/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:17:59,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:17:59,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:17:59,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:17:59,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:17:59,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:17:59,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:17:59,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:17:59,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:17:59,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:17:59,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:17:59,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:17:59,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:17:59,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:17:59,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:17:59,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:17:59,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:17:59,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:17:59,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:17:59,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:17:59,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:17:59,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:17:59,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:17:59,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:17:59,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:17:59,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:17:59,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:17:59,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:17:59,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:17:59,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:17:59,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:17:59,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:17:59,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:17:59,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:17:59,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:17:59,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:17:59,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:17:59,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:17:59,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:17:59,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:17:59,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:17:59,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-04-18 03:17:59,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:17:59,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:17:59,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:17:59,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:17:59,290 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:17:59,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:17:59,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:17:59,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:17:59,291 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:17:59,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:17:59,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:17:59,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:17:59,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:17:59,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:17:59,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:17:59,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:17:59,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:17:59,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:17:59,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:17:59,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:17:59,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:17:59,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:17:59,294 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:17:59,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:17:59,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:17:59,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:17:59,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:17:59,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:17:59,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:17:59,642 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:17:59,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-18 03:17:59,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed20bc51/7f1ea9149dc6484384a812b3a7efacf7/FLAGbe796dab2 [2020-04-18 03:18:00,239 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:18:00,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-04-18 03:18:00,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed20bc51/7f1ea9149dc6484384a812b3a7efacf7/FLAGbe796dab2 [2020-04-18 03:18:00,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed20bc51/7f1ea9149dc6484384a812b3a7efacf7 [2020-04-18 03:18:00,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:18:00,570 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:18:00,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:18:00,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:18:00,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:18:00,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:18:00" (1/1) ... [2020-04-18 03:18:00,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696d7586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:00, skipping insertion in model container [2020-04-18 03:18:00,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:18:00" (1/1) ... [2020-04-18 03:18:00,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:18:00,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:18:01,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:18:01,104 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:18:01,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:18:01,241 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:18:01,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01 WrapperNode [2020-04-18 03:18:01,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:18:01,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:18:01,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:18:01,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:18:01,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:18:01,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:18:01,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:18:01,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:18:01,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (1/1) ... [2020-04-18 03:18:01,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:18:01,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:18:01,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:18:01,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:18:01,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (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 [2020-04-18 03:18:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:18:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:18:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:18:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:18:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:18:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:18:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:18:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:18:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:18:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:18:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:18:01,405 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 03:18:01,794 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:18:01,794 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:18:01,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:18:01 BoogieIcfgContainer [2020-04-18 03:18:01,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:18:01,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:18:01,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:18:01,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:18:01,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:18:00" (1/3) ... [2020-04-18 03:18:01,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b290a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:18:01, skipping insertion in model container [2020-04-18 03:18:01,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:18:01" (2/3) ... [2020-04-18 03:18:01,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b290a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:18:01, skipping insertion in model container [2020-04-18 03:18:01,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:18:01" (3/3) ... [2020-04-18 03:18:01,807 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-04-18 03:18:01,818 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:18:01,818 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:18:01,825 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:18:01,826 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:18:01,859 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,859 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,859 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,860 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,861 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,861 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,862 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,862 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,862 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,863 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,863 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,863 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,864 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,864 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,864 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,865 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,866 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,866 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,867 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,867 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,867 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,867 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,868 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,868 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,869 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,869 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,869 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,869 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,873 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,873 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,874 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,874 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,874 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,874 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,880 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,881 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,881 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,881 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,881 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,882 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:18:01,895 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:18:01,913 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:18:01,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:18:01,913 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:18:01,914 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:18:01,914 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:18:01,914 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:18:01,914 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:18:01,914 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:18:01,927 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 03:18:02,015 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1444 states. [2020-04-18 03:18:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states. [2020-04-18 03:18:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:18:02,029 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:02,030 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:02,031 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-04-18 03:18:02,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:02,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247392987] [2020-04-18 03:18:02,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:02,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247392987] [2020-04-18 03:18:02,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:02,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:18:02,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889106874] [2020-04-18 03:18:02,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:18:02,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:18:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:18:02,553 INFO L87 Difference]: Start difference. First operand 1444 states. Second operand 6 states. [2020-04-18 03:18:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:02,854 INFO L93 Difference]: Finished difference Result 3231 states and 9379 transitions. [2020-04-18 03:18:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:18:02,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:18:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:02,884 INFO L225 Difference]: With dead ends: 3231 [2020-04-18 03:18:02,885 INFO L226 Difference]: Without dead ends: 1015 [2020-04-18 03:18:02,887 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:18:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-04-18 03:18:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 755. [2020-04-18 03:18:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-04-18 03:18:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2044 transitions. [2020-04-18 03:18:03,006 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2044 transitions. Word has length 22 [2020-04-18 03:18:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:03,007 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 2044 transitions. [2020-04-18 03:18:03,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:18:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2044 transitions. [2020-04-18 03:18:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 03:18:03,011 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:03,012 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:03,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1846891054, now seen corresponding path program 1 times [2020-04-18 03:18:03,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:03,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188539353] [2020-04-18 03:18:03,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:03,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188539353] [2020-04-18 03:18:03,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:03,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:18:03,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900869805] [2020-04-18 03:18:03,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:18:03,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:18:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:18:03,204 INFO L87 Difference]: Start difference. First operand 755 states and 2044 transitions. Second operand 6 states. [2020-04-18 03:18:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:03,309 INFO L93 Difference]: Finished difference Result 967 states and 2556 transitions. [2020-04-18 03:18:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 03:18:03,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-04-18 03:18:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:03,316 INFO L225 Difference]: With dead ends: 967 [2020-04-18 03:18:03,316 INFO L226 Difference]: Without dead ends: 751 [2020-04-18 03:18:03,317 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:18:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-04-18 03:18:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2020-04-18 03:18:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-04-18 03:18:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1754 transitions. [2020-04-18 03:18:03,346 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1754 transitions. Word has length 26 [2020-04-18 03:18:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:03,346 INFO L479 AbstractCegarLoop]: Abstraction has 644 states and 1754 transitions. [2020-04-18 03:18:03,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:18:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1754 transitions. [2020-04-18 03:18:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 03:18:03,349 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:03,349 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:03,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1106394582, now seen corresponding path program 1 times [2020-04-18 03:18:03,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:03,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718371320] [2020-04-18 03:18:03,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:03,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718371320] [2020-04-18 03:18:03,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:03,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:18:03,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772230469] [2020-04-18 03:18:03,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:18:03,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:18:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:18:03,554 INFO L87 Difference]: Start difference. First operand 644 states and 1754 transitions. Second operand 6 states. [2020-04-18 03:18:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:03,678 INFO L93 Difference]: Finished difference Result 1623 states and 4312 transitions. [2020-04-18 03:18:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 03:18:03,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-04-18 03:18:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:03,692 INFO L225 Difference]: With dead ends: 1623 [2020-04-18 03:18:03,692 INFO L226 Difference]: Without dead ends: 1367 [2020-04-18 03:18:03,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-18 03:18:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2020-04-18 03:18:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 818. [2020-04-18 03:18:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2020-04-18 