/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:31:02,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:31:02,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:31:02,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:31:02,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:31:02,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:31:02,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:31:02,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:31:02,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:31:02,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:31:02,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:31:02,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:31:02,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:31:02,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:31:02,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:31:02,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:31:02,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:31:02,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:31:02,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:31:02,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:31:02,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:31:02,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:31:02,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:31:02,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:31:02,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:31:02,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:31:02,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:31:02,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:31:02,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:31:02,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:31:02,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:31:02,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:31:02,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:31:02,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:31:02,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:31:02,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:31:02,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:31:02,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:31:02,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:31:02,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:31:02,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:31:02,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 18:31:02,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:31:02,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:31:02,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:31:02,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:31:02,321 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:31:02,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:31:02,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:31:02,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:31:02,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:31:02,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:31:02,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:31:02,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:31:02,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:31:02,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:31:02,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:31:02,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:31:02,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:31:02,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:31:02,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:31:02,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:31:02,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:31:02,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:31:02,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:31:02,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:31:02,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:31:02,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:31:02,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:31:02,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:31:02,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 18:31:02,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:31:02,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:31:02,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:31:02,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:31:02,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:31:02,661 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:31:02,662 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-04-17 18:31:02,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39f6362d/787166f9f0d749e1a56bad130f66f068/FLAG250591c84 [2020-04-17 18:31:03,324 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:31:03,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-04-17 18:31:03,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39f6362d/787166f9f0d749e1a56bad130f66f068/FLAG250591c84 [2020-04-17 18:31:03,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39f6362d/787166f9f0d749e1a56bad130f66f068 [2020-04-17 18:31:03,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:31:03,596 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:31:03,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:31:03,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:31:03,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:31:03,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:31:03" (1/1) ... [2020-04-17 18:31:03,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67de251d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:03, skipping insertion in model container [2020-04-17 18:31:03,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:31:03" (1/1) ... [2020-04-17 18:31:03,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:31:03,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:31:04,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:31:04,293 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:31:04,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:31:04,688 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:31:04,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04 WrapperNode [2020-04-17 18:31:04,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:31:04,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:31:04,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:31:04,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:31:04,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:31:04,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:31:04,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:31:04,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:31:04,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (1/1) ... [2020-04-17 18:31:04,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:31:04,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:31:04,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:31:04,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:31:04,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (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 [2020-04-17 18:31:04,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:31:04,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:31:04,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 18:31:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:31:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-17 18:31:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-04-17 18:31:04,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-04-17 18:31:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-17 18:31:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:31:04,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:31:04,928 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:31:05,346 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:31:05,346 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-04-17 18:31:05,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:31:05 BoogieIcfgContainer [2020-04-17 18:31:05,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:31:05,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:31:05,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:31:05,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:31:05,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:31:03" (1/3) ... [2020-04-17 18:31:05,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7262116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:31:05, skipping insertion in model container [2020-04-17 18:31:05,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:31:04" (2/3) ... [2020-04-17 18:31:05,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7262116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:31:05, skipping insertion in model container [2020-04-17 18:31:05,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:31:05" (3/3) ... [2020-04-17 18:31:05,359 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-04-17 18:31:05,369 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:31:05,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:31:05,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:31:05,378 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:31:05,400 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,401 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,401 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,401 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,401 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,401 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,402 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,402 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,402 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,402 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,402 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,403 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,403 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,403 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,404 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,404 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,404 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,404 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,404 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,405 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,405 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,405 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,405 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,409 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,409 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,410 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,410 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,410 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,410 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,410 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,411 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,411 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:31:05,432 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:31:05,450 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:31:05,451 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:31:05,451 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:31:05,451 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:31:05,451 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:31:05,451 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:31:05,451 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:31:05,451 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:31:05,468 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-04-17 18:31:05,470 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-04-17 18:31:05,517 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-04-17 18:31:05,517 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:31:05,522 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-04-17 18:31:05,525 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-04-17 18:31:05,549 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-04-17 18:31:05,549 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:31:05,550 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-04-17 18:31:05,552 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-04-17 18:31:05,553 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:31:07,717 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-04-17 18:31:07,863 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-04-17 18:31:08,482 WARN L192 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-04-17 18:31:08,716 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-04-17 18:31:08,724 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-04-17 18:31:08,725 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-04-17 18:31:08,729 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-04-17 18:31:08,738 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-04-17 18:31:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-17 18:31:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:31:08,748 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:08,748 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:08,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-04-17 18:31:08,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:08,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481451616] [2020-04-17 18:31:08,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:08,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481451616] [2020-04-17 18:31:08,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:31:08,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:31:08,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130549887] [2020-04-17 18:31:08,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:31:08,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:08,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:31:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:08,986 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-04-17 18:31:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:09,030 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-04-17 18:31:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:31:09,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-04-17 18:31:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:09,054 INFO L225 Difference]: With dead ends: 52 [2020-04-17 18:31:09,054 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 18:31:09,056 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 18:31:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 18:31:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:31:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-04-17 18:31:09,101 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-04-17 18:31:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:09,101 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-04-17 18:31:09,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:31:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-04-17 18:31:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:31:09,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:09,103 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:09,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-04-17 18:31:09,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:09,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658239434] [2020-04-17 