-26 20:48:44,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975870474] [2019-12-26 20:48:44,381 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:44,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:44,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:47,891 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:48:47,892 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 20:48:47,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:47,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:47,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558314573] [2019-12-26 20:48:47,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:47,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-26 20:48:47,893 INFO L87 Difference]: Start difference. First operand 132 states and 308 transitions. Second operand 18 states. [2019-12-26 20:48:50,268 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-26 20:48:55,526 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-26 20:48:58,209 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:48:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:58,389 INFO L93 Difference]: Finished difference Result 225 states and 481 transitions. [2019-12-26 20:48:58,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:48:58,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:58,392 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:48:58,392 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:48:58,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=342, Invalid=846, Unknown=2, NotChecked=0, Total=1190 [2019-12-26 20:48:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:48:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 129. [2019-12-26 20:48:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-26 20:48:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 296 transitions. [2019-12-26 20:48:58,396 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 296 transitions. Word has length 14 [2019-12-26 20:48:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:58,396 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 296 transitions. [2019-12-26 20:48:58,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 296 transitions. [2019-12-26 20:48:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:58,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:58,397 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:58,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:58,601 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 86 times [2019-12-26 20:48:58,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:58,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091479556] [2019-12-26 20:48:58,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:58,700 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 20:48:58,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091479556] [2019-12-26 20:48:58,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721615933] [2019-12-26 20:48:58,700 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 20:48:58,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:58,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:58,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:58,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:00,907 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 20:49:00,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:00,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:00,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959494208] [2019-12-26 20:49:00,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:00,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:00,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:00,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=226, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:00,908 INFO L87 Difference]: Start difference. First operand 129 states and 296 transitions. Second operand 18 states. [2019-12-26 20:49:04,947 WARN L192 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-26 20:49:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:04,988 INFO L93 Difference]: Finished difference Result 227 states and 480 transitions. [2019-12-26 20:49:04,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:49:04,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:04,991 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:49:04,992 INFO L226 Difference]: Without dead ends: 225 [2019-12-26 20:49:04,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=293, Invalid=695, Unknown=4, NotChecked=0, Total=992 [2019-12-26 20:49:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-26 20:49:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2019-12-26 20:49:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-26 20:49:04,995 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-26 20:49:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:04,996 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-26 20:49:04,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-26 20:49:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:04,996 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:04,997 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:05,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:05,201 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 87 times [2019-12-26 20:49:05,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:05,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146407436] [2019-12-26 20:49:05,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:05,297 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 20:49:05,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146407436] [2019-12-26 20:49:05,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981069216] [2019-12-26 20:49:05,298 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 20:49:05,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:05,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:05,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:05,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:06,283 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:49:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:06,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:06,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:06,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005993617] [2019-12-26 20:49:06,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:06,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:06,344 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-26 20:49:06,957 WARN L192 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:49:07,165 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2019-12-26 20:49:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:08,658 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2019-12-26 20:49:08,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:49:08,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:08,660 INFO L225 Difference]: With dead ends: 232 [2019-12-26 20:49:08,660 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:49:08,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=319, Invalid=801, Unknown=2, NotChecked=0, Total=1122 [2019-12-26 20:49:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:49:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2019-12-26 20:49:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-26 20:49:08,665 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 14 [2019-12-26 20:49:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:08,665 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-26 20:49:08,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-26 20:49:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:08,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:08,666 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:08,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:08,869 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 88 times [2019-12-26 20:49:08,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:08,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057356311] [2019-12-26 20:49:08,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:08,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057356311] [2019-12-26 20:49:08,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194049480] [2019-12-26 20:49:08,960 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 20:49:09,001 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:09,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:09,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:09,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:09,183 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 20:49:09,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:09,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:09,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435543224] [2019-12-26 20:49:09,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:09,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:09,185 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 18 states. [2019-12-26 20:49:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:10,901 INFO L93 Difference]: Finished difference Result 226 states and 482 transitions. [2019-12-26 20:49:10,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:49:10,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:10,903 INFO L225 Difference]: With dead ends: 226 [2019-12-26 20:49:10,903 INFO L226 Difference]: Without dead ends: 224 [2019-12-26 20:49:10,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:49:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-26 20:49:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2019-12-26 20:49:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:49:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-26 20:49:10,907 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 14 [2019-12-26 20:49:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:10,907 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-26 20:49:10,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-26 20:49:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:10,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:10,908 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:11,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:11,110 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 89 times [2019-12-26 20:49:11,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:11,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010097497] [2019-12-26 20:49:11,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:11,204 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 20:49:11,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010097497] [2019-12-26 20:49:11,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875257425] [2019-12-26 20:49:11,205 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 20:49:11,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:49:11,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:11,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:11,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:12,030 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 20:49:12,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:12,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:12,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910891746] [2019-12-26 20:49:12,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:12,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:12,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:12,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:12,031 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 18 states. [2019-12-26 20:49:12,312 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2019-12-26 20:49:12,818 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:49:15,170 WARN L192 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:49:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:15,262 