03:18:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2217 transitions. [2020-04-18 03:18:03,739 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2217 transitions. Word has length 26 [2020-04-18 03:18:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:03,740 INFO L479 AbstractCegarLoop]: Abstraction has 818 states and 2217 transitions. [2020-04-18 03:18:03,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:18:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2217 transitions. [2020-04-18 03:18:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 03:18:03,743 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:03,744 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:03,744 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:03,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1917752336, now seen corresponding path program 2 times [2020-04-18 03:18:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:03,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876867378] [2020-04-18 03:18:03,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:03,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876867378] [2020-04-18 03:18:03,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:03,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:18:03,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557014476] [2020-04-18 03:18:03,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:18:03,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:03,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:18:03,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:18:03,894 INFO L87 Difference]: Start difference. First operand 818 states and 2217 transitions. Second operand 6 states. [2020-04-18 03:18:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:04,051 INFO L93 Difference]: Finished difference Result 1095 states and 2833 transitions. [2020-04-18 03:18:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 03:18:04,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-04-18 03:18:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:04,057 INFO L225 Difference]: With dead ends: 1095 [2020-04-18 03:18:04,058 INFO L226 Difference]: Without dead ends: 770 [2020-04-18 03:18:04,058 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:18:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-04-18 03:18:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 678. [2020-04-18 03:18:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-04-18 03:18:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1810 transitions. [2020-04-18 03:18:04,082 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1810 transitions. Word has length 26 [2020-04-18 03:18:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:04,082 INFO L479 AbstractCegarLoop]: Abstraction has 678 states and 1810 transitions. [2020-04-18 03:18:04,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:18:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1810 transitions. [2020-04-18 03:18:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 03:18:04,084 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:04,084 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:04,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash -36338805, now seen corresponding path program 1 times [2020-04-18 03:18:04,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:04,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969353383] [2020-04-18 03:18:04,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:04,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969353383] [2020-04-18 03:18:04,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:04,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:18:04,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782196526] [2020-04-18 03:18:04,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:18:04,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:18:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:18:04,236 INFO L87 Difference]: Start difference. First operand 678 states and 1810 transitions. Second operand 7 states. [2020-04-18 03:18:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:04,395 INFO L93 Difference]: Finished difference Result 1850 states and 4858 transitions. [2020-04-18 03:18:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:18:04,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-04-18 03:18:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:04,406 INFO L225 Difference]: With dead ends: 1850 [2020-04-18 03:18:04,406 INFO L226 Difference]: Without dead ends: 1583 [2020-04-18 03:18:04,407 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:18:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2020-04-18 03:18:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 817. [2020-04-18 03:18:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-04-18 03:18:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2217 transitions. [2020-04-18 03:18:04,443 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2217 transitions. Word has length 30 [2020-04-18 03:18:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:04,444 INFO L479 AbstractCegarLoop]: Abstraction has 817 states and 2217 transitions. [2020-04-18 03:18:04,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:18:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2217 transitions. [2020-04-18 03:18:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 03:18:04,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:04,450 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:04,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1307159183, now seen corresponding path program 2 times [2020-04-18 03:18:04,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:04,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27352773] [2020-04-18 03:18:04,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:04,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27352773] [2020-04-18 03:18:04,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:04,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:18:04,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363326537] [2020-04-18 03:18:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:18:04,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:18:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:18:04,587 INFO L87 Difference]: Start difference. First operand 817 states and 2217 transitions. Second operand 7 states. [2020-04-18 03:18:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:04,760 INFO L93 Difference]: Finished difference Result 1145 states and 2985 transitions. [2020-04-18 03:18:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:18:04,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-04-18 03:18:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:04,767 INFO L225 Difference]: With dead ends: 1145 [2020-04-18 03:18:04,767 INFO L226 Difference]: Without dead ends: 809 [2020-04-18 03:18:04,768 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-18 03:18:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-04-18 03:18:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 690. [2020-04-18 03:18:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-04-18 03:18:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1833 transitions. [2020-04-18 03:18:04,792 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1833 transitions. Word has length 30 [2020-04-18 03:18:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:04,793 INFO L479 AbstractCegarLoop]: Abstraction has 690 states and 1833 transitions. [2020-04-18 03:18:04,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:18:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1833 transitions. [2020-04-18 03:18:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 03:18:04,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:04,795 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:04,795 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash -366411313, now seen corresponding path program 3 times [2020-04-18 03:18:04,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:04,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194824861] [2020-04-18 03:18:04,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:04,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194824861] [2020-04-18 03:18:04,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:18:04,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:18:04,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691045880] [2020-04-18 03:18:04,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:18:04,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:18:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:18:04,909 INFO L87 Difference]: Start difference. First operand 690 states and 1833 transitions. Second operand 7 states. [2020-04-18 03:18:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:05,069 INFO L93 Difference]: Finished difference Result 1182 states and 3051 transitions. [2020-04-18 03:18:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 03:18:05,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-04-18 03:18:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:05,076 INFO L225 Difference]: With dead ends: 1182 [2020-04-18 03:18:05,076 INFO L226 Difference]: Without dead ends: 958 [2020-04-18 03:18:05,077 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 03:18:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-04-18 03:18:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 800. [2020-04-18 03:18:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-04-18 03:18:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2163 transitions. [2020-04-18 03:18:05,104 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2163 transitions. Word has length 30 [2020-04-18 03:18:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:05,105 INFO L479 AbstractCegarLoop]: Abstraction has 800 states and 2163 transitions. [2020-04-18 03:18:05,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:18:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2163 transitions. [2020-04-18 03:18:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 03:18:05,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:05,107 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:05,107 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:05,108 INFO L82 PathProgramCache]: Analyzing trace with hash 96701453, now seen corresponding path program 1 times [2020-04-18 03:18:05,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:05,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629723944] [2020-04-18 03:18:05,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:05,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629723944] [2020-04-18 03:18:05,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443735267] [2020-04-18 03:18:05,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-18 03:18:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:05,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 03:18:05,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:05,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:05,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:05,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:05,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-04-18 03:18:05,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580336346] [2020-04-18 03:18:05,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 03:18:05,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 03:18:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:18:05,416 INFO L87 Difference]: Start difference. First operand 800 states and 2163 transitions. Second operand 10 states. [2020-04-18 03:18:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:05,635 INFO L93 Difference]: Finished difference Result 1504 states and 4019 transitions. [2020-04-18 03:18:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:18:05,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-04-18 03:18:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:05,643 INFO L225 Difference]: With dead ends: 1504 [2020-04-18 03:18:05,644 INFO L226 Difference]: Without dead ends: 1080 [2020-04-18 03:18:05,644 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:18:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-04-18 03:18:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 878. [2020-04-18 03:18:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-04-18 03:18:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2363 transitions. [2020-04-18 03:18:05,684 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2363 transitions. Word has length 35 [2020-04-18 03:18:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:05,684 INFO L479 AbstractCegarLoop]: Abstraction has 878 states and 2363 transitions. [2020-04-18 03:18:05,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 03:18:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2363 transitions. [2020-04-18 03:18:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 03:18:05,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:05,692 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:05,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:05,899 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1763598261, now seen corresponding path program 1 times [2020-04-18 03:18:05,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:05,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834181943] [2020-04-18 03:18:05,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:06,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834181943] [2020-04-18 03:18:06,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442081390] [2020-04-18 03:18:06,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-18 03:18:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:06,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 03:18:06,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:06,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:06,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:06,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-18 03:18:06,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957535668] [2020-04-18 03:18:06,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 03:18:06,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 03:18:06,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-18 03:18:06,250 INFO L87 Difference]: Start difference. First operand 878 states and 2363 transitions. Second operand 9 states. [2020-04-18 03:18:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:06,370 INFO L93 Difference]: Finished difference Result 1398 states and 3567 transitions. [2020-04-18 03:18:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:18:06,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-04-18 03:18:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:06,377 INFO L225 Difference]: With dead ends: 1398 [2020-04-18 03:18:06,378 INFO L226 Difference]: Without dead ends: 1113 [2020-04-18 03:18:06,378 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:18:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-04-18 03:18:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1008. [2020-04-18 03:18:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-04-18 03:18:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2659 transitions. [2020-04-18 03:18:06,410 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2659 transitions. Word has length 40 [2020-04-18 03:18:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:06,410 INFO L479 AbstractCegarLoop]: Abstraction has 1008 states and 2659 transitions. [2020-04-18 03:18:06,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 03:18:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2659 transitions. [2020-04-18 03:18:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 03:18:06,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:06,413 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:06,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:06,617 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash -957998823, now seen corresponding path program 2 times [2020-04-18 03:18:06,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:06,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524052101] [2020-04-18 03:18:06,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:06,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524052101] [2020-04-18 03:18:06,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671645617] [2020-04-18 03:18:06,739 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 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 [2020-04-18 03:18:06,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:06,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:06,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 03:18:06,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:06,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:06,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:06,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-04-18 03:18:06,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924765478] [2020-04-18 03:18:06,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 03:18:06,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:06,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 03:18:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:18:06,858 INFO L87 Difference]: Start difference. First operand 1008 states and 2659 transitions. Second operand 10 states. [2020-04-18 03:18:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:07,205 INFO L93 Difference]: Finished difference Result 2170 states and 5670 transitions. [2020-04-18 03:18:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 03:18:07,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-04-18 03:18:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:07,215 INFO L225 Difference]: With dead ends: 2170 [2020-04-18 03:18:07,216 INFO L226 Difference]: Without dead ends: 1583 [2020-04-18 03:18:07,216 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-04-18 03:18:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2020-04-18 03:18:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1118. [2020-04-18 03:18:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2020-04-18 03:18:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2994 transitions. [2020-04-18 03:18:07,251 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2994 transitions. Word has length 40 [2020-04-18 03:18:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:07,252 INFO L479 AbstractCegarLoop]: Abstraction has 1118 states and 