18:31:09,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:09,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658239434] [2020-04-17 18:31:09,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:31:09,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:31:09,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826241300] [2020-04-17 18:31:09,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:31:09,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:31:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:09,222 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-04-17 18:31:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:09,244 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-04-17 18:31:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:31:09,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-04-17 18:31:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:09,247 INFO L225 Difference]: With dead ends: 64 [2020-04-17 18:31:09,247 INFO L226 Difference]: Without dead ends: 64 [2020-04-17 18:31:09,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:31:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-04-17 18:31:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-04-17 18:31:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:31:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-04-17 18:31:09,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-04-17 18:31:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:09,256 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-04-17 18:31:09,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:31:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-04-17 18:31:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:31:09,257 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:09,257 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:09,258 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-04-17 18:31:09,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:09,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629795636] [2020-04-17 18:31:09,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:09,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629795636] [2020-04-17 18:31:09,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470085403] [2020-04-17 18:31:09,319 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 [2020-04-17 18:31:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:09,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-04-17 18:31:09,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:09,477 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-17 18:31:09,477 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:31:09,484 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:31:09,484 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:31:09,485 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-04-17 18:31:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:09,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:31:09,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-04-17 18:31:09,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460240368] [2020-04-17 18:31:09,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:31:09,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:09,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:31:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:31:09,505 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-04-17 18:31:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:09,527 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-04-17 18:31:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:31:09,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-04-17 18:31:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:09,529 INFO L225 Difference]: With dead ends: 40 [2020-04-17 18:31:09,529 INFO L226 Difference]: Without dead ends: 40 [2020-04-17 18:31:09,530 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:31:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-04-17 18:31:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-04-17 18:31:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:31:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-04-17 18:31:09,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-04-17 18:31:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:09,536 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-04-17 18:31:09,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:31:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-04-17 18:31:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:31:09,537 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:09,537 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:09,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:09,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-04-17 18:31:09,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:09,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84078262] [2020-04-17 18:31:09,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:09,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84078262] [2020-04-17 18:31:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799570232] [2020-04-17 18:31:09,809 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:09,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:09,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:09,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-17 18:31:09,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:09,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:09,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-04-17 18:31:09,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091933465] [2020-04-17 18:31:09,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:31:09,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:31:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:31:09,932 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-04-17 18:31:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:10,094 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-04-17 18:31:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:31:10,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-04-17 18:31:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:10,099 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:31:10,099 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 18:31:10,099 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:31:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 18:31:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-04-17 18:31:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:31:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-04-17 18:31:10,109 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-04-17 18:31:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:10,109 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-04-17 18:31:10,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:31:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-04-17 18:31:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 18:31:10,111 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:10,111 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:10,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:10,321 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-04-17 18:31:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:10,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942340000] [2020-04-17 18:31:10,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:10,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942340000] [2020-04-17 18:31:10,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70487213] [2020-04-17 18:31:10,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:31:10,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:31:10,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:10,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:31:10,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-17 18:31:10,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:10,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2020-04-17 18:31:10,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747132423] [2020-04-17 18:31:10,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:31:10,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:31:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:31:10,604 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 12 states. [2020-04-17 18:31:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:10,892 INFO L93 Difference]: Finished difference Result 181 states and 256 transitions. [2020-04-17 18:31:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:31:10,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-04-17 18:31:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:10,895 INFO L225 Difference]: With dead ends: 181 [2020-04-17 18:31:10,895 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 18:31:10,896 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:31:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 18:31:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 130. [2020-04-17 18:31:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:31:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 193 transitions. [2020-04-17 18:31:10,924 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 193 transitions. Word has length 22 [2020-04-17 18:31:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:10,924 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 193 transitions. [2020-04-17 18:31:10,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:31:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 193 transitions. [2020-04-17 18:31:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 18:31:10,929 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:10,929 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:11,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:11,133 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1268402793, now seen corresponding path program 4 times [2020-04-17 18:31:11,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:11,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443885390] [2020-04-17 18:31:11,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:11,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443885390] [2020-04-17 18:31:11,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252645567] [2020-04-17 18:31:11,321 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 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 [2020-04-17 18:31:11,403 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:31:11,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:11,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:31:11,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:31:11,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:11,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-04-17 18:31:11,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290214911] [2020-04-17 18:31:11,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:31:11,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:11,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:31:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:31:11,472 INFO L87 Difference]: Start difference. First operand 130 states and 193 transitions. Second operand 13 states. [2020-04-17 18:31:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:11,993 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2020-04-17 18:31:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:31:11,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-04-17 18:31:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:11,996 INFO L225 Difference]: With dead ends: 289 [2020-04-17 18:31:11,996 INFO L226 Difference]: Without dead ends: 289 [2020-04-17 18:31:11,997 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:31:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-04-17 18:31:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 172. [2020-04-17 18:31:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 18:31:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 258 transitions. [2020-04-17 18:31:12,025 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 258 transitions. Word has length 25 [2020-04-17 18:31:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:12,026 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 258 transitions. [2020-04-17 18:31:12,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:31:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 258 transitions. [2020-04-17 18:31:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:31:12,033 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:12,034 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:12,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:12,240 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 5 times [2020-04-17 18:31:12,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:12,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684127467] [2020-04-17 18:31:12,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:12,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684127467] [2020-04-17 18:31:12,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777613597] [2020-04-17 18:31:12,446 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 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 [2020-04-17 18:31:12,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:31:12,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:12,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:31:12,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-17 18:31:12,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:12,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-04-17 18:31:12,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466208011] [2020-04-17 18:31:12,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:31:12,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:31:12,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:31:12,623 INFO L87 Difference]: Start difference. First operand 172 states and 258 transitions. Second operand 15 states. [2020-04-17 18:31:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:13,084 INFO L93 Difference]: Finished difference Result 297 states and 412 transitions. [2020-04-17 18:31:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:31:13,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-04-17 18:31:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:13,087 INFO L225 Difference]: With dead ends: 297 [2020-04-17 18:31:13,087 INFO L226 Difference]: Without dead ends: 297 [2020-04-17 18:31:13,088 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:31:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-04-17 18:31:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 198. [2020-04-17 18:31:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:31:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 295 transitions. [2020-04-17 18:31:13,097 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 295 transitions. Word has length 29 [2020-04-17 18:31:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:13,098 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 295 transitions. [2020-04-17 18:31:13,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:31:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 295 transitions. [2020-04-17 18:31:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-17 18:31:13,100 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:13,100 