INFO L93 Difference]: Finished difference Result 228 states and 493 transitions. [2019-12-26 20:49:15,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:49:15,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:15,263 INFO L225 Difference]: With dead ends: 228 [2019-12-26 20:49:15,264 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:49:15,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:49:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2019-12-26 20:49:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:49:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 316 transitions. [2019-12-26 20:49:15,268 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 316 transitions. Word has length 14 [2019-12-26 20:49:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:15,268 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 316 transitions. [2019-12-26 20:49:15,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 316 transitions. [2019-12-26 20:49:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:15,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:15,269 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:15,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:15,472 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033424, now seen corresponding path program 90 times [2019-12-26 20:49:15,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:15,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922359390] [2019-12-26 20:49:15,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:15,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922359390] [2019-12-26 20:49:15,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493598782] [2019-12-26 20:49:15,554 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 20:49:15,596 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:49:15,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:15,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:15,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:15,756 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 20:49:15,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:15,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:15,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666502203] [2019-12-26 20:49:15,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:15,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:15,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:15,758 INFO L87 Difference]: Start difference. First operand 134 states and 316 transitions. Second operand 18 states. [2019-12-26 20:49:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:16,362 INFO L93 Difference]: Finished difference Result 231 states and 496 transitions. [2019-12-26 20:49:16,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-26 20:49:16,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:16,364 INFO L225 Difference]: With dead ends: 231 [2019-12-26 20:49:16,364 INFO L226 Difference]: Without dead ends: 229 [2019-12-26 20:49:16,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:49:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-26 20:49:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 138. [2019-12-26 20:49:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-26 20:49:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-26 20:49:16,368 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 14 [2019-12-26 20:49:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:16,368 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-26 20:49:16,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-26 20:49:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:16,369 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:16,369 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:16,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:16,572 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033517, now seen corresponding path program 91 times [2019-12-26 20:49:16,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:16,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219638165] [2019-12-26 20:49:16,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:16,678 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 20:49:16,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219638165] [2019-12-26 20:49:16,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105680767] [2019-12-26 20:49:16,678 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 20:49:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:16,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:16,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:16,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:16,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:16,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041726493] [2019-12-26 20:49:16,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:16,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:16,852 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 18 states. [2019-12-26 20:49:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:17,430 INFO L93 Difference]: Finished difference Result 244 states and 536 transitions. [2019-12-26 20:49:17,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:49:17,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:17,432 INFO L225 Difference]: With dead ends: 244 [2019-12-26 20:49:17,432 INFO L226 Difference]: Without dead ends: 242 [2019-12-26 20:49:17,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-26 20:49:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 137. [2019-12-26 20:49:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:49:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-26 20:49:17,437 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 14 [2019-12-26 20:49:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:17,438 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-26 20:49:17,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-26 20:49:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:17,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:17,439 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:17,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:17,642 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036400, now seen corresponding path program 92 times [2019-12-26 20:49:17,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:17,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880945409] [2019-12-26 20:49:17,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:17,728 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 20:49:17,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880945409] [2019-12-26 20:49:17,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444087025] [2019-12-26 20:49:17,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:17,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:17,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:17,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:17,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:17,896 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 20:49:17,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:17,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:17,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688689903] [2019-12-26 20:49:17,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:17,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:17,898 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 18 states. [2019-12-26 20:49:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:18,516 INFO L93 Difference]: Finished difference Result 244 states and 536 transitions. [2019-12-26 20:49:18,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:49:18,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:18,522 INFO L225 Difference]: With dead ends: 244 [2019-12-26 20:49:18,522 INFO L226 Difference]: Without dead ends: 242 [2019-12-26 20:49:18,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-26 20:49:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 140. [2019-12-26 20:49:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-26 20:49:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 340 transitions. [2019-12-26 20:49:18,526 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 340 transitions. Word has length 14 [2019-12-26 20:49:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:18,526 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 340 transitions. [2019-12-26 20:49:18,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 340 transitions. [2019-12-26 20:49:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:18,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:18,527 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:18,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:18,730 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122797, now seen corresponding path program 93 times [2019-12-26 20:49:18,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:18,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715750271] [2019-12-26 20:49:18,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:18,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715750271] [2019-12-26 20:49:18,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142670163] [2019-12-26 20:49:18,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:18,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:18,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:18,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:18,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:18,979 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 20:49:18,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:18,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:18,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222285399] [2019-12-26 20:49:18,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:18,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:18,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:18,981 INFO L87 Difference]: Start difference. First operand 140 states and 340 transitions. Second operand 18 states. [2019-12-26 20:49:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:19,481 INFO L93 Difference]: Finished difference Result 243 states and 532 transitions. [2019-12-26 20:49:19,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:49:19,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:19,482 INFO L225 Difference]: With dead ends: 243 [2019-12-26 20:49:19,482 INFO L226 Difference]: Without dead ends: 241 [2019-12-26 20:49:19,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-26 20:49:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 142. [2019-12-26 20:49:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:49:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-26 20:49:19,486 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 14 [2019-12-26 20:49:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:19,486 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-26 20:49:19,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-26 20:49:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:19,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:19,487 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:19,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:19,687 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122890, now seen corresponding path program 94 times [2019-12-26 20:49:19,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:19,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234910357] [2019-12-26 20:49:19,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:19,781 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 20:49:19,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234910357] [2019-12-26 20:49:19,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493333434] [2019-12-26 20:49:19,782 