2994 transitions. [2020-04-18 03:18:07,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 03:18:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2994 transitions. [2020-04-18 03:18:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 03:18:07,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:07,256 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:07,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:07,460 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1544047501, now seen corresponding path program 1 times [2020-04-18 03:18:07,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:07,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987858560] [2020-04-18 03:18:07,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:07,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987858560] [2020-04-18 03:18:07,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135092022] [2020-04-18 03:18:07,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-04-18 03:18:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:07,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:18:07,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:07,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:07,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:07,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-18 03:18:07,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167167498] [2020-04-18 03:18:07,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 03:18:07,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 03:18:07,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:18:07,740 INFO L87 Difference]: Start difference. First operand 1118 states and 2994 transitions. Second operand 10 states. [2020-04-18 03:18:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:07,957 INFO L93 Difference]: Finished difference Result 1653 states and 4192 transitions. [2020-04-18 03:18:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 03:18:07,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-04-18 03:18:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:07,966 INFO L225 Difference]: With dead ends: 1653 [2020-04-18 03:18:07,966 INFO L226 Difference]: Without dead ends: 1368 [2020-04-18 03:18:07,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:18:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2020-04-18 03:18:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1125. [2020-04-18 03:18:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2020-04-18 03:18:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3008 transitions. [2020-04-18 03:18:08,004 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3008 transitions. Word has length 45 [2020-04-18 03:18:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:08,005 INFO L479 AbstractCegarLoop]: Abstraction has 1125 states and 3008 transitions. [2020-04-18 03:18:08,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 03:18:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3008 transitions. [2020-04-18 03:18:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 03:18:08,008 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:08,008 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:08,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:08,213 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash 29322711, now seen corresponding path program 2 times [2020-04-18 03:18:08,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:08,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469538691] [2020-04-18 03:18:08,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:08,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469538691] [2020-04-18 03:18:08,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634904718] [2020-04-18 03:18:08,333 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 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 [2020-04-18 03:18:08,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:08,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:08,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:18:08,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:08,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:08,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 03:18:08,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:08,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-04-18 03:18:08,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874736917] [2020-04-18 03:18:08,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 03:18:08,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 03:18:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-04-18 03:18:08,448 INFO L87 Difference]: Start difference. First operand 1125 states and 3008 transitions. Second operand 11 states. [2020-04-18 03:18:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:08,813 INFO L93 Difference]: Finished difference Result 2195 states and 5755 transitions. [2020-04-18 03:18:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-18 03:18:08,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-04-18 03:18:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:08,823 INFO L225 Difference]: With dead ends: 2195 [2020-04-18 03:18:08,823 INFO L226 Difference]: Without dead ends: 1608 [2020-04-18 03:18:08,823 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:18:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-04-18 03:18:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 938. [2020-04-18 03:18:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-04-18 03:18:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2518 transitions. [2020-04-18 03:18:08,857 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2518 transitions. Word has length 45 [2020-04-18 03:18:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:08,857 INFO L479 AbstractCegarLoop]: Abstraction has 938 states and 2518 transitions. [2020-04-18 03:18:08,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 03:18:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2518 transitions. [2020-04-18 03:18:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 03:18:08,859 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:08,859 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:09,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:09,067 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash -778718691, now seen corresponding path program 3 times [2020-04-18 03:18:09,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:09,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412114219] [2020-04-18 03:18:09,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:09,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412114219] [2020-04-18 03:18:09,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344275242] [2020-04-18 03:18:09,220 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 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 [2020-04-18 03:18:09,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:18:09,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:09,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:18:09,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:09,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:09,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:09,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-18 03:18:09,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287226043] [2020-04-18 03:18:09,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 03:18:09,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 03:18:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-18 03:18:09,328 INFO L87 Difference]: Start difference. First operand 938 states and 2518 transitions. Second operand 11 states. [2020-04-18 03:18:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:09,482 INFO L93 Difference]: Finished difference Result 1428 states and 3662 transitions. [2020-04-18 03:18:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 03:18:09,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-04-18 03:18:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:09,490 INFO L225 Difference]: With dead ends: 1428 [2020-04-18 03:18:09,490 INFO L226 Difference]: Without dead ends: 1158 [2020-04-18 03:18:09,491 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:18:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2020-04-18 03:18:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1025. [2020-04-18 03:18:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-04-18 03:18:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2728 transitions. [2020-04-18 03:18:09,525 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2728 transitions. Word has length 45 [2020-04-18 03:18:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:09,525 INFO L479 AbstractCegarLoop]: Abstraction has 1025 states and 2728 transitions. [2020-04-18 03:18:09,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 03:18:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2728 transitions. [2020-04-18 03:18:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 03:18:09,528 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:09,528 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:09,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:09,734 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash -974846095, now seen corresponding path program 4 times [2020-04-18 03:18:09,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:09,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483896224] [2020-04-18 03:18:09,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:09,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483896224] [2020-04-18 03:18:09,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306938748] [2020-04-18 03:18:09,843 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 [2020-04-18 03:18:09,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:09,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:09,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:18:09,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:09,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:09,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:09,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:09,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-04-18 03:18:09,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027188608] [2020-04-18 03:18:09,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 03:18:09,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 03:18:09,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:18:09,983 INFO L87 Difference]: Start difference. First operand 1025 states and 2728 transitions. Second operand 12 states. [2020-04-18 03:18:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:10,454 INFO L93 Difference]: Finished difference Result 2701 states and 7044 transitions. [2020-04-18 03:18:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 03:18:10,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-04-18 03:18:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:10,467 INFO L225 Difference]: With dead ends: 2701 [2020-04-18 03:18:10,467 INFO L226 Difference]: Without dead ends: 1918 [2020-04-18 03:18:10,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2020-04-18 03:18:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2020-04-18 03:18:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1019. [2020-04-18 03:18:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-04-18 03:18:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2730 transitions. [2020-04-18 03:18:10,506 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2730 transitions. Word has length 45 [2020-04-18 03:18:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:10,506 INFO L479 AbstractCegarLoop]: Abstraction has 1019 states and 2730 transitions. [2020-04-18 03:18:10,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 03:18:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2730 transitions. [2020-04-18 03:18:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 03:18:10,509 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:10,509 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:10,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:10,713 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash 296330271, now seen corresponding path program 5 times [2020-04-18 03:18:10,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:10,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953559079] [2020-04-18 03:18:10,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953559079] [2020-04-18 03:18:10,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374188195] [2020-04-18 03:18:10,863 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 [2020-04-18 03:18:10,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:18:10,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:10,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:18:10,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:10,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-18 03:18:10,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595489161] [2020-04-18 03:18:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 03:18:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 03:18:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:18:10,984 INFO L87 Difference]: Start difference. First operand 1019 states and 2730 transitions. Second operand 12 states. [2020-04-18 03:18:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:11,195 INFO L93 Difference]: Finished difference Result 1743 states and 4392 transitions. [2020-04-18 03:18:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:18:11,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-04-18 03:18:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:11,203 INFO L225 Difference]: With dead ends: 1743 [2020-04-18 03:18:11,203 INFO L226 Difference]: Without dead ends: 1473 [2020-04-18 03:18:11,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:18:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-04-18 03:18:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1155. [2020-04-18 03:18:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2020-04-18 03:18:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3088 transitions. [2020-04-18 03:18:11,232 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3088 transitions. Word has length 50 [2020-04-18 03:18:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:11,233 INFO L479 AbstractCegarLoop]: Abstraction has 1155 states and 3088 transitions. [2020-04-18 03:18:11,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 03:18:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3088 transitions. [2020-04-18 03:18:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 03:18:11,235 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:11,235 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:11,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:11,439 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 100202867, now seen corresponding path program 6 times [2020-04-18 03:18:11,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:11,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808354139] [2020-04-18 03:18:11,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:11,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808354139] [2020-04-18 03:18:11,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229905865] [2020-04-18 03:18:11,582 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 [2020-04-18 03:18:11,660 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:18:11,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:11,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:18:11,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:11,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:11,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:11,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:11,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-04-18 03:18:11,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486573375] [2020-04-18 03:18:11,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 03:18:11,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:11,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 03:18:11,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-18 03:18:11,741 INFO L87 Difference]: Start difference. First operand 1155 states and 3088 transitions. Second operand 13 states. [2020-04-18 03:18:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:12,241 INFO L93 Difference]: Finished difference Result 2661 states and 7014 transitions. [2020-04-18 03:18:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:18:12,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-04-18 03:18:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:12,248 INFO L225 Difference]: With dead ends: 2661 [2020-04-18 03:18:12,248 INFO L226 Difference]: Without dead ends: 1878 [2020-04-18 03:18:12,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 03:18:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2020-04-18 03:18:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1088. [2020-04-18 03:18:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1088 states. [2020-04-18 03:18:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2918 transitions. [2020-04-18 03:18:12,278 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2918 transitions. Word has length 50 [2020-04-18 03:18:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:12,278 INFO L479 AbstractCegarLoop]: Abstraction has 1088 states and 2918 transitions. [2020-04-18 03:18:12,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 03:18:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2918 transitions. [2020-04-18 03:18:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-18 03:18:12,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:12,281 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:12,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:12,487 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:12,488 INFO L82 PathProgramCache]: Analyzing trace with hash 14333788, now seen corresponding path program 7 times [2020-04-18 03:18:12,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:12,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041498081] [2020-04-18 03:18:12,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:12,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041498081] [2020-04-18 03:18:12,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529092225] [2020-04-18 03:18:12,651 