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:13,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:13,304 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 6 times [2020-04-17 18:31:13,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:13,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026159730] [2020-04-17 18:31:13,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:13,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026159730] [2020-04-17 18:31:13,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106717348] [2020-04-17 18:31:13,474 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 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 [2020-04-17 18:31:13,572 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 18:31:13,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:13,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:31:13,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-17 18:31:13,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:13,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2020-04-17 18:31:13,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635843194] [2020-04-17 18:31:13,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:31:13,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:13,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:31:13,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:31:13,676 INFO L87 Difference]: Start difference. First operand 198 states and 295 transitions. Second operand 16 states. [2020-04-17 18:31:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:14,160 INFO L93 Difference]: Finished difference Result 433 states and 580 transitions. [2020-04-17 18:31:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:31:14,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-04-17 18:31:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:14,165 INFO L225 Difference]: With dead ends: 433 [2020-04-17 18:31:14,165 INFO L226 Difference]: Without dead ends: 433 [2020-04-17 18:31:14,166 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=689, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:31:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-04-17 18:31:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 233. [2020-04-17 18:31:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-04-17 18:31:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 335 transitions. [2020-04-17 18:31:14,175 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 335 transitions. Word has length 33 [2020-04-17 18:31:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:14,175 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 335 transitions. [2020-04-17 18:31:14,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:31:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 335 transitions. [2020-04-17 18:31:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-17 18:31:14,177 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:14,177 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:14,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:14,382 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash -989165647, now seen corresponding path program 7 times [2020-04-17 18:31:14,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:14,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824873484] [2020-04-17 18:31:14,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:14,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824873484] [2020-04-17 18:31:14,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825515899] [2020-04-17 18:31:14,540 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:31:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:14,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:31:14,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-17 18:31:14,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:14,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-04-17 18:31:14,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128007369] [2020-04-17 18:31:14,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:31:14,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:31:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:31:14,691 INFO L87 Difference]: Start difference. First operand 233 states and 335 transitions. Second operand 18 states. [2020-04-17 18:31:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:15,520 INFO L93 Difference]: Finished difference Result 541 states and 717 transitions. [2020-04-17 18:31:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 18:31:15,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-04-17 18:31:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:15,525 INFO L225 Difference]: With dead ends: 541 [2020-04-17 18:31:15,525 INFO L226 Difference]: Without dead ends: 541 [2020-04-17 18:31:15,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:31:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-04-17 18:31:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 337. [2020-04-17 18:31:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-04-17 18:31:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 485 transitions. [2020-04-17 18:31:15,538 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 485 transitions. Word has length 36 [2020-04-17 18:31:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:15,538 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 485 transitions. [2020-04-17 18:31:15,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:31:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 485 transitions. [2020-04-17 18:31:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-17 18:31:15,540 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:15,541 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:15,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:15,749 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash -480954575, now seen corresponding path program 8 times [2020-04-17 18:31:15,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:15,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529203065] [2020-04-17 18:31:15,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:15,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529203065] [2020-04-17 18:31:15,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570843393] [2020-04-17 18:31:15,923 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 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 [2020-04-17 18:31:16,004 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:16,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:16,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:31:16,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 18:31:16,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:16,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-04-17 18:31:16,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268759729] [2020-04-17 18:31:16,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:31:16,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:31:16,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:31:16,086 INFO L87 Difference]: Start difference. First operand 337 states and 485 transitions. Second operand 20 states. [2020-04-17 18:31:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:16,899 INFO L93 Difference]: Finished difference Result 523 states and 705 transitions. [2020-04-17 18:31:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 18:31:16,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-04-17 18:31:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:16,903 INFO L225 Difference]: With dead ends: 523 [2020-04-17 18:31:16,903 INFO L226 Difference]: Without dead ends: 523 [2020-04-17 18:31:16,904 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1550, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 18:31:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-04-17 18:31:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 369. [2020-04-17 18:31:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-04-17 18:31:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 529 transitions. [2020-04-17 18:31:16,915 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 529 transitions. Word has length 40 [2020-04-17 18:31:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:16,916 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 529 transitions. [2020-04-17 18:31:16,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:31:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 529 transitions. [2020-04-17 18:31:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-17 18:31:16,917 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:16,917 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:17,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:17,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 9 times [2020-04-17 18:31:17,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:17,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169286161] [2020-04-17 18:31:17,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:17,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169286161] [2020-04-17 18:31:17,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770235868] [2020-04-17 18:31:17,278 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:31:17,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:31:17,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:17,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:31:17,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-04-17 18:31:17,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:17,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-04-17 18:31:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929507072] [2020-04-17 18:31:17,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:31:17,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:31:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:31:17,440 INFO L87 Difference]: Start difference. First operand 369 states and 529 transitions. Second operand 20 states. [2020-04-17 18:31:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:18,250 INFO L93 Difference]: Finished difference Result 788 states and 1040 transitions. [2020-04-17 18:31:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 18:31:18,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-04-17 18:31:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:18,255 INFO L225 Difference]: With dead ends: 788 [2020-04-17 18:31:18,255 INFO L226 Difference]: Without dead ends: 788 [2020-04-17 18:31:18,256 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1590, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:31:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-04-17 18:31:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 406. [2020-04-17 18:31:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-04-17 18:31:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 568 transitions. [2020-04-17 18:31:18,269 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 568 transitions. Word has length 44 [2020-04-17 18:31:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:18,269 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 568 transitions. [2020-04-17 18:31:18,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:31:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 568 transitions. [2020-04-17 18:31:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 18:31:18,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:18,271 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:18,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:18,483 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:18,484 INFO L82 PathProgramCache]: Analyzing trace with hash -128002161, now seen corresponding path program 10 times [2020-04-17 18:31:18,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:18,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631738503] [2020-04-17 18:31:18,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:18,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631738503] [2020-04-17 18:31:18,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683982125] [2020-04-17 18:31:18,638 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:18,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:31:18,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:18,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:31:18,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 67 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-17 18:31:18,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:18,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-04-17 18:31:18,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268303669] [2020-04-17 18:31:18,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:31:18,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:31:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:31:18,849 INFO L87 Difference]: Start difference. First operand 406 states and 568 transitions. Second operand 23 states. [2020-04-17 18:31:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:20,314 INFO L93 Difference]: Finished difference Result 879 states and 1138 transitions. [2020-04-17 18:31:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-04-17 18:31:20,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-04-17 18:31:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:20,318 INFO L225 Difference]: With dead ends: 879 [2020-04-17 18:31:20,319 INFO L226 Difference]: Without dead ends: 879 [2020-04-17 18:31:20,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1224, Invalid=3198, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 18:31:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-04-17 18:31:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 552. [2020-04-17 18:31:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-04-17 18:31:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 773 transitions. [2020-04-17 18:31:20,337 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 773 transitions. Word has length 47 [2020-04-17 18:31:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:20,338 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 773 transitions. [2020-04-17 18:31:20,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:31:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 773 transitions. [2020-04-17 18:31:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-04-17 18:31:20,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:20,340 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:20,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:20,545 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:20,546 INFO L82 PathProgramCache]: Analyzing trace with hash 706226703, now seen corresponding path program 11 times [2020-04-17 18:31:20,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:20,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718217537] [2020-04-17 18:31:20,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:20,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718217537] [2020-04-17 18:31:20,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557387539] [2020-04-17 18:31:20,738 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:20,808 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 18:31:20,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:20,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:31:20,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-04-17 