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:19,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:19,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:19,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:19,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:19,936 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 20:49:19,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:19,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:19,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863461689] [2019-12-26 20:49:19,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:19,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:19,938 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 18 states. [2019-12-26 20:49:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:20,295 INFO L93 Difference]: Finished difference Result 233 states and 519 transitions. [2019-12-26 20:49:20,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:20,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:20,296 INFO L225 Difference]: With dead ends: 233 [2019-12-26 20:49:20,296 INFO L226 Difference]: Without dead ends: 231 [2019-12-26 20:49:20,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:49:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-26 20:49:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2019-12-26 20:49:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:49:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 336 transitions. [2019-12-26 20:49:20,300 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 336 transitions. Word has length 14 [2019-12-26 20:49:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:20,300 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 336 transitions. [2019-12-26 20:49:20,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 336 transitions. [2019-12-26 20:49:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:20,301 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:20,301 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:20,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:20,501 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125680, now seen corresponding path program 95 times [2019-12-26 20:49:20,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:20,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528155667] [2019-12-26 20:49:20,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:20,584 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 20:49:20,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528155667] [2019-12-26 20:49:20,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786534759] [2019-12-26 20:49:20,585 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:20,634 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:20,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:20,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:20,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:20,806 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 20:49:20,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:20,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:20,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387862900] [2019-12-26 20:49:20,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:20,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:20,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:20,808 INFO L87 Difference]: Start difference. First operand 139 states and 336 transitions. Second operand 18 states. [2019-12-26 20:49:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:21,320 INFO L93 Difference]: Finished difference Result 241 states and 524 transitions. [2019-12-26 20:49:21,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:49:21,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:21,321 INFO L225 Difference]: With dead ends: 241 [2019-12-26 20:49:21,321 INFO L226 Difference]: Without dead ends: 239 [2019-12-26 20:49:21,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-26 20:49:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 143. [2019-12-26 20:49:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:49:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-26 20:49:21,325 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 14 [2019-12-26 20:49:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:21,325 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-26 20:49:21,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-26 20:49:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:21,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:21,325 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:21,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:21,526 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1175804080, now seen corresponding path program 96 times [2019-12-26 20:49:21,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:21,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750947342] [2019-12-26 20:49:21,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:21,630 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 20:49:21,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750947342] [2019-12-26 20:49:21,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383898896] [2019-12-26 20:49:21,631 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:21,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:49:21,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:21,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:21,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:23,398 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 20:49:23,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:23,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:23,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618602170] [2019-12-26 20:49:23,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:23,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:23,400 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 18 states. [2019-12-26 20:49:24,284 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:49:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:24,438 INFO L93 Difference]: Finished difference Result 251 states and 561 transitions. [2019-12-26 20:49:24,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:49:24,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:24,440 INFO L225 Difference]: With dead ends: 251 [2019-12-26 20:49:24,440 INFO L226 Difference]: Without dead ends: 249 [2019-12-26 20:49:24,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:49:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-26 20:49:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2019-12-26 20:49:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:49:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-26 20:49:24,443 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 14 [2019-12-26 20:49:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:24,444 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-26 20:49:24,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-26 20:49:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:24,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:24,444 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:24,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:24,645 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896336, now seen corresponding path program 97 times [2019-12-26 20:49:24,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:24,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585991044] [2019-12-26 20:49:24,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:24,743 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 20:49:24,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585991044] [2019-12-26 20:49:24,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545486592] [2019-12-26 20:49:24,743 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:24,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:24,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:24,924 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 20:49:24,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:24,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:24,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221188854] [2019-12-26 20:49:24,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:24,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:24,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:24,926 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 18 states. [2019-12-26 20:49:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:25,387 INFO L93 Difference]: Finished difference Result 201 states and 442 transitions. [2019-12-26 20:49:25,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:25,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:25,388 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:49:25,388 INFO L226 Difference]: Without dead ends: 199 [2019-12-26 20:49:25,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:49:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-26 20:49:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2019-12-26 20:49:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:49:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 345 transitions. [2019-12-26 20:49:25,392 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 345 transitions. Word has length 14 [2019-12-26 20:49:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:25,392 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 345 transitions. [2019-12-26 20:49:25,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 345 transitions. [2019-12-26 20:49:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:25,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:25,393 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:25,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:25,597 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 144146713, now seen corresponding path program 98 times [2019-12-26 20:49:25,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:25,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452021906] [2019-12-26 20:49:25,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:25,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452021906] [2019-12-26 20:49:25,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800194153] [2019-12-26 20:49:25,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:25,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:25,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:25,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:25,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:26,674 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 20:49:26,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:26,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:26,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864701293] [2019-12-26 20:49:26,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:26,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:26,675 INFO L87 Difference]: Start difference. First operand 142 states and 345 transitions. Second operand 18 states. [2019-12-26 20:49:27,374 WARN L192 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-26 20:49:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:27,621 INFO L93 Difference]: Finished difference Result 208 states and 454 transitions. [2019-12-26 20:49:27,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:49:27,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:27,623 INFO L225 Difference]: With dead ends: 208 [2019-12-26 20:49:27,623 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:49:27,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:49:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:49:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-26 20:49:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:49:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 341 transitions. [2019-12-26 20:49:27,627 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 