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:12,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:18:12,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:12,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:12,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:12,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 03:18:12,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161569187] [2020-04-18 03:18:12,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 03:18:12,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 03:18:12,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:18:12,755 INFO L87 Difference]: Start difference. First operand 1088 states and 2918 transitions. Second operand 12 states. [2020-04-18 03:18:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:12,941 INFO L93 Difference]: Finished difference Result 1628 states and 4162 transitions. [2020-04-18 03:18:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:18:12,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-04-18 03:18:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:12,946 INFO L225 Difference]: With dead ends: 1628 [2020-04-18 03:18:12,946 INFO L226 Difference]: Without dead ends: 1358 [2020-04-18 03:18:12,946 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:18:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2020-04-18 03:18:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1175. [2020-04-18 03:18:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-04-18 03:18:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3128 transitions. [2020-04-18 03:18:12,973 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3128 transitions. Word has length 55 [2020-04-18 03:18:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:12,974 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 3128 transitions. [2020-04-18 03:18:12,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 03:18:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3128 transitions. [2020-04-18 03:18:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-18 03:18:12,976 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:12,976 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:13,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:13,180 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -556445166, now seen corresponding path program 8 times [2020-04-18 03:18:13,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:13,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223699875] [2020-04-18 03:18:13,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223699875] [2020-04-18 03:18:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472053711] [2020-04-18 03:18:13,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:13,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:13,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:13,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:18:13,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:13,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:13,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:13,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:13,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-18 03:18:13,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552767862] [2020-04-18 03:18:13,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 03:18:13,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 03:18:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-18 03:18:13,445 INFO L87 Difference]: Start difference. First operand 1175 states and 3128 transitions. Second operand 13 states. [2020-04-18 03:18:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:13,972 INFO L93 Difference]: Finished difference Result 2670 states and 7004 transitions. [2020-04-18 03:18:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 03:18:13,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-04-18 03:18:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:13,980 INFO L225 Difference]: With dead ends: 2670 [2020-04-18 03:18:13,980 INFO L226 Difference]: Without dead ends: 2003 [2020-04-18 03:18:13,981 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-04-18 03:18:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2020-04-18 03:18:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1505. [2020-04-18 03:18:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-04-18 03:18:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 4148 transitions. [2020-04-18 03:18:14,019 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 4148 transitions. Word has length 55 [2020-04-18 03:18:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:14,019 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 4148 transitions. [2020-04-18 03:18:14,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 03:18:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 4148 transitions. [2020-04-18 03:18:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-18 03:18:14,023 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:14,023 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:14,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:14,233 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash -537817378, now seen corresponding path program 9 times [2020-04-18 03:18:14,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:14,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881114692] [2020-04-18 03:18:14,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:14,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881114692] [2020-04-18 03:18:14,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077390595] [2020-04-18 03:18:14,406 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 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 [2020-04-18 03:18:14,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-18 03:18:14,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:14,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:18:14,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:14,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:14,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:14,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-18 03:18:14,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471871631] [2020-04-18 03:18:14,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:18:14,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:18:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:18:14,517 INFO L87 Difference]: Start difference. First operand 1505 states and 4148 transitions. Second operand 14 states. [2020-04-18 03:18:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:14,772 INFO L93 Difference]: Finished difference Result 2243 states and 5752 transitions. [2020-04-18 03:18:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 03:18:14,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-04-18 03:18:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:14,778 INFO L225 Difference]: With dead ends: 2243 [2020-04-18 03:18:14,778 INFO L226 Difference]: Without dead ends: 1973 [2020-04-18 03:18:14,778 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2020-04-18 03:18:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1555. [2020-04-18 03:18:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2020-04-18 03:18:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 4248 transitions. [2020-04-18 03:18:14,811 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 4248 transitions. Word has length 60 [2020-04-18 03:18:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:14,812 INFO L479 AbstractCegarLoop]: Abstraction has 1555 states and 4248 transitions. [2020-04-18 03:18:14,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:18:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 4248 transitions. [2020-04-18 03:18:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-18 03:18:14,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:14,815 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:15,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:15,018 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:15,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1108596332, now seen corresponding path program 10 times [2020-04-18 03:18:15,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:15,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284392368] [2020-04-18 03:18:15,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:15,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284392368] [2020-04-18 03:18:15,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151052968] [2020-04-18 03:18:15,162 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 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 [2020-04-18 03:18:15,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:15,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:15,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 03:18:15,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:15,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:15,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:15,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:15,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-04-18 03:18:15,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756240728] [2020-04-18 03:18:15,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 03:18:15,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 03:18:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:18:15,266 INFO L87 Difference]: Start difference. First operand 1555 states and 4248 transitions. Second operand 15 states. [2020-04-18 03:18:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:15,928 INFO L93 Difference]: Finished difference Result 3021 states and 7984 transitions. [2020-04-18 03:18:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 03:18:15,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-04-18 03:18:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:15,959 INFO L225 Difference]: With dead ends: 3021 [2020-04-18 03:18:15,959 INFO L226 Difference]: Without dead ends: 2238 [2020-04-18 03:18:15,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 03:18:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2020-04-18 03:18:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1630. [2020-04-18 03:18:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-04-18 03:18:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 4498 transitions. [2020-04-18 03:18:15,993 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 4498 transitions. Word has length 60 [2020-04-18 03:18:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:15,994 INFO L479 AbstractCegarLoop]: Abstraction has 1630 states and 4498 transitions. [2020-04-18 03:18:15,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 03:18:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 4498 transitions. [2020-04-18 03:18:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-04-18 03:18:15,997 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:15,997 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:16,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:16,209 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1180337701, now seen corresponding path program 11 times [2020-04-18 03:18:16,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:16,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684485125] [2020-04-18 03:18:16,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:16,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684485125] [2020-04-18 03:18:16,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609230595] [2020-04-18 03:18:16,402 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 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 [2020-04-18 03:18:16,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-18 03:18:16,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:16,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 03:18:16,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:16,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:16,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:16,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-18 03:18:16,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212231679] [2020-04-18 03:18:16,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 03:18:16,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 03:18:16,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:18:16,484 INFO L87 Difference]: Start difference. First operand 1630 states and 4498 transitions. Second operand 15 states. [2020-04-18 03:18:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:16,754 INFO L93 Difference]: Finished difference Result 2178 states and 5722 transitions. [2020-04-18 03:18:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 03:18:16,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-04-18 03:18:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:16,759 INFO L225 Difference]: With dead ends: 2178 [2020-04-18 03:18:16,759 INFO L226 Difference]: Without dead ends: 1908 [2020-04-18 03:18:16,760 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:18:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-04-18 03:18:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1675. [2020-04-18 03:18:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1675 states. [2020-04-18 03:18:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 4588 transitions. [2020-04-18 03:18:16,793 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 4588 transitions. Word has length 65 [2020-04-18 03:18:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:16,794 INFO L479 AbstractCegarLoop]: Abstraction has 1675 states and 4588 transitions. [2020-04-18 03:18:16,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 03:18:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 4588 transitions. [2020-04-18 03:18:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-04-18 03:18:16,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:16,797 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:17,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:17,001 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1262847859, now seen corresponding path program 12 times [2020-04-18 03:18:17,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:17,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999674989] [2020-04-18 03:18:17,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:17,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999674989] [2020-04-18 03:18:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306083497] [2020-04-18 03:18:17,151 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 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 [2020-04-18 03:18:17,213 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-18 03:18:17,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:17,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 03:18:17,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:17,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:17,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:17,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:17,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-04-18 03:18:17,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483598918] [2020-04-18 03:18:17,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:18:17,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:17,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:18:17,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:18:17,280 INFO L87 Difference]: Start difference. First operand 1675 states and 4588 transitions. Second operand 16 states. [2020-04-18 03:18:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:17,959 INFO L93 Difference]: Finished difference Result 3085 states and 7990 transitions. [2020-04-18 03:18:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 03:18:17,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-04-18 03:18:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:17,963 INFO L225 Difference]: With dead ends: 3085 [2020-04-18 03:18:17,964 INFO L226 Difference]: Without dead ends: 2543 [2020-04-18 03:18:17,964 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 03:18:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2020-04-18 03:18:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1319. [2020-04-18 03:18:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-04-18 03:18:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3530 transitions. [2020-04-18 03:18:17,993 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3530 transitions. Word has length 65 [2020-04-18 03:18:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:17,993 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 3530 transitions. [2020-04-18 03:18:17,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:18:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3530 transitions. [2020-04-18 03:18:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-04-18 03:18:17,996 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:17,996 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:18,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:18,199 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash -478259491, now seen corresponding path program 13 times [2020-04-18 03:18:18,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:18,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454718008] [2020-04-18 03:18:18,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:18,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454718008] [2020-04-18 03:18:18,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834696476] [2020-04-18 03:18:18,408 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 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 [2020-04-18 03:18:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:18,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 03:18:18,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:18,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:18,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:18,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-18 03:18:18,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583022539] [2020-04-18 03:18:18,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 03:18:18,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 03:18:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:18:18,502 INFO L87 Difference]: Start difference. First operand 1319 states and 3530 transitions. Second operand 15 states. [2020-04-18 03:18:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:18,791 INFO L93 Difference]: Finished difference Result 2243 states and 5592 transitions. [2020-04-18 