18:31:20,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:20,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2020-04-17 18:31:20,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154177402] [2020-04-17 18:31:20,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 18:31:20,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 18:31:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:31:20,941 INFO L87 Difference]: Start difference. First operand 552 states and 773 transitions. Second operand 25 states. [2020-04-17 18:31:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:22,362 INFO L93 Difference]: Finished difference Result 819 states and 1083 transitions. [2020-04-17 18:31:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-04-17 18:31:22,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-04-17 18:31:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:22,369 INFO L225 Difference]: With dead ends: 819 [2020-04-17 18:31:22,370 INFO L226 Difference]: Without dead ends: 819 [2020-04-17 18:31:22,372 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1324, Invalid=3368, Unknown=0, NotChecked=0, Total=4692 [2020-04-17 18:31:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-04-17 18:31:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 590. [2020-04-17 18:31:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-04-17 18:31:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 824 transitions. [2020-04-17 18:31:22,391 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 824 transitions. Word has length 51 [2020-04-17 18:31:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:22,393 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 824 transitions. [2020-04-17 18:31:22,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 18:31:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 824 transitions. [2020-04-17 18:31:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-17 18:31:22,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:22,397 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:22,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:22,602 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash 314386685, now seen corresponding path program 12 times [2020-04-17 18:31:22,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:22,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312521839] [2020-04-17 18:31:22,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:22,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312521839] [2020-04-17 18:31:22,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266778990] [2020-04-17 18:31:22,838 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 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 [2020-04-17 18:31:22,956 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 18:31:22,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:22,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:31:22,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-04-17 18:31:23,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:23,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2020-04-17 18:31:23,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366092631] [2020-04-17 18:31:23,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 18:31:23,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 18:31:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:31:23,071 INFO L87 Difference]: Start difference. First operand 590 states and 824 transitions. Second operand 24 states. [2020-04-17 18:31:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:24,621 INFO L93 Difference]: Finished difference Result 1259 states and 1655 transitions. [2020-04-17 18:31:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-04-17 18:31:24,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-04-17 18:31:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:24,628 INFO L225 Difference]: With dead ends: 1259 [2020-04-17 18:31:24,628 INFO L226 Difference]: Without dead ends: 1259 [2020-04-17 18:31:24,630 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1284, Invalid=3138, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 18:31:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2020-04-17 18:31:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 653. [2020-04-17 18:31:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2020-04-17 18:31:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 891 transitions. [2020-04-17 18:31:24,648 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 891 transitions. Word has length 55 [2020-04-17 18:31:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:24,648 INFO L479 AbstractCegarLoop]: Abstraction has 653 states and 891 transitions. [2020-04-17 18:31:24,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 18:31:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 891 transitions. [2020-04-17 18:31:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-04-17 18:31:24,650 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:24,650 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:24,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:24,854 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1476087879, now seen corresponding path program 13 times [2020-04-17 18:31:24,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:24,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469919370] [2020-04-17 18:31:24,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:25,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469919370] [2020-04-17 18:31:25,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653852474] [2020-04-17 18:31:25,090 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 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 [2020-04-17 18:31:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:25,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:31:25,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 121 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-04-17 18:31:25,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:25,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2020-04-17 18:31:25,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830862037] [2020-04-17 18:31:25,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-17 18:31:25,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-17 18:31:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:31:25,470 INFO L87 Difference]: Start difference. First operand 653 states and 891 transitions. Second operand 28 states. [2020-04-17 18:31:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:27,832 INFO L93 Difference]: Finished difference Result 1299 states and 1656 transitions. [2020-04-17 18:31:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-04-17 18:31:27,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-04-17 18:31:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:27,838 INFO L225 Difference]: With dead ends: 1299 [2020-04-17 18:31:27,839 INFO L226 Difference]: Without dead ends: 1299 [2020-04-17 18:31:27,841 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2387, Invalid=6169, Unknown=0, NotChecked=0, Total=8556 [2020-04-17 18:31:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2020-04-17 18:31:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 821. [2020-04-17 18:31:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-04-17 18:31:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1128 transitions. [2020-04-17 18:31:27,863 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1128 transitions. Word has length 58 [2020-04-17 18:31:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:27,864 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1128 transitions. [2020-04-17 18:31:27,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-17 18:31:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1128 transitions. [2020-04-17 18:31:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-04-17 18:31:27,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:27,866 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:28,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:28,070 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1165810489, now seen corresponding path program 14 times [2020-04-17 18:31:28,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:28,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459872785] [2020-04-17 18:31:28,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:28,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459872785] [2020-04-17 18:31:28,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931883463] [2020-04-17 18:31:28,315 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 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 [2020-04-17 18:31:28,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:28,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:28,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:31:28,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 16 proven. 153 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-04-17 18:31:28,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:28,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2020-04-17 18:31:28,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145283087] [2020-04-17 18:31:28,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-17 18:31:28,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-17 18:31:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:31:28,706 INFO L87 Difference]: Start difference. First operand 821 states and 1128 transitions. Second operand 30 states. [2020-04-17 18:31:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:30,872 INFO L93 Difference]: Finished difference Result 1185 states and 1546 transitions. [2020-04-17 18:31:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-04-17 18:31:30,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2020-04-17 18:31:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:30,878 INFO L225 Difference]: With dead ends: 1185 [2020-04-17 18:31:30,878 INFO L226 Difference]: Without dead ends: 1185 [2020-04-17 18:31:30,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2531, Invalid=6399, Unknown=0, NotChecked=0, Total=8930 [2020-04-17 18:31:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2020-04-17 18:31:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 865. [2020-04-17 18:31:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 865 states. [2020-04-17 18:31:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1186 transitions. [2020-04-17 18:31:30,900 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1186 transitions. Word has length 62 [2020-04-17 18:31:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:30,900 INFO L479 AbstractCegarLoop]: Abstraction has 865 states and 1186 transitions. [2020-04-17 18:31:30,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-17 18:31:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1186 transitions. [2020-04-17 18:31:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-17 18:31:30,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:30,903 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:31,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:31,107 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1214981237, now seen corresponding path program 15 times [2020-04-17 18:31:31,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:31,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986964048] [2020-04-17 18:31:31,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:31,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986964048] [2020-04-17 18:31:31,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909989670] [2020-04-17 18:31:31,380 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 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 [2020-04-17 18:31:31,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 18:31:31,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:31,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:31:31,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-04-17 18:31:31,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:31,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-04-17 18:31:31,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188655828] [2020-04-17 18:31:31,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-17 18:31:31,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-17 18:31:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:31:31,624 INFO L87 Difference]: Start difference. First operand 865 states and 1186 transitions. Second operand 28 states. [2020-04-17 18:31:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:33,526 INFO L93 Difference]: Finished difference Result 1844 states and 2418 transitions. [2020-04-17 18:31:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-04-17 18:31:33,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-04-17 18:31:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:33,534 INFO L225 Difference]: With dead ends: 1844 [2020-04-17 18:31:33,534 INFO L226 Difference]: Without dead ends: 1844 [2020-04-17 18:31:33,537 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2255, Invalid=5577, Unknown=0, NotChecked=0, Total=7832 [2020-04-17 18:31:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-04-17 18:31:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 945. [2020-04-17 18:31:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2020-04-17 18:31:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1269 transitions. [2020-04-17 18:31:33,561 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1269 transitions. Word has length 66 [2020-04-17 18:31:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:33,561 INFO L479 AbstractCegarLoop]: Abstraction has 945 states and 1269 transitions. [2020-04-17 18:31:33,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-17 18:31:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1269 transitions. [2020-04-17 18:31:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-04-17 18:31:33,564 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:33,564 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:33,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:33,769 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 939984263, now seen corresponding path program 16 times [2020-04-17 18:31:33,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:33,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746684087] [2020-04-17 18:31:33,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:34,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746684087] [2020-04-17 18:31:34,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926675078] [2020-04-17 18:31:34,074 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 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 [2020-04-17 18:31:34,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:31:34,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:34,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:31:34,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-04-17 18:31:34,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:34,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2020-04-17 18:31:34,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263241284] [2020-04-17 18:31:34,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-17 18:31:34,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-17 18:31:34,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:31:34,402 INFO L87 Difference]: Start difference. First operand 945 states and 1269 transitions. Second operand 30 states. [2020-04-17 