341 transitions. Word has length 14 [2019-12-26 20:49:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:27,627 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 341 transitions. [2019-12-26 20:49:27,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 341 transitions. [2019-12-26 20:49:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:27,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:27,628 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:27,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:27,831 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash 144146806, now seen corresponding path program 99 times [2019-12-26 20:49:27,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:27,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370590891] [2019-12-26 20:49:27,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:27,914 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 20:49:27,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370590891] [2019-12-26 20:49:27,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815068957] [2019-12-26 20:49:27,914 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:27,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:27,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:27,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:27,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:28,098 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 20:49:28,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:28,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:28,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462670914] [2019-12-26 20:49:28,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:28,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:28,100 INFO L87 Difference]: Start difference. First operand 141 states and 341 transitions. Second operand 18 states. [2019-12-26 20:49:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:28,557 INFO L93 Difference]: Finished difference Result 205 states and 448 transitions. [2019-12-26 20:49:28,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:49:28,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:28,558 INFO L225 Difference]: With dead ends: 205 [2019-12-26 20:49:28,558 INFO L226 Difference]: Without dead ends: 204 [2019-12-26 20:49:28,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-26 20:49:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 142. [2019-12-26 20:49:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:49:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-26 20:49:28,562 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 14 [2019-12-26 20:49:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:28,562 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-26 20:49:28,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-26 20:49:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:28,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:28,562 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:28,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:28,763 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash 144233203, now seen corresponding path program 100 times [2019-12-26 20:49:28,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:28,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450458599] [2019-12-26 20:49:28,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:28,849 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 20:49:28,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450458599] [2019-12-26 20:49:28,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130646802] [2019-12-26 20:49:28,850 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:28,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:28,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:28,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:28,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:30,166 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 20:49:30,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:30,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:30,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128118319] [2019-12-26 20:49:30,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:30,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:30,168 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 18 states. [2019-12-26 20:49:30,418 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-26 20:49:31,392 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-26 20:49:31,527 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-12-26 20:49:32,241 WARN L192 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:49:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:32,345 INFO L93 Difference]: Finished difference Result 214 states and 466 transitions. [2019-12-26 20:49:32,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:49:32,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:32,346 INFO L225 Difference]: With dead ends: 214 [2019-12-26 20:49:32,347 INFO L226 Difference]: Without dead ends: 213 [2019-12-26 20:49:32,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=320, Invalid=671, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:49:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-26 20:49:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 143. [2019-12-26 20:49:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:49:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2019-12-26 20:49:32,350 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 14 [2019-12-26 20:49:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:32,351 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2019-12-26 20:49:32,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2019-12-26 20:49:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:32,351 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:32,351 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:32,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:32,552 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash 144233296, now seen corresponding path program 101 times [2019-12-26 20:49:32,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:32,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128653249] [2019-12-26 20:49:32,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:32,639 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 20:49:32,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128653249] [2019-12-26 20:49:32,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65657377] [2019-12-26 20:49:32,639 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:32,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:32,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:32,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:32,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:34,096 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 20:49:34,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:34,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:34,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890939615] [2019-12-26 20:49:34,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:34,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:34,098 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand 18 states. [2019-12-26 20:49:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:34,627 INFO L93 Difference]: Finished difference Result 227 states and 494 transitions. [2019-12-26 20:49:34,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:49:34,628 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:34,629 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:49:34,629 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:49:34,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:49:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 141. [2019-12-26 20:49:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:49:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-26 20:49:34,632 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 14 [2019-12-26 20:49:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:34,633 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-26 20:49:34,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-26 20:49:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:34,633 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:34,633 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:34,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:34,834 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 144236086, now seen corresponding path program 102 times [2019-12-26 20:49:34,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:34,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540387729] [2019-12-26 20:49:34,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:34,924 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 20:49:34,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540387729] [2019-12-26 20:49:34,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601497507] [2019-12-26 20:49:34,924 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:34,971 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:49:34,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:34,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:34,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:35,652 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 20:49:35,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:35,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:35,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172370647] [2019-12-26 20:49:35,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:35,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:35,653 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 18 states. [2019-12-26 20:49:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:36,174 INFO L93 Difference]: Finished difference Result 216 states and 465 transitions. [2019-12-26 20:49:36,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:49:36,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:36,175 INFO L225 Difference]: With dead ends: 216 [2019-12-26 20:49:36,175 INFO L226 Difference]: Without dead ends: 215 [2019-12-26 20:49:36,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=678, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:49:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-26 20:49:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2019-12-26 20:49:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:49:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-26 20:49:36,179 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 14 [2019-12-26 20:49:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:36,180 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-26 20:49:36,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-26 20:49:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:36,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:36,180 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:36,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:36,381 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 147006649, now seen corresponding path program 103 times [2019-12-26 20:49:36,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:36,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795206598] [2019-12-26 20:49:36,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:36,468 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 20:49:36,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795206598] [2019-12-26 20:49:36,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125558966] [2019-12-26 20:49:36,469 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:36,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:36,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:37,394 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 