03:18:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:18:18,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-04-18 03:18:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:18,796 INFO L225 Difference]: With dead ends: 2243 [2020-04-18 03:18:18,797 INFO L226 Difference]: Without dead ends: 1973 [2020-04-18 03:18:18,797 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2020-04-18 03:18:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2020-04-18 03:18:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1455. [2020-04-18 03:18:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2020-04-18 03:18:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 3888 transitions. [2020-04-18 03:18:18,829 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 3888 transitions. Word has length 70 [2020-04-18 03:18:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:18,830 INFO L479 AbstractCegarLoop]: Abstraction has 1455 states and 3888 transitions. [2020-04-18 03:18:18,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 03:18:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 3888 transitions. [2020-04-18 03:18:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-04-18 03:18:18,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:18,832 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:19,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:19,043 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1964926069, now seen corresponding path program 14 times [2020-04-18 03:18:19,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:19,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259851026] [2020-04-18 03:18:19,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259851026] [2020-04-18 03:18:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873100088] [2020-04-18 03:18:19,190 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 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 [2020-04-18 03:18:19,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:19,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:19,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 03:18:19,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:19,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:19,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:19,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:19,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-18 03:18:19,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353970400] [2020-04-18 03:18:19,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:18:19,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:18:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:18:19,312 INFO L87 Difference]: Start difference. First operand 1455 states and 3888 transitions. Second operand 16 states. [2020-04-18 03:18:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:20,015 INFO L93 Difference]: Finished difference Result 2925 states and 7814 transitions. [2020-04-18 03:18:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 03:18:20,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-04-18 03:18:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:20,018 INFO L225 Difference]: With dead ends: 2925 [2020-04-18 03:18:20,018 INFO L226 Difference]: Without dead ends: 2198 [2020-04-18 03:18:20,019 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 03:18:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2020-04-18 03:18:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1328. [2020-04-18 03:18:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1328 states. [2020-04-18 03:18:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3568 transitions. [2020-04-18 03:18:20,048 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3568 transitions. Word has length 70 [2020-04-18 03:18:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:20,048 INFO L479 AbstractCegarLoop]: Abstraction has 1328 states and 3568 transitions. [2020-04-18 03:18:20,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:18:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3568 transitions. [2020-04-18 03:18:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-04-18 03:18:20,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:20,051 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:20,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:20,258 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1428526694, now seen corresponding path program 15 times [2020-04-18 03:18:20,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:20,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658463952] [2020-04-18 03:18:20,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:20,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658463952] [2020-04-18 03:18:20,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796457882] [2020-04-18 03:18:20,467 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 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 [2020-04-18 03:18:20,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-18 03:18:20,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:20,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-18 03:18:20,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:20,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:20,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:20,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 03:18:20,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19004874] [2020-04-18 03:18:20,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:18:20,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:18:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:18:20,568 INFO L87 Difference]: Start difference. First operand 1328 states and 3568 transitions. Second operand 17 states. [2020-04-18 03:18:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:20,864 INFO L93 Difference]: Finished difference Result 1968 states and 5012 transitions. [2020-04-18 03:18:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:18:20,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-04-18 03:18:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:20,866 INFO L225 Difference]: With dead ends: 1968 [2020-04-18 03:18:20,866 INFO L226 Difference]: Without dead ends: 1698 [2020-04-18 03:18:20,867 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 03:18:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2020-04-18 03:18:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1415. [2020-04-18 03:18:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1415 states. [2020-04-18 03:18:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 3778 transitions. [2020-04-18 03:18:20,889 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 3778 transitions. Word has length 75 [2020-04-18 03:18:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:20,889 INFO L479 AbstractCegarLoop]: Abstraction has 1415 states and 3778 transitions. [2020-04-18 03:18:20,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:18:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 3778 transitions. [2020-04-18 03:18:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-04-18 03:18:20,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:20,892 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:21,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:21,096 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714348, now seen corresponding path program 16 times [2020-04-18 03:18:21,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:21,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431826858] [2020-04-18 03:18:21,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:21,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431826858] [2020-04-18 03:18:21,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43401864] [2020-04-18 03:18:21,284 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 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 [2020-04-18 03:18:21,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:21,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:21,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-18 03:18:21,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:21,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:21,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:21,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:21,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 03:18:21,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554763378] [2020-04-18 03:18:21,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:18:21,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:21,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:18:21,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:18:21,414 INFO L87 Difference]: Start difference. First operand 1415 states and 3778 transitions. Second operand 17 states. [2020-04-18 03:18:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:22,154 INFO L93 Difference]: Finished difference Result 2994 states and 7800 transitions. [2020-04-18 03:18:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 03:18:22,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-04-18 03:18:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:22,157 INFO L225 Difference]: With dead ends: 2994 [2020-04-18 03:18:22,157 INFO L226 Difference]: Without dead ends: 2568 [2020-04-18 03:18:22,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=502, Invalid=1304, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 03:18:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2020-04-18 03:18:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1409. [2020-04-18 03:18:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1409 states. [2020-04-18 03:18:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3780 transitions. [2020-04-18 03:18:22,184 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3780 transitions. Word has length 75 [2020-04-18 03:18:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:22,184 INFO L479 AbstractCegarLoop]: Abstraction has 1409 states and 3780 transitions. [2020-04-18 03:18:22,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:18:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3780 transitions. [2020-04-18 03:18:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-04-18 03:18:22,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:22,187 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:22,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:22,390 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash -20157412, now seen corresponding path program 17 times [2020-04-18 03:18:22,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:22,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244088289] [2020-04-18 03:18:22,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:22,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244088289] [2020-04-18 03:18:22,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83982223] [2020-04-18 03:18:22,642 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 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 [2020-04-18 03:18:22,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-18 03:18:22,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:22,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 03:18:22,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:22,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:22,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:22,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-18 03:18:22,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801202853] [2020-04-18 03:18:22,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:18:22,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:22,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:18:22,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:18:22,762 INFO L87 Difference]: Start difference. First operand 1409 states and 3780 transitions. Second operand 18 states. [2020-04-18 03:18:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:23,113 INFO L93 Difference]: Finished difference Result 2433 states and 6042 transitions. [2020-04-18 03:18:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 03:18:23,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-04-18 03:18:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:23,116 INFO L225 Difference]: With dead ends: 2433 [2020-04-18 03:18:23,116 INFO L226 Difference]: Without dead ends: 2163 [2020-04-18 03:18:23,117 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 03:18:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2020-04-18 03:18:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1545. [2020-04-18 03:18:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2020-04-18 03:18:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 4138 transitions. [2020-04-18 03:18:23,143 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 4138 transitions. Word has length 80 [2020-04-18 03:18:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:23,143 INFO L479 AbstractCegarLoop]: Abstraction has 1545 states and 4138 transitions. [2020-04-18 03:18:23,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:18:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 4138 transitions. [2020-04-18 03:18:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-04-18 03:18:23,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:23,146 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:23,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:23,350 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 55654934, now seen corresponding path program 18 times [2020-04-18 03:18:23,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:23,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800922153] [2020-04-18 03:18:23,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:23,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800922153] [2020-04-18 03:18:23,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760076273] [2020-04-18 03:18:23,517 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 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 [2020-04-18 03:18:23,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-18 03:18:23,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:23,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 03:18:23,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:23,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:23,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:23,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:23,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-04-18 03:18:23,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386929734] [2020-04-18 03:18:23,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:18:23,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:18:23,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:18:23,633 INFO L87 Difference]: Start difference. First operand 1545 states and 4138 transitions. Second operand 19 states. [2020-04-18 03:18:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:24,518 INFO L93 Difference]: Finished difference Result 3305 states and 8730 transitions. [2020-04-18 03:18:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 03:18:24,518 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-04-18 03:18:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:24,521 INFO L225 Difference]: With dead ends: 3305 [2020-04-18 03:18:24,521 INFO L226 Difference]: Without dead ends: 2763 [2020-04-18 03:18:24,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=633, Invalid=1817, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 03:18:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2020-04-18 03:18:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2130. [2020-04-18 03:18:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2130 states. [2020-04-18 03:18:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 5898 transitions. [2020-04-18 03:18:24,550 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 5898 transitions. Word has length 80 [2020-04-18 03:18:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:24,550 INFO L479 AbstractCegarLoop]: Abstraction has 2130 states and 5898 transitions. [2020-04-18 03:18:24,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:18:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 5898 transitions. [2020-04-18 03:18:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-04-18 03:18:24,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:24,554 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:24,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:24,757 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1150416537, now seen corresponding path program 19 times [2020-04-18 03:18:24,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:24,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221793767] [2020-04-18 03:18:24,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:25,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221793767] [2020-04-18 03:18:25,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770459308] [2020-04-18 03:18:25,012 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 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 [2020-04-18 03:18:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:25,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 03:18:25,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:25,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:25,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:25,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-18 03:18:25,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772634849] [2020-04-18 03:18:25,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:18:25,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:18:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:18:25,109 INFO L87 Difference]: Start difference. First operand 2130 states and 5898 transitions. Second operand 18 states. [2020-04-18 03:18:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:25,449 INFO L93 Difference]: Finished difference Result 2778 states and 7322 transitions. [2020-04-18 03:18:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 03:18:25,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-04-18 03:18:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:25,454 INFO L225 Difference]: With dead ends: 2778 [2020-04-18 03:18:25,454 INFO L226 Difference]: Without dead ends: 2508 [2020-04-18 03:18:25,455 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 03:18:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2020-04-18 03:18:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2175. [2020-04-18 