18:31:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:36,683 INFO L93 Difference]: Finished difference Result 1986 states and 2545 transitions. [2020-04-17 18:31:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-04-17 18:31:36,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-04-17 18:31:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:36,692 INFO L225 Difference]: With dead ends: 1986 [2020-04-17 18:31:36,693 INFO L226 Difference]: Without dead ends: 1986 [2020-04-17 18:31:36,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3181, Invalid=7949, Unknown=0, NotChecked=0, Total=11130 [2020-04-17 18:31:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2020-04-17 18:31:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1108. [2020-04-17 18:31:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-04-17 18:31:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1459 transitions. [2020-04-17 18:31:36,722 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1459 transitions. Word has length 69 [2020-04-17 18:31:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:36,722 INFO L479 AbstractCegarLoop]: Abstraction has 1108 states and 1459 transitions. [2020-04-17 18:31:36,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-17 18:31:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1459 transitions. [2020-04-17 18:31:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-04-17 18:31:36,727 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:36,727 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:36,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:36,933 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:36,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1653945845, now seen corresponding path program 17 times [2020-04-17 18:31:36,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:36,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459195828] [2020-04-17 18:31:36,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:37,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459195828] [2020-04-17 18:31:37,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311524544] [2020-04-17 18:31:37,265 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 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 [2020-04-17 18:31:37,356 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-04-17 18:31:37,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:37,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:31:37,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 52 proven. 192 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-04-17 18:31:37,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:37,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2020-04-17 18:31:37,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003382583] [2020-04-17 18:31:37,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-17 18:31:37,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:37,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-17 18:31:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:31:37,587 INFO L87 Difference]: Start difference. First operand 1108 states and 1459 transitions. Second operand 34 states. [2020-04-17 18:31:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:41,703 INFO L93 Difference]: Finished difference Result 2296 states and 2854 transitions. [2020-04-17 18:31:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-04-17 18:31:41,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-04-17 18:31:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:41,711 INFO L225 Difference]: With dead ends: 2296 [2020-04-17 18:31:41,711 INFO L226 Difference]: Without dead ends: 2296 [2020-04-17 18:31:41,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5175, Invalid=13731, Unknown=0, NotChecked=0, Total=18906 [2020-04-17 18:31:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-04-17 18:31:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1348. [2020-04-17 18:31:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1348 states. [2020-04-17 18:31:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1799 transitions. [2020-04-17 18:31:41,754 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1799 transitions. Word has length 72 [2020-04-17 18:31:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:41,755 INFO L479 AbstractCegarLoop]: Abstraction has 1348 states and 1799 transitions. [2020-04-17 18:31:41,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-17 18:31:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1799 transitions. [2020-04-17 18:31:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-04-17 18:31:41,758 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:41,758 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:41,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:41,962 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 611615471, now seen corresponding path program 18 times [2020-04-17 18:31:41,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:41,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405515120] [2020-04-17 18:31:41,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:42,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405515120] [2020-04-17 18:31:42,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828586103] [2020-04-17 18:31:42,254 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 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 [2020-04-17 18:31:42,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-04-17 18:31:42,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:42,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:31:42,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 40 proven. 232 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-04-17 18:31:42,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:42,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2020-04-17 18:31:42,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535350328] [2020-04-17 18:31:42,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-04-17 18:31:42,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:42,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-17 18:31:42,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:31:42,706 INFO L87 Difference]: Start difference. First operand 1348 states and 1799 transitions. Second operand 36 states. [2020-04-17 18:31:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:46,855 INFO L93 Difference]: Finished difference Result 1931 states and 2464 transitions. [2020-04-17 18:31:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-04-17 18:31:46,856 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-04-17 18:31:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:46,862 INFO L225 Difference]: With dead ends: 1931 [2020-04-17 18:31:46,862 INFO L226 Difference]: Without dead ends: 1931 [2020-04-17 18:31:46,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5773 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5478, Invalid=13982, Unknown=0, NotChecked=0, Total=19460 [2020-04-17 18:31:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-04-17 18:31:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1339. [2020-04-17 18:31:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2020-04-17 18:31:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1791 transitions. [2020-04-17 18:31:46,888 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1791 transitions. Word has length 76 [2020-04-17 18:31:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:46,888 INFO L479 AbstractCegarLoop]: Abstraction has 1339 states and 1791 transitions. [2020-04-17 18:31:46,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-04-17 18:31:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1791 transitions. [2020-04-17 18:31:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-04-17 18:31:46,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:46,892 INFO L425 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:47,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:47,096 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1262805871, now seen corresponding path program 19 times [2020-04-17 18:31:47,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:47,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307956643] [2020-04-17 18:31:47,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:47,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307956643] [2020-04-17 18:31:47,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703211751] [2020-04-17 18:31:47,426 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 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 [2020-04-17 18:31:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:47,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:31:47,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 22 proven. 276 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-04-17 18:31:47,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:47,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2020-04-17 18:31:47,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979484952] [2020-04-17 18:31:47,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-04-17 18:31:47,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-17 18:31:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:31:47,803 INFO L87 Difference]: Start difference. First operand 1339 states and 1791 transitions. Second operand 38 states. [2020-04-17 18:31:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:51,922 INFO L93 Difference]: Finished difference Result 1915 states and 2449 transitions. [2020-04-17 18:31:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-04-17 18:31:51,922 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-04-17 18:31:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:51,930 INFO L225 Difference]: With dead ends: 1915 [2020-04-17 18:31:51,930 INFO L226 Difference]: Without dead ends: 1915 [2020-04-17 18:31:51,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5818 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5719, Invalid=14303, Unknown=0, NotChecked=0, Total=20022 [2020-04-17 18:31:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-04-17 18:31:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1395. [2020-04-17 18:31:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1395 states. [2020-04-17 18:31:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1863 transitions. [2020-04-17 18:31:51,955 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1863 transitions. Word has length 80 [2020-04-17 18:31:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:51,955 INFO L479 AbstractCegarLoop]: Abstraction has 1395 states and 1863 transitions. [2020-04-17 18:31:51,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-04-17 18:31:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1863 transitions. [2020-04-17 18:31:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-04-17 18:31:51,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:51,959 INFO L425 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:52,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:52,163 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1206924097, now seen corresponding path program 20 times [2020-04-17 18:31:52,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:52,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627201298] [2020-04-17 18:31:52,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:52,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627201298] [2020-04-17 18:31:52,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266568074] [2020-04-17 18:31:52,507 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 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 [2020-04-17 18:31:52,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:31:52,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:52,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:31:52,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 22 proven. 325 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-04-17 18:31:52,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:52,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2020-04-17 18:31:52,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334478668] [2020-04-17 18:31:52,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-04-17 18:31:52,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-17 18:31:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 18:31:52,883 INFO L87 Difference]: Start difference. First operand 1395 states and 1863 transitions. Second operand 40 states. [2020-04-17 18:31:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:31:58,118 INFO L93 Difference]: Finished difference Result 2667 states and 3429 transitions. [2020-04-17 18:31:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-04-17 18:31:58,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-04-17 18:31:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:31:58,127 INFO L225 Difference]: With dead ends: 2667 [2020-04-17 18:31:58,128 INFO L226 Difference]: Without dead ends: 2667 [2020-04-17 18:31:58,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7658 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6960, Invalid=18480, Unknown=0, NotChecked=0, Total=25440 [2020-04-17 18:31:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2020-04-17 18:31:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 1316. [2020-04-17 18:31:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1316 states. [2020-04-17 18:31:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1800 transitions. [2020-04-17 18:31:58,149 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1800 transitions. Word has length 84 [2020-04-17 18:31:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:31:58,149 INFO L479 AbstractCegarLoop]: Abstraction has 1316 states and 1800 transitions. [2020-04-17 18:31:58,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-04-17 18:31:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1800 transitions. [2020-04-17 18:31:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-04-17 18:31:58,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:31:58,153 INFO L425 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:31:58,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:31:58,358 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:31:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:31:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1542146579, now seen corresponding path program 21 times [2020-04-17 18:31:58,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:31:58,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744958646] [2020-04-17 18:31:58,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:31:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:31:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:31:58,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744958646] [2020-04-17 18:31:58,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338192278] [2020-04-17 18:31:58,737 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 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 [2020-04-17 18:31:58,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 18:31:58,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:31:58,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:31:58,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:31:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-04-17 18:31:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:31:58,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 