20:49:37,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:37,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:37,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591714492] [2019-12-26 20:49:37,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:37,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:37,395 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 18 states. [2019-12-26 20:49:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:39,202 INFO L93 Difference]: Finished difference Result 229 states and 497 transitions. [2019-12-26 20:49:39,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:39,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:39,204 INFO L225 Difference]: With dead ends: 229 [2019-12-26 20:49:39,204 INFO L226 Difference]: Without dead ends: 227 [2019-12-26 20:49:39,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=353, Invalid=766, Unknown=3, NotChecked=0, Total=1122 [2019-12-26 20:49:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-26 20:49:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 139. [2019-12-26 20:49:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:49:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 330 transitions. [2019-12-26 20:49:39,208 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 330 transitions. Word has length 14 [2019-12-26 20:49:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:39,208 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 330 transitions. [2019-12-26 20:49:39,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 330 transitions. [2019-12-26 20:49:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:39,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:39,209 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:39,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:39,411 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash 230123632, now seen corresponding path program 104 times [2019-12-26 20:49:39,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:39,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276962014] [2019-12-26 20:49:39,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:39,502 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 20:49:39,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276962014] [2019-12-26 20:49:39,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637847335] [2019-12-26 20:49:39,502 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:39,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:39,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:39,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:39,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:39,759 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 20:49:39,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:39,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:39,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215737746] [2019-12-26 20:49:39,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:39,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:39,761 INFO L87 Difference]: Start difference. First operand 139 states and 330 transitions. Second operand 18 states. [2019-12-26 20:49:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:41,316 INFO L93 Difference]: Finished difference Result 227 states and 485 transitions. [2019-12-26 20:49:41,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:49:41,316 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:41,317 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:49:41,317 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:49:41,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:49:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 136. [2019-12-26 20:49:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-26 20:49:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 318 transitions. [2019-12-26 20:49:41,321 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 318 transitions. Word has length 14 [2019-12-26 20:49:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:41,321 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 318 transitions. [2019-12-26 20:49:41,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 318 transitions. [2019-12-26 20:49:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:41,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:41,322 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:41,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:41,523 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1488309540, now seen corresponding path program 105 times [2019-12-26 20:49:41,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:41,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703457010] [2019-12-26 20:49:41,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:41,629 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 20:49:41,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703457010] [2019-12-26 20:49:41,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159478912] [2019-12-26 20:49:41,630 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:41,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:49:41,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:41,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:41,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:42,671 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 20:49:42,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:42,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:42,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616088155] [2019-12-26 20:49:42,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:42,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:42,673 INFO L87 Difference]: Start difference. First operand 136 states and 318 transitions. Second operand 18 states. [2019-12-26 20:49:48,327 WARN L192 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-26 20:49:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:48,464 INFO L93 Difference]: Finished difference Result 219 states and 465 transitions. [2019-12-26 20:49:48,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:49:48,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:48,465 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:49:48,465 INFO L226 Difference]: Without dead ends: 218 [2019-12-26 20:49:48,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=369, Invalid=887, Unknown=4, NotChecked=0, Total=1260 [2019-12-26 20:49:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-26 20:49:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 135. [2019-12-26 20:49:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-26 20:49:48,469 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-26 20:49:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:48,469 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-26 20:49:48,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-26 20:49:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:48,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:48,470 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:48,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:48,671 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1485541860, now seen corresponding path program 106 times [2019-12-26 20:49:48,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:48,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47359592] [2019-12-26 20:49:48,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:48,753 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 20:49:48,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47359592] [2019-12-26 20:49:48,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017603594] [2019-12-26 20:49:48,753 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:48,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:48,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:48,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:48,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:48,950 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 20:49:48,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:48,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:48,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585080491] [2019-12-26 20:49:48,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:48,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:48,951 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. [2019-12-26 20:49:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:49,428 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2019-12-26 20:49:49,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:49:49,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:49,429 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:49:49,429 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:49:49,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:49:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:49:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 136. [2019-12-26 20:49:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-26 20:49:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 318 transitions. [2019-12-26 20:49:49,432 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 318 transitions. Word has length 14 [2019-12-26 20:49:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:49,433 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 318 transitions. [2019-12-26 20:49:49,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 318 transitions. [2019-12-26 20:49:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:49,433 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:49,433 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:49,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:49,634 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1485541767, now seen corresponding path program 107 times [2019-12-26 20:49:49,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:49,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933876186] [2019-12-26 20:49:49,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:49,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933876186] [2019-12-26 20:49:49,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303145804] [2019-12-26 20:49:49,721 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:49,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:49,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:49,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:49,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:49,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:49,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:49,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069248473] [2019-12-26 20:49:49,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:49,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:49,899 INFO L87 Difference]: Start difference. First operand 136 states and 318 transitions. Second operand 18 states. [2019-12-26 20:49:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:50,393 INFO L93 Difference]: Finished difference Result 222 states and 474 transitions. [2019-12-26 20:49:50,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:49:50,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:50,394 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:49:50,394 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:49:50,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:49:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 135. [2019-12-26 20:49:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-26 20:49:50,398 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-26 20:49:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:50,398 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-26 20:49:50,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-26 20:49:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:50,399 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:50,399 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:50,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:50,600 