03:18:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2175 states. [2020-04-18 03:18:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 5988 transitions. [2020-04-18 03:18:25,482 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 5988 transitions. Word has length 85 [2020-04-18 03:18:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:25,482 INFO L479 AbstractCegarLoop]: Abstraction has 2175 states and 5988 transitions. [2020-04-18 03:18:25,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:18:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 5988 transitions. [2020-04-18 03:18:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-04-18 03:18:25,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:25,486 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:25,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:25,688 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -191368587, now seen corresponding path program 20 times [2020-04-18 03:18:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:25,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841619605] [2020-04-18 03:18:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:25,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841619605] [2020-04-18 03:18:25,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372151540] [2020-04-18 03:18:25,884 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 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 [2020-04-18 03:18:25,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:25,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:25,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 03:18:25,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:25,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:25,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:26,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:26,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-04-18 03:18:26,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902021665] [2020-04-18 03:18:26,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:18:26,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:18:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:18:26,006 INFO L87 Difference]: Start difference. First operand 2175 states and 5988 transitions. Second operand 20 states. [2020-04-18 03:18:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:26,923 INFO L93 Difference]: Finished difference Result 3785 states and 9790 transitions. [2020-04-18 03:18:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:18:26,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-04-18 03:18:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:26,928 INFO L225 Difference]: With dead ends: 3785 [2020-04-18 03:18:26,928 INFO L226 Difference]: Without dead ends: 3243 [2020-04-18 03:18:26,929 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=714, Invalid=2042, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 03:18:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2020-04-18 03:18:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 1619. [2020-04-18 03:18:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2020-04-18 03:18:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 4330 transitions. [2020-04-18 03:18:26,959 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 4330 transitions. Word has length 85 [2020-04-18 03:18:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:26,960 INFO L479 AbstractCegarLoop]: Abstraction has 1619 states and 4330 transitions. [2020-04-18 03:18:26,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:18:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 4330 transitions. [2020-04-18 03:18:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 03:18:26,962 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:26,963 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:27,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:27,166 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 931937947, now seen corresponding path program 21 times [2020-04-18 03:18:27,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:27,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946117635] [2020-04-18 03:18:27,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:27,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946117635] [2020-04-18 03:18:27,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016995155] [2020-04-18 03:18:27,427 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 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 [2020-04-18 03:18:27,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-18 03:18:27,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:27,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 03:18:27,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:27,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:27,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:27,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-18 03:18:27,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052330623] [2020-04-18 03:18:27,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:18:27,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:18:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:18:27,553 INFO L87 Difference]: Start difference. First operand 1619 states and 4330 transitions. Second operand 20 states. [2020-04-18 03:18:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:27,962 INFO L93 Difference]: Finished difference Result 2743 states and 6792 transitions. [2020-04-18 03:18:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 03:18:27,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-04-18 03:18:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:27,965 INFO L225 Difference]: With dead ends: 2743 [2020-04-18 03:18:27,965 INFO L226 Difference]: Without dead ends: 2473 [2020-04-18 03:18:27,966 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 03:18:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2020-04-18 03:18:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1755. [2020-04-18 03:18:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1755 states. [2020-04-18 03:18:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 4688 transitions. [2020-04-18 03:18:27,987 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 4688 transitions. Word has length 90 [2020-04-18 03:18:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:27,987 INFO L479 AbstractCegarLoop]: Abstraction has 1755 states and 4688 transitions. [2020-04-18 03:18:27,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:18:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 4688 transitions. [2020-04-18 03:18:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 03:18:27,993 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:27,993 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:28,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:28,197 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -409847177, now seen corresponding path program 22 times [2020-04-18 03:18:28,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:28,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454709845] [2020-04-18 03:18:28,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454709845] [2020-04-18 03:18:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121704292] [2020-04-18 03:18:28,438 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 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 [2020-04-18 03:18:28,496 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:28,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:28,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 03:18:28,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:28,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:28,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:28,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:28,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-04-18 03:18:28,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901726280] [2020-04-18 03:18:28,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:18:28,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:18:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:18:28,581 INFO L87 Difference]: Start difference. First operand 1755 states and 4688 transitions. Second operand 21 states. [2020-04-18 03:18:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:29,647 INFO L93 Difference]: Finished difference Result 3861 states and 10214 transitions. [2020-04-18 03:18:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 03:18:29,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-04-18 03:18:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:29,652 INFO L225 Difference]: With dead ends: 3861 [2020-04-18 03:18:29,652 INFO L226 Difference]: Without dead ends: 3078 [2020-04-18 03:18:29,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=2370, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 03:18:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2020-04-18 03:18:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1688. [2020-04-18 03:18:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-04-18 03:18:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4518 transitions. [2020-04-18 03:18:29,687 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4518 transitions. Word has length 90 [2020-04-18 03:18:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:29,688 INFO L479 AbstractCegarLoop]: Abstraction has 1688 states and 4518 transitions. [2020-04-18 03:18:29,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:18:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4518 transitions. [2020-04-18 03:18:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-04-18 03:18:29,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:29,691 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:29,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:29,895 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash -954691368, now seen corresponding path program 23 times [2020-04-18 03:18:29,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:29,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908689301] [2020-04-18 03:18:29,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:30,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908689301] [2020-04-18 03:18:30,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298964716] [2020-04-18 03:18:30,147 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 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 [2020-04-18 03:18:30,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-18 03:18:30,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:30,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 03:18:30,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:30,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:30,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:30,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-18 03:18:30,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161471419] [2020-04-18 03:18:30,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:18:30,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:18:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:18:30,235 INFO L87 Difference]: Start difference. First operand 1688 states and 4518 transitions. Second operand 20 states. [2020-04-18 03:18:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:30,741 INFO L93 Difference]: Finished difference Result 2428 states and 6162 transitions. [2020-04-18 03:18:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 03:18:30,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-04-18 03:18:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:30,746 INFO L225 Difference]: With dead ends: 2428 [2020-04-18 03:18:30,746 INFO L226 Difference]: Without dead ends: 2158 [2020-04-18 03:18:30,748 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 03:18:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2020-04-18 03:18:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1775. [2020-04-18 03:18:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1775 states. [2020-04-18 03:18:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 4728 transitions. [2020-04-18 03:18:30,782 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 4728 transitions. Word has length 95 [2020-04-18 03:18:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:30,783 INFO L479 AbstractCegarLoop]: Abstraction has 1775 states and 4728 transitions. [2020-04-18 03:18:30,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:18:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 4728 transitions. [2020-04-18 03:18:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-04-18 03:18:30,787 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:30,787 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:30,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:30,991 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash 447825942, now seen corresponding path program 24 times [2020-04-18 03:18:30,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:30,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155192847] [2020-04-18 03:18:30,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:31,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155192847] [2020-04-18 03:18:31,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738577741] [2020-04-18 03:18:31,325 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 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 [2020-04-18 03:18:31,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-18 03:18:31,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:31,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 03:18:31,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:31,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:31,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:31,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:31,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-04-18 03:18:31,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378204664] [2020-04-18 03:18:31,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 03:18:31,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 03:18:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-04-18 03:18:31,455 INFO L87 Difference]: Start difference. First operand 1775 states and 4728 transitions. Second operand 22 states. [2020-04-18 03:18:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:32,554 INFO L93 Difference]: Finished difference Result 4451 states and 11544 transitions. [2020-04-18 03:18:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-18 03:18:32,555 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-04-18 03:18:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:32,560 INFO L225 Difference]: With dead ends: 4451 [2020-04-18 03:18:32,560 INFO L226 Difference]: Without dead ends: 3668 [2020-04-18 03:18:32,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=914, Invalid=2626, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 03:18:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2020-04-18 03:18:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 1769. [2020-04-18 03:18:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-04-18 03:18:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 4730 transitions. [2020-04-18 03:18:32,589 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 4730 transitions. Word has length 95 [2020-04-18 03:18:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:32,589 INFO L479 AbstractCegarLoop]: Abstraction has 1769 states and 4730 transitions. [2020-04-18 03:18:32,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 03:18:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 4730 transitions. [2020-04-18 03:18:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-04-18 03:18:32,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:32,592 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:32,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:32,796 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1168260698, now seen corresponding path program 25 times [2020-04-18 03:18:32,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:32,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610893656] [2020-04-18 03:18:32,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:33,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610893656] [2020-04-18 03:18:33,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598087072] [2020-04-18 03:18:33,146 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 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 [2020-04-18 03:18:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:33,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 03:18:33,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:33,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:33,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:33,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-18 03:18:33,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246159243] [2020-04-18 03:18:33,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 03:18:33,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 03:18:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:18:33,306 INFO L87 Difference]: Start difference. First operand 1769 states and 4730 transitions. Second operand 21 states. [2020-04-18 03:18:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:33,809 INFO L93 Difference]: Finished difference Result 2993 states and 7392 transitions. [2020-04-18 03:18:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 03:18:33,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-04-18 03:18:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:33,812 INFO L225 Difference]: With dead ends: 2993 [2020-04-18 03:18:33,812 INFO L226 Difference]: Without dead ends: 2723 [2020-04-18 03:18:33,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 03:18:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2020-04-18 03:18:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1905. [2020-04-18 03:18:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1905 states. [2020-04-18 03:18:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 5088 transitions. [2020-04-18 03:18:33,834 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 5088 transitions. Word has length 100 [2020-04-18 03:18:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:33,835 INFO L479 AbstractCegarLoop]: Abstraction has 1905 states and 5088 transitions. [2020-04-18 03:18:33,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 