33 [2020-04-17 18:31:58,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000818573] [2020-04-17 18:31:58,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-17 18:31:58,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:31:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-17 18:31:58,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:31:58,982 INFO L87 Difference]: Start difference. First operand 1316 states and 1800 transitions. Second operand 33 states. [2020-04-17 18:32:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:02,304 INFO L93 Difference]: Finished difference Result 3043 states and 4025 transitions. [2020-04-17 18:32:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-04-17 18:32:02,305 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 88 [2020-04-17 18:32:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:02,316 INFO L225 Difference]: With dead ends: 3043 [2020-04-17 18:32:02,317 INFO L226 Difference]: Without dead ends: 3043 [2020-04-17 18:32:02,318 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7684 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5674, Invalid=13508, Unknown=0, NotChecked=0, Total=19182 [2020-04-17 18:32:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2020-04-17 18:32:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 1443. [2020-04-17 18:32:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-04-17 18:32:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1932 transitions. [2020-04-17 18:32:02,340 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1932 transitions. Word has length 88 [2020-04-17 18:32:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:02,340 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 1932 transitions. [2020-04-17 18:32:02,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-17 18:32:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1932 transitions. [2020-04-17 18:32:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-04-17 18:32:02,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:02,344 INFO L425 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:02,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:02,554 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1535852673, now seen corresponding path program 22 times [2020-04-17 18:32:02,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:02,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439283937] [2020-04-17 18:32:02,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:02,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439283937] [2020-04-17 18:32:02,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851233008] [2020-04-17 18:32:02,897 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 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 [2020-04-17 18:32:03,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:32:03,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:03,189 INFO L264 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:32:03,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 46 proven. 379 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-04-17 18:32:03,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:03,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 43 [2020-04-17 18:32:03,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091614201] [2020-04-17 18:32:03,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-17 18:32:03,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-17 18:32:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 18:32:03,492 INFO L87 Difference]: Start difference. First operand 1443 states and 1932 transitions. Second operand 43 states. [2020-04-17 18:32:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:10,843 INFO L93 Difference]: Finished difference Result 2856 states and 3604 transitions. [2020-04-17 18:32:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2020-04-17 18:32:10,843 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-04-17 18:32:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:10,855 INFO L225 Difference]: With dead ends: 2856 [2020-04-17 18:32:10,855 INFO L226 Difference]: Without dead ends: 2856 [2020-04-17 18:32:10,857 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12550 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9746, Invalid=29260, Unknown=0, NotChecked=0, Total=39006 [2020-04-17 18:32:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2020-04-17 18:32:10,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 1516. [2020-04-17 18:32:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2020-04-17 18:32:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2078 transitions. [2020-04-17 18:32:10,879 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2078 transitions. Word has length 91 [2020-04-17 18:32:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:10,879 INFO L479 AbstractCegarLoop]: Abstraction has 1516 states and 2078 transitions. [2020-04-17 18:32:10,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-17 18:32:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2078 transitions. [2020-04-17 18:32:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-04-17 18:32:10,882 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:10,882 INFO L425 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:11,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:11,087 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1676207617, now seen corresponding path program 23 times [2020-04-17 18:32:11,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:11,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737457641] [2020-04-17 18:32:11,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:11,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737457641] [2020-04-17 18:32:11,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557443777] [2020-04-17 18:32:11,490 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 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 [2020-04-17 18:32:11,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-04-17 18:32:11,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:11,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:32:11,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 25 proven. 435 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-04-17 18:32:11,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:11,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18] total 45 [2020-04-17 18:32:11,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706711131] [2020-04-17 18:32:11,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-17 18:32:11,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-17 18:32:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1554, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 18:32:11,980 INFO L87 Difference]: Start difference. First operand 1516 states and 2078 transitions. Second operand 45 states. [2020-04-17 18:32:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:19,495 INFO L93 Difference]: Finished difference Result 2867 states and 3675 transitions. [2020-04-17 18:32:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-04-17 18:32:19,496 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-04-17 18:32:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:19,502 INFO L225 Difference]: With dead ends: 2867 [2020-04-17 18:32:19,503 INFO L226 Difference]: Without dead ends: 2867 [2020-04-17 18:32:19,506 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13236 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9998, Invalid=31414, Unknown=0, NotChecked=0, Total=41412 [2020-04-17 18:32:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2020-04-17 18:32:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1533. [2020-04-17 18:32:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-04-17 18:32:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2104 transitions. [2020-04-17 18:32:19,529 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2104 transitions. Word has length 95 [2020-04-17 18:32:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:19,529 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2104 transitions. [2020-04-17 18:32:19,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-17 18:32:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2104 transitions. [2020-04-17 18:32:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-04-17 18:32:19,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:19,532 INFO L425 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:19,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:19,733 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1630268397, now seen corresponding path program 24 times [2020-04-17 18:32:19,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:19,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596918982] [2020-04-17 18:32:19,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:20,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596918982] [2020-04-17 18:32:20,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845247295] [2020-04-17 18:32:20,175 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 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 [2020-04-17 18:32:20,402 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-04-17 18:32:20,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:20,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:32:20,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-04-17 18:32:20,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:20,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 34 [2020-04-17 18:32:20,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716535885] [2020-04-17 18:32:20,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-17 18:32:20,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-17 18:32:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:32:20,530 INFO L87 Difference]: Start difference. First operand 1533 states and 2104 transitions. Second operand 34 states. [2020-04-17 18:32:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:24,606 INFO L93 Difference]: Finished difference Result 3727 states and 4949 transitions. [2020-04-17 18:32:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-04-17 18:32:24,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-04-17 18:32:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:24,614 INFO L225 Difference]: With dead ends: 3727 [2020-04-17 18:32:24,614 INFO L226 Difference]: Without dead ends: 3727 [2020-04-17 18:32:24,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8395, Invalid=19327, Unknown=0, NotChecked=0, Total=27722 [2020-04-17 18:32:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2020-04-17 18:32:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 1686. [2020-04-17 18:32:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1686 states. [2020-04-17 18:32:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2264 transitions. [2020-04-17 18:32:24,649 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2264 transitions. Word has length 99 [2020-04-17 18:32:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 1686 states and 2264 transitions. [2020-04-17 18:32:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-17 18:32:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2264 transitions. [2020-04-17 18:32:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-04-17 18:32:24,653 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:24,653 INFO L425 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:24,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:24,858 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1490838583, now seen corresponding path program 25 times [2020-04-17 18:32:24,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:24,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488681517] [2020-04-17 18:32:24,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:25,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488681517] [2020-04-17 18:32:25,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352647061] [2020-04-17 18:32:25,444 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 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 [2020-04-17 18:32:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:25,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:32:25,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 52 proven. 497 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-04-17 18:32:26,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:26,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19] total 48 [2020-04-17 18:32:26,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869161339] [2020-04-17 18:32:26,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-04-17 18:32:26,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-04-17 18:32:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 18:32:26,208 INFO L87 Difference]: Start difference. First operand 1686 states and 2264 transitions. Second operand 48 states. [2020-04-17 18:32:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:36,972 INFO L93 Difference]: Finished difference Result 3304 states and 4165 transitions. [2020-04-17 18:32:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2020-04-17 18:32:36,973 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-04-17 18:32:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:36,978 INFO L225 Difference]: With dead ends: 3304 [2020-04-17 18:32:36,978 INFO L226 Difference]: Without dead ends: 3304 [2020-04-17 18:32:36,980 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20888 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=14309, Invalid=47443, Unknown=0, NotChecked=0, Total=61752 [2020-04-17 18:32:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2020-04-17 18:32:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 1739. [2020-04-17 18:32:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1739 states. [2020-04-17 18:32:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2393 transitions. [2020-04-17 18:32:37,010 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2393 transitions. Word has length 102 [2020-04-17 18:32:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:37,010 INFO L479 AbstractCegarLoop]: Abstraction has 1739 states and 2393 transitions. [2020-04-17 18:32:37,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-04-17 18:32:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2393 transitions. [2020-04-17 18:32:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-04-17 18:32:37,014 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:37,014 INFO L425 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:37,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:37,218 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1100529481, now seen corresponding path program 26 times [2020-04-17 18:32:37,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:37,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720181704] [2020-04-17 18:32:37,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:37,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720181704] [2020-04-17 18:32:37,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480802930] [2020-04-17 18:32:37,853 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 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 [2020-04-17 18:32:38,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:32:38,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:38,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:32:38,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 28 proven. 