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1485538977, now seen corresponding path program 108 times [2019-12-26 20:49:50,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:50,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635010563] [2019-12-26 20:49:50,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:50,684 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 20:49:50,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635010563] [2019-12-26 20:49:50,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514048803] [2019-12-26 20:49:50,685 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:50,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:49:50,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:50,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:50,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:50,856 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 20:49:50,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:50,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:50,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298332492] [2019-12-26 20:49:50,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:50,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:50,858 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. [2019-12-26 20:49:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:51,220 INFO L93 Difference]: Finished difference Result 219 states and 466 transitions. [2019-12-26 20:49:51,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:51,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:51,222 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:49:51,222 INFO L226 Difference]: Without dead ends: 217 [2019-12-26 20:49:51,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:49:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-26 20:49:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 134. [2019-12-26 20:49:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:49:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 310 transitions. [2019-12-26 20:49:51,226 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 310 transitions. Word has length 14 [2019-12-26 20:49:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:51,226 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 310 transitions. [2019-12-26 20:49:51,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 310 transitions. [2019-12-26 20:49:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:51,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:51,227 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:51,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:51,427 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1485538884, now seen corresponding path program 109 times [2019-12-26 20:49:51,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:51,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419520646] [2019-12-26 20:49:51,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:51,525 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 20:49:51,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419520646] [2019-12-26 20:49:51,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628060489] [2019-12-26 20:49:51,526 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:51,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:51,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:51,691 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 20:49:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132116987] [2019-12-26 20:49:51,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:51,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:51,693 INFO L87 Difference]: Start difference. First operand 134 states and 310 transitions. Second operand 18 states. [2019-12-26 20:49:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:52,174 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2019-12-26 20:49:52,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:49:52,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:52,176 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:49:52,176 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:49:52,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:49:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 134. [2019-12-26 20:49:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-26 20:49:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 310 transitions. [2019-12-26 20:49:52,179 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 310 transitions. Word has length 14 [2019-12-26 20:49:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:52,180 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 310 transitions. [2019-12-26 20:49:52,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 310 transitions. [2019-12-26 20:49:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:52,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:52,180 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:52,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:52,381 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1485452487, now seen corresponding path program 110 times [2019-12-26 20:49:52,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:52,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539585563] [2019-12-26 20:49:52,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:52,472 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 20:49:52,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539585563] [2019-12-26 20:49:52,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766157166] [2019-12-26 20:49:52,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:52,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:52,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:52,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:52,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:52,688 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 20:49:52,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:52,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:52,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380723530] [2019-12-26 20:49:52,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:52,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:52,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:52,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:52,689 INFO L87 Difference]: Start difference. First operand 134 states and 310 transitions. Second operand 18 states. [2019-12-26 20:49:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:53,624 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2019-12-26 20:49:53,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:49:53,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:53,626 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:49:53,626 INFO L226 Difference]: Without dead ends: 217 [2019-12-26 20:49:53,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-26 20:49:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 135. [2019-12-26 20:49:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-26 20:49:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 314 transitions. [2019-12-26 20:49:53,631 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 314 transitions. Word has length 14 [2019-12-26 20:49:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:53,631 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 314 transitions. [2019-12-26 20:49:53,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 314 transitions. [2019-12-26 20:49:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:53,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:53,632 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:53,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:53,836 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1485452394, now seen corresponding path program 111 times [2019-12-26 20:49:53,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:53,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718378443] [2019-12-26 20:49:53,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:53,977 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 20:49:53,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718378443] [2019-12-26 20:49:53,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169422291] [2019-12-26 20:49:53,977 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:54,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:54,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:54,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:54,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:54,429 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 20:49:54,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:54,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:54,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660926776] [2019-12-26 20:49:54,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:54,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:54,430 INFO L87 Difference]: Start difference. First operand 135 states and 314 transitions. Second operand 18 states. [2019-12-26 20:49:55,216 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-12-26 20:49:56,002 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:49:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:56,024 INFO L93 Difference]: Finished difference Result 217 states and 461 transitions. [2019-12-26 20:49:56,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:49:56,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:56,026 INFO L225 Difference]: With dead ends: 217 [2019-12-26 20:49:56,026 INFO L226 Difference]: Without dead ends: 215 [2019-12-26 20:49:56,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:49:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-26 20:49:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 131. [2019-12-26 20:49:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:49:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 298 transitions. [2019-12-26 20:49:56,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 298 transitions. Word has length 14 [2019-12-26 20:49:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:56,031 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 298 transitions. [2019-12-26 20:49:56,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 298 transitions. [2019-12-26 20:49:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:56,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:56,031 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:56,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:56,235 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1402422087, now seen corresponding path program 112 times [2019-12-26 20:49:56,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:56,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840962272] [2019-12-26 20:49:56,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:56,332 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 20:49:56,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840962272] [2019-12-26 20:49:56,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118633856] [2019-12-26 20:49:56,333 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:56,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:56,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:56,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:56,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:56,938 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:49:56,984 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 20:49:56,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:56,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:56,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442671743] [2019-12-26 20:49:56,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:56,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:56,985 INFO L87 Difference]: Start difference. First operand 