03:18:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 5088 transitions. [2020-04-18 03:18:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-04-18 03:18:33,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:33,838 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:34,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:34,041 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:34,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1724189288, now seen corresponding path program 26 times [2020-04-18 03:18:34,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:34,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537052883] [2020-04-18 03:18:34,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:34,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537052883] [2020-04-18 03:18:34,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144729016] [2020-04-18 03:18:34,310 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 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 [2020-04-18 03:18:34,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:34,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:34,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 03:18:34,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:34,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:34,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:34,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:34,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-18 03:18:34,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797706743] [2020-04-18 03:18:34,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 03:18:34,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 03:18:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-04-18 03:18:34,414 INFO L87 Difference]: Start difference. First operand 1905 states and 5088 transitions. Second operand 22 states. [2020-04-18 03:18:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:35,550 INFO L93 Difference]: Finished difference Result 3825 states and 10214 transitions. [2020-04-18 03:18:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 03:18:35,551 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-04-18 03:18:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:35,558 INFO L225 Difference]: With dead ends: 3825 [2020-04-18 03:18:35,558 INFO L226 Difference]: Without dead ends: 3098 [2020-04-18 03:18:35,559 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=2473, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 03:18:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2020-04-18 03:18:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1778. [2020-04-18 03:18:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2020-04-18 03:18:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4768 transitions. [2020-04-18 03:18:35,589 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4768 transitions. Word has length 100 [2020-04-18 03:18:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:35,589 INFO L479 AbstractCegarLoop]: Abstraction has 1778 states and 4768 transitions. [2020-04-18 03:18:35,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 03:18:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4768 transitions. [2020-04-18 03:18:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-04-18 03:18:35,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:35,592 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:35,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:35,793 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1846630313, now seen corresponding path program 27 times [2020-04-18 03:18:35,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:35,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630752722] [2020-04-18 03:18:35,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:36,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630752722] [2020-04-18 03:18:36,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765661055] [2020-04-18 03:18:36,089 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 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 [2020-04-18 03:18:36,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-18 03:18:36,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:36,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-18 03:18:36,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:36,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:36,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:36,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-18 03:18:36,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460683310] [2020-04-18 03:18:36,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 03:18:36,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 03:18:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-18 03:18:36,238 INFO L87 Difference]: Start difference. First operand 1778 states and 4768 transitions. Second operand 23 states. [2020-04-18 03:18:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:36,717 INFO L93 Difference]: Finished difference Result 2568 states and 6512 transitions. [2020-04-18 03:18:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 03:18:36,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-04-18 03:18:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:36,721 INFO L225 Difference]: With dead ends: 2568 [2020-04-18 03:18:36,721 INFO L226 Difference]: Without dead ends: 2298 [2020-04-18 03:18:36,722 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 03:18:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2020-04-18 03:18:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1865. [2020-04-18 03:18:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2020-04-18 03:18:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4978 transitions. [2020-04-18 03:18:36,747 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4978 transitions. Word has length 105 [2020-04-18 03:18:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:36,748 INFO L479 AbstractCegarLoop]: Abstraction has 1865 states and 4978 transitions. [2020-04-18 03:18:36,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 03:18:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4978 transitions. [2020-04-18 03:18:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-04-18 03:18:36,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:36,750 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:36,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:36,951 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash -927414153, now seen corresponding path program 28 times [2020-04-18 03:18:36,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:36,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842084644] [2020-04-18 03:18:36,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:37,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842084644] [2020-04-18 03:18:37,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115112878] [2020-04-18 03:18:37,206 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 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 [2020-04-18 03:18:37,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:37,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:37,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-18 03:18:37,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:37,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:37,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:37,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:37,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-04-18 03:18:37,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707684923] [2020-04-18 03:18:37,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 03:18:37,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 03:18:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-04-18 03:18:37,321 INFO L87 Difference]: Start difference. First operand 1865 states and 4978 transitions. Second operand 24 states. [2020-04-18 03:18:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:38,462 INFO L93 Difference]: Finished difference Result 4425 states and 11440 transitions. [2020-04-18 03:18:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:18:38,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-04-18 03:18:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:38,468 INFO L225 Difference]: With dead ends: 4425 [2020-04-18 03:18:38,468 INFO L226 Difference]: Without dead ends: 3883 [2020-04-18 03:18:38,469 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 03:18:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2020-04-18 03:18:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 2755. [2020-04-18 03:18:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2020-04-18 03:18:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 7648 transitions. [2020-04-18 03:18:38,544 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 7648 transitions. Word has length 105 [2020-04-18 03:18:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:38,544 INFO L479 AbstractCegarLoop]: Abstraction has 2755 states and 7648 transitions. [2020-04-18 03:18:38,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 03:18:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 7648 transitions. [2020-04-18 03:18:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-04-18 03:18:38,547 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:38,548 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:38,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:38,748 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1646713689, now seen corresponding path program 29 times [2020-04-18 03:18:38,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:38,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571206289] [2020-04-18 03:18:38,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:39,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571206289] [2020-04-18 03:18:39,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785786966] [2020-04-18 03:18:39,110 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 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 [2020-04-18 03:18:39,183 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-18 03:18:39,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:39,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-18 03:18:39,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:39,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:39,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:39,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-18 03:18:39,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186674820] [2020-04-18 03:18:39,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 03:18:39,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 03:18:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-04-18 03:18:39,254 INFO L87 Difference]: Start difference. First operand 2755 states and 7648 transitions. Second operand 23 states. [2020-04-18 03:18:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:39,858 INFO L93 Difference]: Finished difference Result 3993 states and 10252 transitions. [2020-04-18 03:18:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:18:39,859 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-04-18 03:18:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:39,864 INFO L225 Difference]: With dead ends: 3993 [2020-04-18 03:18:39,864 INFO L226 Difference]: Without dead ends: 3723 [2020-04-18 03:18:39,865 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 03:18:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-04-18 03:18:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2805. [2020-04-18 03:18:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2805 states. [2020-04-18 03:18:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 7748 transitions. [2020-04-18 03:18:39,899 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 7748 transitions. Word has length 110 [2020-04-18 03:18:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:39,899 INFO L479 AbstractCegarLoop]: Abstraction has 2805 states and 7748 transitions. [2020-04-18 03:18:39,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 03:18:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 7748 transitions. [2020-04-18 03:18:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-04-18 03:18:39,902 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:39,903 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:40,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:40,103 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1729037447, now seen corresponding path program 30 times [2020-04-18 03:18:40,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:40,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688886147] [2020-04-18 03:18:40,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:40,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688886147] [2020-04-18 03:18:40,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417777589] [2020-04-18 03:18:40,375 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 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 [2020-04-18 03:18:40,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-18 03:18:40,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:40,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-18 03:18:40,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:40,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:40,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:40,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:40,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-04-18 03:18:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395570694] [2020-04-18 03:18:40,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 03:18:40,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 03:18:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:40,493 INFO L87 Difference]: Start difference. First operand 2805 states and 7748 transitions. Second operand 25 states. [2020-04-18 03:18:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:41,801 INFO L93 Difference]: Finished difference Result 4145 states and 10960 transitions. [2020-04-18 03:18:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 03:18:41,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 110 [2020-04-18 03:18:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:41,806 INFO L225 Difference]: With dead ends: 4145 [2020-04-18 03:18:41,807 INFO L226 Difference]: Without dead ends: 3603 [2020-04-18 03:18:41,808 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1212, Invalid=3344, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 03:18:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2020-04-18 03:18:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 1988. [2020-04-18 03:18:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-04-18 03:18:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5318 transitions. [2020-04-18 03:18:41,837 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5318 transitions. Word has length 110 [2020-04-18 03:18:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:41,838 INFO L479 AbstractCegarLoop]: Abstraction has 1988 states and 5318 transitions. [2020-04-18 03:18:41,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 03:18:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5318 transitions. [2020-04-18 03:18:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-04-18 03:18:41,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:41,840 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:42,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:42,041 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1295471338, now seen corresponding path program 31 times [2020-04-18 03:18:42,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:42,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487293333] [2020-04-18 03:18:42,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:42,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487293333] [2020-04-18 03:18:42,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595187213] [2020-04-18 03:18:42,365 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 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 [2020-04-18 03:18:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:42,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 03:18:42,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:42,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:42,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:42,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-18 03:18:42,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393834052] [2020-04-18 03:18:42,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 03:18:42,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 03:18:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:42,486 INFO L87 Difference]: Start difference. First operand 1988 states and 5318 transitions. Second operand 25 states. [2020-04-18 03:18:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:42,983 INFO L93 Difference]: Finished difference Result 2828 states and 7162 transitions. [2020-04-18 03:18:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:18:42,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-04-18 03:18:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:42,986 INFO L225 Difference]: With dead ends: 2828 [2020-04-18 03:18:42,987 INFO L226 Difference]: Without dead ends: 2558 [2020-04-18 03:18:42,988 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=1471, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:18:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2020-04-18 03:18:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2075. [2020-04-18 03:18:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2020-04-18 03:18:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5528 transitions. [2020-04-18 03:18:43,021 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5528 transitions. Word has length 115 [2020-04-18 03:18:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:43,021 INFO L479 AbstractCegarLoop]: Abstraction has 2075 states and 5528 transitions. [2020-04-18 03:18:43,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 03:18:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5528 transitions. [2020-04-18 03:18:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-04-18 03:18:43,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:43,025 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:43,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:43,228 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1643641960, now