561 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-04-17 18:32:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:38,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 20] total 50 [2020-04-17 18:32:38,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120782106] [2020-04-17 18:32:38,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-04-17 18:32:38,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-04-17 18:32:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1924, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 18:32:38,672 INFO L87 Difference]: Start difference. First operand 1739 states and 2393 transitions. Second operand 50 states. [2020-04-17 18:32:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:50,299 INFO L93 Difference]: Finished difference Result 3296 states and 4221 transitions. [2020-04-17 18:32:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2020-04-17 18:32:50,300 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-04-17 18:32:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:50,305 INFO L225 Difference]: With dead ends: 3296 [2020-04-17 18:32:50,306 INFO L226 Difference]: Without dead ends: 3296 [2020-04-17 18:32:50,308 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23016 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=15656, Invalid=52204, Unknown=0, NotChecked=0, Total=67860 [2020-04-17 18:32:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2020-04-17 18:32:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1756. [2020-04-17 18:32:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1756 states. [2020-04-17 18:32:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2419 transitions. [2020-04-17 18:32:50,335 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2419 transitions. Word has length 106 [2020-04-17 18:32:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:50,336 INFO L479 AbstractCegarLoop]: Abstraction has 1756 states and 2419 transitions. [2020-04-17 18:32:50,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-04-17 18:32:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2419 transitions. [2020-04-17 18:32:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-04-17 18:32:50,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:50,339 INFO L425 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:50,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:50,543 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:50,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1999572123, now seen corresponding path program 27 times [2020-04-17 18:32:50,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:50,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039913109] [2020-04-17 18:32:50,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:51,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039913109] [2020-04-17 18:32:51,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871404781] [2020-04-17 18:32:51,064 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 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 [2020-04-17 18:32:51,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 18:32:51,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:51,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:32:51,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-04-17 18:32:51,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:51,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 35 [2020-04-17 18:32:51,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54380827] [2020-04-17 18:32:51,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-04-17 18:32:51,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-17 18:32:51,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:32:51,283 INFO L87 Difference]: Start difference. First operand 1756 states and 2419 transitions. Second operand 35 states. [2020-04-17 18:32:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:32:56,530 INFO L93 Difference]: Finished difference Result 4529 states and 6017 transitions. [2020-04-17 18:32:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2020-04-17 18:32:56,530 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2020-04-17 18:32:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:32:56,537 INFO L225 Difference]: With dead ends: 4529 [2020-04-17 18:32:56,538 INFO L226 Difference]: Without dead ends: 4529 [2020-04-17 18:32:56,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18366 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12018, Invalid=26988, Unknown=0, NotChecked=0, Total=39006 [2020-04-17 18:32:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2020-04-17 18:32:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 1935. [2020-04-17 18:32:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1935 states. [2020-04-17 18:32:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2607 transitions. [2020-04-17 18:32:56,572 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2607 transitions. Word has length 110 [2020-04-17 18:32:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:32:56,572 INFO L479 AbstractCegarLoop]: Abstraction has 1935 states and 2607 transitions. [2020-04-17 18:32:56,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-04-17 18:32:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2607 transitions. [2020-04-17 18:32:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-04-17 18:32:56,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:32:56,576 INFO L425 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:32:56,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:32:56,781 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:32:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:32:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1958836873, now seen corresponding path program 28 times [2020-04-17 18:32:56,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:32:56,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004922925] [2020-04-17 18:32:56,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:32:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:32:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:32:57,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004922925] [2020-04-17 18:32:57,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123437494] [2020-04-17 18:32:57,437 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 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 [2020-04-17 18:32:58,438 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:32:58,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:32:58,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:32:58,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:32:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 58 proven. 631 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-04-17 18:32:58,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:32:58,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21] total 53 [2020-04-17 18:32:58,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453785694] [2020-04-17 18:32:58,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-04-17 18:32:58,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:32:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-04-17 18:32:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=2159, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 18:32:58,904 INFO L87 Difference]: Start difference. First operand 1935 states and 2607 transitions. Second operand 53 states. [2020-04-17 18:33:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:14,739 INFO L93 Difference]: Finished difference Result 3809 states and 4796 transitions. [2020-04-17 18:33:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2020-04-17 18:33:14,740 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-04-17 18:33:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:14,743 INFO L225 Difference]: With dead ends: 3809 [2020-04-17 18:33:14,744 INFO L226 Difference]: Without dead ends: 3809 [2020-04-17 18:33:14,747 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34880 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=22293, Invalid=75363, Unknown=0, NotChecked=0, Total=97656 [2020-04-17 18:33:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2020-04-17 18:33:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 1964. [2020-04-17 18:33:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1964 states. [2020-04-17 18:33:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2714 transitions. [2020-04-17 18:33:14,774 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2714 transitions. Word has length 113 [2020-04-17 18:33:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:14,774 INFO L479 AbstractCegarLoop]: Abstraction has 1964 states and 2714 transitions. [2020-04-17 18:33:14,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-04-17 18:33:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2714 transitions. [2020-04-17 18:33:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-04-17 18:33:14,777 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:14,778 INFO L425 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:14,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:14,983 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -931896329, now seen corresponding path program 29 times [2020-04-17 18:33:14,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:14,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968932272] [2020-04-17 18:33:14,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:33:15,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968932272] [2020-04-17 18:33:15,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61254158] [2020-04-17 18:33:15,690 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 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 [2020-04-17 18:33:15,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-04-17 18:33:15,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:15,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:33:15,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 31 proven. 703 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-04-17 18:33:16,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:16,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22] total 55 [2020-04-17 18:33:16,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32344928] [2020-04-17 18:33:16,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-04-17 18:33:16,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-17 18:33:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=2335, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 18:33:16,586 INFO L87 Difference]: Start difference. First operand 1964 states and 2714 transitions. Second operand 55 states. [2020-04-17 18:33:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:34,104 INFO L93 Difference]: Finished difference Result 3783 states and 4835 transitions. [2020-04-17 18:33:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2020-04-17 18:33:34,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 117 [2020-04-17 18:33:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:34,106 INFO L225 Difference]: With dead ends: 3783 [2020-04-17 18:33:34,107 INFO L226 Difference]: Without dead ends: 3783 [2020-04-17 18:33:34,110 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39202 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=25317, Invalid=83913, Unknown=0, NotChecked=0, Total=109230 [2020-04-17 18:33:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2020-04-17 18:33:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 1998. [2020-04-17 18:33:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1998 states. [2020-04-17 18:33:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 2756 transitions. [2020-04-17 18:33:34,137 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 2756 transitions. Word has length 117 [2020-04-17 18:33:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:34,138 INFO L479 AbstractCegarLoop]: Abstraction has 1998 states and 2756 transitions. [2020-04-17 18:33:34,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-04-17 18:33:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 2756 transitions. [2020-04-17 18:33:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-04-17 18:33:34,141 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:34,142 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:34,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:34,346 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 30 times [2020-04-17 18:33:34,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:34,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836885291] [2020-04-17 18:33:34,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:34,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836885291] [2020-04-17 18:33:34,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465094431] [2020-04-17 18:33:34,520 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 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 [2020-04-17 18:33:34,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-04-17 18:33:34,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:34,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:33:34,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:34,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:34,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 18:33:34,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910369959] [2020-04-17 18:33:34,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:33:34,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:33:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:33:34,927 INFO L87 Difference]: Start difference. First operand 1998 states and 2756 transitions. Second operand 15 states. [2020-04-17 18:33:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:34,987 INFO L93 Difference]: Finished difference Result 2151 states and 2898 transitions. [2020-04-17 18:33:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:33:34,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-04-17 18:33:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:34,990 INFO L225 Difference]: With dead ends: 2151 [2020-04-17 18:33:34,990 INFO L226 Difference]: Without dead ends: 2151 [2020-04-17 18:33:34,990 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:33:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2020-04-17 18:33:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2098. [2020-04-17 18:33:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2098 states. [2020-04-17 18:33:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2840 transitions. [2020-04-17 18:33:35,007 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2840 transitions. Word has length 121 [2020-04-17 18:33:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:35,008 INFO L479 AbstractCegarLoop]: Abstraction has 2098 states and 2840 transitions. [2020-04-17 18:33:35,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:33:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2840 transitions. [2020-04-17 18:33:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-04-17 18:33:35,011 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:35,011 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:35,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:35,212 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:35,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 31 times [2020-04-17 