131 states and 298 transitions. Second operand 18 states. [2019-12-26 20:49:58,746 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:49:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:59,084 INFO L93 Difference]: Finished difference Result 222 states and 465 transitions. [2019-12-26 20:49:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:49:59,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:59,085 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:49:59,086 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:49:59,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=928, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:49:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 131. [2019-12-26 20:49:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-26 20:49:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 298 transitions. [2019-12-26 20:49:59,090 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 298 transitions. Word has length 14 [2019-12-26 20:49:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:59,091 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 298 transitions. [2019-12-26 20:49:59,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 298 transitions. [2019-12-26 20:49:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:59,091 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:59,092 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:59,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:59,293 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1402332621, now seen corresponding path program 113 times [2019-12-26 20:49:59,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:59,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83465692] [2019-12-26 20:49:59,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:59,422 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 20:49:59,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83465692] [2019-12-26 20:49:59,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823484782] [2019-12-26 20:49:59,422 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:59,466 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:59,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:59,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:59,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:00,050 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:50:00,383 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 20:50:00,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:00,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:00,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406370066] [2019-12-26 20:50:00,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:00,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:00,385 INFO L87 Difference]: Start difference. First operand 131 states and 298 transitions. Second operand 18 states. [2019-12-26 20:50:00,893 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-26 20:50:01,545 WARN L192 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-26 20:50:02,083 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-26 20:50:02,631 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-26 20:50:03,971 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:50:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:04,238 INFO L93 Difference]: Finished difference Result 215 states and 443 transitions. [2019-12-26 20:50:04,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:50:04,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:04,239 INFO L225 Difference]: With dead ends: 215 [2019-12-26 20:50:04,239 INFO L226 Difference]: Without dead ends: 214 [2019-12-26 20:50:04,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:50:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-26 20:50:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 128. [2019-12-26 20:50:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-26 20:50:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2019-12-26 20:50:04,244 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 14 [2019-12-26 20:50:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:04,244 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2019-12-26 20:50:04,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2019-12-26 20:50:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:04,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:04,245 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:04,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:04,448 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1399562151, now seen corresponding path program 114 times [2019-12-26 20:50:04,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:04,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433186031] [2019-12-26 20:50:04,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:04,535 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 20:50:04,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433186031] [2019-12-26 20:50:04,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154274330] [2019-12-26 20:50:04,536 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:04,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:50:04,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:04,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:50:04,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:04,718 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 20:50:04,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:04,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:04,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455174964] [2019-12-26 20:50:04,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:04,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:04,720 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand 18 states. [2019-12-26 20:50:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:05,391 INFO L93 Difference]: Finished difference Result 196 states and 403 transitions. [2019-12-26 20:50:05,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:50:05,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:05,393 INFO L225 Difference]: With dead ends: 196 [2019-12-26 20:50:05,393 INFO L226 Difference]: Without dead ends: 195 [2019-12-26 20:50:05,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:50:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-26 20:50:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 124. [2019-12-26 20:50:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-26 20:50:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 270 transitions. [2019-12-26 20:50:05,396 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 270 transitions. Word has length 14 [2019-12-26 20:50:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:05,396 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 270 transitions. [2019-12-26 20:50:05,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 270 transitions. [2019-12-26 20:50:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:05,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:05,397 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:05,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:05,601 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1104931250, now seen corresponding path program 8 times [2019-12-26 20:50:05,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:05,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539604045] [2019-12-26 20:50:05,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:05,777 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 20:50:05,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539604045] [2019-12-26 20:50:05,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089226087] [2019-12-26 20:50:05,778 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:05,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:50:05,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:05,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:50:05,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:06,062 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 20:50:06,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:06,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:50:06,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004295122] [2019-12-26 20:50:06,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:50:06,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:50:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:50:06,064 INFO L87 Difference]: Start difference. First operand 124 states and 270 transitions. Second operand 20 states. [2019-12-26 20:50:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:06,287 INFO L93 Difference]: Finished difference Result 150 states and 320 transitions. [2019-12-26 20:50:06,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:50:06,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2019-12-26 20:50:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:06,289 INFO L225 Difference]: With dead ends: 150 [2019-12-26 20:50:06,291 INFO L226 Difference]: Without dead ends: 149 [2019-12-26 20:50:06,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:50:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-26 20:50:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 132. [2019-12-26 20:50:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-26 20:50:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 298 transitions. [2019-12-26 20:50:06,294 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 298 transitions. Word has length 14 [2019-12-26 20:50:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:06,294 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 298 transitions. [2019-12-26 20:50:06,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:50:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 298 transitions. [2019-12-26 20:50:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:50:06,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:06,295 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:06,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:06,504 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash -113301304, now seen corresponding path program 9 times [2019-12-26 20:50:06,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:06,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099714992] [2019-12-26 20:50:06,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:06,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099714992] [2019-12-26 20:50:06,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678356613] [2019-12-26 20:50:06,607 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:06,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-26 20:50:06,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:06,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:50:06,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:06,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:06,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2019-12-26 20:50:06,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420503741] [2019-12-26 20:50:06,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:50:06,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:50:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:50:06,824 INFO L87 Difference]: Start difference. First operand 132 states and 298 transitions. Second operand 22 states. [2019-12-26 20:50:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:07,084 INFO L93 Difference]: Finished difference Result 161 states and 340 transitions. [2019-12-26 20:50:07,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:50:07,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15 [2019-12-26 20:50:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:07,085 INFO L225 Difference]: With dead ends: 161 [2019-12-26 20:50:07,085 INFO L226 Difference]: Without dead ends: 160 [2019-12-26 20:50:07,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:50:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-26 