seen corresponding path program 32 times [2020-04-18 03:18:43,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:43,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014088681] [2020-04-18 03:18:43,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:43,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014088681] [2020-04-18 03:18:43,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208821298] [2020-04-18 03:18:43,499 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 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 [2020-04-18 03:18:43,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:18:43,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:43,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 03:18:43,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:43,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:43,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:43,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:43,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-04-18 03:18:43,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025792667] [2020-04-18 03:18:43,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 03:18:43,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:43,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 03:18:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:18:43,671 INFO L87 Difference]: Start difference. First operand 2075 states and 5528 transitions. Second operand 26 states. [2020-04-18 03:18:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:45,358 INFO L93 Difference]: Finished difference Result 5151 states and 13344 transitions. [2020-04-18 03:18:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-04-18 03:18:45,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-04-18 03:18:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:45,363 INFO L225 Difference]: With dead ends: 5151 [2020-04-18 03:18:45,363 INFO L226 Difference]: Without dead ends: 4368 [2020-04-18 03:18:45,364 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1344, Invalid=3768, Unknown=0, NotChecked=0, Total=5112 [2020-04-18 03:18:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2020-04-18 03:18:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 2069. [2020-04-18 03:18:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2020-04-18 03:18:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5530 transitions. [2020-04-18 03:18:45,399 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5530 transitions. Word has length 115 [2020-04-18 03:18:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:45,400 INFO L479 AbstractCegarLoop]: Abstraction has 2069 states and 5530 transitions. [2020-04-18 03:18:45,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 03:18:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5530 transitions. [2020-04-18 03:18:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-04-18 03:18:45,402 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:45,402 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:45,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:45,603 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1449559448, now seen corresponding path program 33 times [2020-04-18 03:18:45,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:45,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841117803] [2020-04-18 03:18:45,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:46,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841117803] [2020-04-18 03:18:46,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838427922] [2020-04-18 03:18:46,071 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 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 [2020-04-18 03:18:46,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-04-18 03:18:46,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:46,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-18 03:18:46,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:46,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:46,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:46,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-04-18 03:18:46,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347968230] [2020-04-18 03:18:46,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 03:18:46,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 03:18:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:46,255 INFO L87 Difference]: Start difference. First operand 2069 states and 5530 transitions. Second operand 25 states. [2020-04-18 03:18:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:46,837 INFO L93 Difference]: Finished difference Result 3493 states and 8592 transitions. [2020-04-18 03:18:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 03:18:46,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 120 [2020-04-18 03:18:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:46,842 INFO L225 Difference]: With dead ends: 3493 [2020-04-18 03:18:46,842 INFO L226 Difference]: Without dead ends: 3223 [2020-04-18 03:18:46,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:18:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2020-04-18 03:18:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2205. [2020-04-18 03:18:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2205 states. [2020-04-18 03:18:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 5888 transitions. [2020-04-18 03:18:46,916 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 5888 transitions. Word has length 120 [2020-04-18 03:18:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:46,918 INFO L479 AbstractCegarLoop]: Abstraction has 2205 states and 5888 transitions. [2020-04-18 03:18:46,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 03:18:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 5888 transitions. [2020-04-18 03:18:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-04-18 03:18:46,922 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:46,922 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:47,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:47,127 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1101388826, now seen corresponding path program 34 times [2020-04-18 03:18:47,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:47,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454258879] [2020-04-18 03:18:47,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:47,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454258879] [2020-04-18 03:18:47,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422581467] [2020-04-18 03:18:47,507 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 [2020-04-18 03:18:47,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:18:47,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:47,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-18 03:18:47,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:47,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:47,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:18:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:18:47,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-04-18 03:18:47,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707630874] [2020-04-18 03:18:47,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 03:18:47,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 03:18:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:18:47,710 INFO L87 Difference]: Start difference. First operand 2205 states and 5888 transitions. Second operand 26 states. [2020-04-18 03:18:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:49,264 INFO L93 Difference]: Finished difference Result 4337 states and 11510 transitions. [2020-04-18 03:18:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 03:18:49,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 120 [2020-04-18 03:18:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:49,270 INFO L225 Difference]: With dead ends: 4337 [2020-04-18 03:18:49,270 INFO L226 Difference]: Without dead ends: 3748 [2020-04-18 03:18:49,271 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1364, Invalid=3466, Unknown=0, NotChecked=0, Total=4830 [2020-04-18 03:18:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2020-04-18 03:18:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3080. [2020-04-18 03:18:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-04-18 03:18:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 8548 transitions. [2020-04-18 03:18:49,310 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 8548 transitions. Word has length 120 [2020-04-18 03:18:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:49,310 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 8548 transitions. [2020-04-18 03:18:49,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 03:18:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 8548 transitions. [2020-04-18 03:18:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-04-18 03:18:49,314 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:49,315 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:49,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:49,516 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1056175356, now seen corresponding path program 35 times [2020-04-18 03:18:49,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:49,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695616401] [2020-04-18 03:18:49,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 399 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-18 03:18:49,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695616401] [2020-04-18 03:18:49,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900351643] [2020-04-18 03:18:49,787 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 [2020-04-18 03:18:49,869 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-04-18 03:18:49,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:49,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 03:18:49,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 436 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-04-18 03:18:49,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 03:18:49,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-04-18 03:18:49,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406662172] [2020-04-18 03:18:49,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 03:18:49,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 03:18:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:49,944 INFO L87 Difference]: Start difference. First operand 3080 states and 8548 transitions. Second operand 23 states. [2020-04-18 03:18:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:50,456 INFO L93 Difference]: Finished difference Result 14273 states and 38868 transitions. [2020-04-18 03:18:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:18:50,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 125 [2020-04-18 03:18:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:50,461 INFO L225 Difference]: With dead ends: 14273 [2020-04-18 03:18:50,461 INFO L226 Difference]: Without dead ends: 1925 [2020-04-18 03:18:50,462 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 03:18:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2020-04-18 03:18:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1925. [2020-04-18 03:18:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2020-04-18 03:18:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 4945 transitions. [2020-04-18 03:18:50,500 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 4945 transitions. Word has length 125 [2020-04-18 03:18:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:50,501 INFO L479 AbstractCegarLoop]: Abstraction has 1925 states and 4945 transitions. [2020-04-18 03:18:50,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 03:18:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 4945 transitions. [2020-04-18 03:18:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-04-18 03:18:50,506 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:18:50,506 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:18:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:50,712 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:18:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:18:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1265692907, now seen corresponding path program 36 times [2020-04-18 03:18:50,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:18:50,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479318079] [2020-04-18 03:18:50,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:18:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:18:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:51,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479318079] [2020-04-18 03:18:51,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864270948] [2020-04-18 03:18:51,023 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 [2020-04-18 03:18:51,145 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-04-18 03:18:51,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:18:51,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 03:18:51,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:18:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:18:51,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 03:18:51,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-04-18 03:18:51,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303506111] [2020-04-18 03:18:51,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 03:18:51,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:18:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 03:18:51,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-04-18 03:18:51,231 INFO L87 Difference]: Start difference. First operand 1925 states and 4945 transitions. Second operand 23 states. [2020-04-18 03:18:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:18:51,649 INFO L93 Difference]: Finished difference Result 7901 states and 19925 transitions. [2020-04-18 03:18:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:18:51,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 125 [2020-04-18 03:18:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:18:51,650 INFO L225 Difference]: With dead ends: 7901 [2020-04-18 03:18:51,650 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 03:18:51,651 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 03:18:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 03:18:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 03:18:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 03:18:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 03:18:51,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125 [2020-04-18 03:18:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:18:51,652 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 03:18:51,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 03:18:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 03:18:51,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 03:18:51,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:51,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:18:51 BasicIcfg [2020-04-18 03:18:51,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:18:51,863 INFO L168 Benchmark]: Toolchain (without parser) took 51307.91 ms. Allocated memory was 136.8 MB in the beginning and 718.3 MB in the end (delta: 581.4 MB). Free memory was 100.4 MB in the beginning and 372.1 MB in the end (delta: -271.7 MB). Peak memory consumption was 309.7 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,864 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.13 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 98.4 MB in the beginning and 158.7 MB in the end (delta: -60.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.33 ms. Allocated memory is still 200.8 MB. Free memory was 158.7 MB in the beginning and 156.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,865 INFO L168 Benchmark]: Boogie Preprocessor took 37.14 ms. Allocated memory is still 200.8 MB. Free memory was 156.6 MB in the beginning and 155.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,865 INFO L168 Benchmark]: RCFGBuilder took 462.03 ms. Allocated memory is still 200.8 MB. Free memory was 154.5 MB in the beginning and 134.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,866 INFO L168 Benchmark]: TraceAbstraction took 50061.45 ms. Allocated memory was 200.8 MB in the beginning and 718.3 MB in the end (delta: 517.5 MB). Free memory was 133.7 MB in the beginning and 372.1 MB in the end (delta: -238.3 MB). Peak memory consumption was 279.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:51,868 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 671.13 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 98.4 MB in the beginning and 158.7 MB in the end (delta: -60.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.33 ms. Allocated memory is still 200.8 MB. Free memory was 158.7 MB in the beginning and 156.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.14 ms. Allocated memory is still 200.8 MB. Free memory was 156.6 MB in the beginning and 155.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 462.03 ms. Allocated memory is still 200.8 MB. Free memory was 154.5 MB in the beginning and 134.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50061.45 ms. Allocated memory was 200.8 MB in the beginning and 718.3 MB in the end (delta: 517.5 MB). Free memory was 133.7 MB in the beginning and 372.1 MB in the end (delta: -238.3 MB). Peak memory consumption was 279.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 49.9s, OverallIterations: 46, TraceHistogramMax: 11, AutomataDifference: 24.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 4265 SDtfs, 21940 SDslu, 29505 SDs, 0 SdLazy, 5840 SolverSat, 2585 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4652 GetRequests, 3117 SyntacticMatches, 23 SemanticMatches, 1512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15119 ImplicationChecksByTransitivity, 24.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3080occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 46 MinimizatonAttempts, 30168 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 6380 NumberOfCodeBlocks, 6380 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 6295 ConstructedInterpolants, 0 QuantifiedInterpolants, 2260245 SizeOfPredicates, 570 NumberOfNonLiveVariables, 6278 ConjunctsInSsa, 683 ConjunctsInUnsatCore, 85 InterpolantComputations, 9 PerfectInterpolantSequences, 1706/12080 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...