20:50:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 137. [2019-12-26 20:50:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:50:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 312 transitions. [2019-12-26 20:50:07,088 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 312 transitions. Word has length 15 [2019-12-26 20:50:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:07,088 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 312 transitions. [2019-12-26 20:50:07,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:50:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 312 transitions. [2019-12-26 20:50:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:50:07,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:07,089 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:07,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:07,290 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash -139290526, now seen corresponding path program 115 times [2019-12-26 20:50:07,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:07,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721313537] [2019-12-26 20:50:07,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:07,393 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 20:50:07,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721313537] [2019-12-26 20:50:07,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345808188] [2019-12-26 20:50:07,393 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:07,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:50:07,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:07,599 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 20:50:07,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:07,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:50:07,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767300657] [2019-12-26 20:50:07,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:50:07,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:50:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:50:07,601 INFO L87 Difference]: Start difference. First operand 137 states and 312 transitions. Second operand 20 states. [2019-12-26 20:50:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:08,080 INFO L93 Difference]: Finished difference Result 194 states and 409 transitions. [2019-12-26 20:50:08,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:50:08,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-26 20:50:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:08,081 INFO L225 Difference]: With dead ends: 194 [2019-12-26 20:50:08,081 INFO L226 Difference]: Without dead ends: 193 [2019-12-26 20:50:08,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:50:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-26 20:50:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 137. [2019-12-26 20:50:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:50:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 312 transitions. [2019-12-26 20:50:08,086 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 312 transitions. Word has length 15 [2019-12-26 20:50:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:08,086 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 312 transitions. [2019-12-26 20:50:08,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:50:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 312 transitions. [2019-12-26 20:50:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:50:08,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:08,087 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:08,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:08,291 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -919779169, now seen corresponding path program 116 times [2019-12-26 20:50:08,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:08,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393337859] [2019-12-26 20:50:08,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:08,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393337859] [2019-12-26 20:50:08,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708838499] [2019-12-26 20:50:08,393 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:08,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:50:08,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:08,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:50:08,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:08,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:08,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:50:08,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481626206] [2019-12-26 20:50:08,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:50:08,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:50:08,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:50:08,609 INFO L87 Difference]: Start difference. First operand 137 states and 312 transitions. Second operand 20 states. [2019-12-26 20:50:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:09,129 INFO L93 Difference]: Finished difference Result 208 states and 438 transitions. [2019-12-26 20:50:09,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:50:09,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-26 20:50:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:09,131 INFO L225 Difference]: With dead ends: 208 [2019-12-26 20:50:09,131 INFO L226 Difference]: Without dead ends: 207 [2019-12-26 20:50:09,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:50:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-26 20:50:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 137. [2019-12-26 20:50:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-26 20:50:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 312 transitions. [2019-12-26 20:50:09,134 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 312 transitions. Word has length 15 [2019-12-26 20:50:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:09,134 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 312 transitions. [2019-12-26 20:50:09,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:50:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 312 transitions. [2019-12-26 20:50:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:50:09,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:09,139 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:09,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:09,343 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:09,343 INFO L82 PathProgramCache]: Analyzing trace with hash -919779076, now seen corresponding path program 117 times [2019-12-26 20:50:09,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:09,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265870362] [2019-12-26 20:50:09,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:09,447 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 20:50:09,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265870362] [2019-12-26 20:50:09,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766075114] [2019-12-26 20:50:09,448 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:09,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:50:09,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:09,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:50:09,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:10,455 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:50:10,456 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 20:50:10,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:10,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-26 20:50:10,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566141481] [2019-12-26 20:50:10,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:50:10,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:50:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=292, Unknown=1, NotChecked=0, Total=380 [2019-12-26 20:50:10,458 INFO L87 Difference]: Start difference. First operand 137 states and 312 transitions. Second operand 20 states. Received shutdown request... [2019-12-26 20:50:11,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:50:11,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:11,973 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-26 20:50:11,978 WARN L227 ceAbstractionStarter]: Timeout [2019-12-26 20:50:11,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:50:11 BasicIcfg [2019-12-26 20:50:11,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:50:11,980 INFO L168 Benchmark]: Toolchain (without parser) took 284456.59 ms. Allocated memory was 135.8 MB in the beginning and 182.5 MB in the end (delta: 46.7 MB). Free memory was 99.5 MB in the beginning and 110.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,980 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.32 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 157.9 MB in the end (delta: -58.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.15 ms. Allocated memory is still 200.8 MB. Free memory was 157.9 MB in the beginning and 155.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,981 INFO L168 Benchmark]: Boogie Preprocessor took 30.41 ms. Allocated memory is still 200.8 MB. Free memory was 155.8 MB in the beginning and 154.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,982 INFO L168 Benchmark]: RCFGBuilder took 407.25 ms. Allocated memory is still 200.8 MB. Free memory was 154.4 MB in the beginning and 134.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,987 INFO L168 Benchmark]: TraceAbstraction took 283245.89 ms. Allocated memory was 200.8 MB in the beginning and 182.5 MB in the end (delta: -18.4 MB). Free memory was 133.7 MB in the beginning and 110.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:11,990 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 716.32 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 99.1 MB in the beginning and 157.9 MB in the end (delta: -58.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.15 ms. Allocated memory is still 200.8 MB. Free memory was 157.9 MB in the beginning and 155.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.41 ms. Allocated memory is still 200.8 MB. Free memory was 155.8 MB in the beginning and 154.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.25 ms. Allocated memory is still 200.8 MB. Free memory was 154.4 MB in the beginning and 134.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283245.89 ms. Allocated memory was 200.8 MB in the beginning and 182.5 MB in the end (delta: -18.4 MB). Free memory was 133.7 MB in the beginning and 110.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 441 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 695 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (137states) and FLOYD_HOARE automaton (currently 14 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 32 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.1s, OverallIterations: 135, TraceHistogramMax: 9, AutomataDifference: 161.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1226 SDtfs, 25941 SDslu, 12995 SDs, 0 SdLazy, 7440 SolverSat, 4491 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 50.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4046 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 3410 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20537 ImplicationChecksByTransitivity, 189.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 134 MinimizatonAttempts, 7420 StatesRemovedByMinimization, 133 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 85.3s InterpolantComputationTime, 3413 NumberOfCodeBlocks, 3413 NumberOfCodeBlocksAsserted, 443 NumberOfCheckSat, 3148 ConstructedInterpolants, 119 QuantifiedInterpolants, 482848 SizeOfPredicates, 2 NumberOfNonLiveVariables, 12195 ConjunctsInSsa, 1455 ConjunctsInUnsatCore, 265 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2308 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