18:33:35,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:35,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604490686] [2020-04-17 18:33:35,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:35,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604490686] [2020-04-17 18:33:35,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50932307] [2020-04-17 18:33:35,374 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 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 [2020-04-17 18:33:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:35,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:33:35,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:35,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:35,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 18:33:35,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454661277] [2020-04-17 18:33:35,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:33:35,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:33:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:33:35,526 INFO L87 Difference]: Start difference. First operand 2098 states and 2840 transitions. Second operand 16 states. [2020-04-17 18:33:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:35,595 INFO L93 Difference]: Finished difference Result 2273 states and 3010 transitions. [2020-04-17 18:33:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:33:35,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-04-17 18:33:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:35,597 INFO L225 Difference]: With dead ends: 2273 [2020-04-17 18:33:35,597 INFO L226 Difference]: Without dead ends: 2273 [2020-04-17 18:33:35,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:33:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2020-04-17 18:33:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2214. [2020-04-17 18:33:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2214 states. [2020-04-17 18:33:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 2945 transitions. [2020-04-17 18:33:35,613 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 2945 transitions. Word has length 124 [2020-04-17 18:33:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:35,613 INFO L479 AbstractCegarLoop]: Abstraction has 2214 states and 2945 transitions. [2020-04-17 18:33:35,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:33:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 2945 transitions. [2020-04-17 18:33:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-04-17 18:33:35,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:35,616 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:35,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:35,817 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 32 times [2020-04-17 18:33:35,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:35,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630736090] [2020-04-17 18:33:35,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:36,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630736090] [2020-04-17 18:33:36,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156649620] [2020-04-17 18:33:36,014 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 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 [2020-04-17 18:33:36,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:33:36,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:36,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:33:36,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:36,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:36,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 18:33:36,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155891592] [2020-04-17 18:33:36,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:33:36,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:36,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:33:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:33:36,185 INFO L87 Difference]: Start difference. First operand 2214 states and 2945 transitions. Second operand 17 states. [2020-04-17 18:33:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:36,253 INFO L93 Difference]: Finished difference Result 2389 states and 3119 transitions. [2020-04-17 18:33:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:33:36,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-04-17 18:33:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:36,256 INFO L225 Difference]: With dead ends: 2389 [2020-04-17 18:33:36,256 INFO L226 Difference]: Without dead ends: 2389 [2020-04-17 18:33:36,256 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:33:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2020-04-17 18:33:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2324. [2020-04-17 18:33:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2020-04-17 18:33:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3047 transitions. [2020-04-17 18:33:36,277 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3047 transitions. Word has length 127 [2020-04-17 18:33:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:36,277 INFO L479 AbstractCegarLoop]: Abstraction has 2324 states and 3047 transitions. [2020-04-17 18:33:36,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:33:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3047 transitions. [2020-04-17 18:33:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-04-17 18:33:36,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:36,280 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:36,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:36,481 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 33 times [2020-04-17 18:33:36,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:36,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439574810] [2020-04-17 18:33:36,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:36,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439574810] [2020-04-17 18:33:36,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861068533] [2020-04-17 18:33:36,720 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 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 [2020-04-17 18:33:36,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-04-17 18:33:36,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:36,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 18:33:36,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:37,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:37,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 18:33:37,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235421869] [2020-04-17 18:33:37,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:33:37,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:33:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:33:37,026 INFO L87 Difference]: Start difference. First operand 2324 states and 3047 transitions. Second operand 18 states. [2020-04-17 18:33:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:37,109 INFO L93 Difference]: Finished difference Result 2499 states and 3225 transitions. [2020-04-17 18:33:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:33:37,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-04-17 18:33:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:37,112 INFO L225 Difference]: With dead ends: 2499 [2020-04-17 18:33:37,112 INFO L226 Difference]: Without dead ends: 2499 [2020-04-17 18:33:37,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:33:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-04-17 18:33:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2428. [2020-04-17 18:33:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2020-04-17 18:33:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3146 transitions. [2020-04-17 18:33:37,138 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3146 transitions. Word has length 130 [2020-04-17 18:33:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:37,139 INFO L479 AbstractCegarLoop]: Abstraction has 2428 states and 3146 transitions. [2020-04-17 18:33:37,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:33:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3146 transitions. [2020-04-17 18:33:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-04-17 18:33:37,143 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:37,144 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:37,350 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 34 times [2020-04-17 18:33:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:37,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970584996] [2020-04-17 18:33:37,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:37,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970584996] [2020-04-17 18:33:37,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638926499] [2020-04-17 18:33:37,721 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 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 [2020-04-17 18:33:39,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:33:39,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:39,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:33:39,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:39,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:39,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 18:33:39,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247206049] [2020-04-17 18:33:39,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 18:33:39,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 18:33:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:33:39,200 INFO L87 Difference]: Start difference. First operand 2428 states and 3146 transitions. Second operand 19 states. [2020-04-17 18:33:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:39,268 INFO L93 Difference]: Finished difference Result 2603 states and 3328 transitions. [2020-04-17 18:33:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:33:39,268 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-04-17 18:33:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:39,271 INFO L225 Difference]: With dead ends: 2603 [2020-04-17 18:33:39,271 INFO L226 Difference]: Without dead ends: 2603 [2020-04-17 18:33:39,271 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:33:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2020-04-17 18:33:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2526. [2020-04-17 18:33:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2526 states. [2020-04-17 18:33:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 3242 transitions. [2020-04-17 18:33:39,290 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 3242 transitions. Word has length 133 [2020-04-17 18:33:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:39,290 INFO L479 AbstractCegarLoop]: Abstraction has 2526 states and 3242 transitions. [2020-04-17 18:33:39,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 18:33:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 3242 transitions. [2020-04-17 18:33:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-04-17 18:33:39,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:39,294 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:39,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:39,494 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 35 times [2020-04-17 18:33:39,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:39,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113151126] [2020-04-17 18:33:39,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:39,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113151126] [2020-04-17 18:33:39,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188589129] [2020-04-17 18:33:39,725 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 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 [2020-04-17 18:33:39,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-04-17 18:33:39,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:39,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 18:33:39,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:39,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:39,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 18:33:39,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68594533] [2020-04-17 18:33:39,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:33:39,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:33:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:33:39,987 INFO L87 Difference]: Start difference. First operand 2526 states and 3242 transitions. Second operand 20 states. [2020-04-17 18:33:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:40,073 INFO L93 Difference]: Finished difference Result 2701 states and 3428 transitions. [2020-04-17 18:33:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:33:40,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-04-17 18:33:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:40,075 INFO L225 Difference]: With dead ends: 2701 [2020-04-17 18:33:40,075 INFO L226 Difference]: Without dead ends: 2701 [2020-04-17 18:33:40,076 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:33:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2020-04-17 18:33:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2618. [2020-04-17 18:33:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2618 states. [2020-04-17 18:33:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3335 transitions. [2020-04-17 18:33:40,094 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3335 transitions. Word has length 136 [2020-04-17 18:33:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:40,094 INFO L479 AbstractCegarLoop]: Abstraction has 2618 states and 3335 transitions. [2020-04-17 18:33:40,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:33:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3335 transitions. [2020-04-17 18:33:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-04-17 18:33:40,099 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:40,099 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:40,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:40,304 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 36 times [2020-04-17 18:33:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:40,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700994335] [2020-04-17 18:33:40,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:40,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700994335] [2020-04-17 18:33:40,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991406474] [2020-04-17 18:33:40,548 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:41,018 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-04-17 18:33:41,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:41,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 18:33:41,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:41,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:41,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 18:33:41,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941443256] [2020-04-17 18:33:41,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 18:33:41,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 18:33:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:33:41,059 INFO L87 Difference]: Start difference. First operand 2618 states and 3335 transitions. Second operand 21 states. [2020-04-17 18:33:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:41,161 INFO L93 Difference]: Finished difference Result 2793 states and 3525 transitions. [2020-04-17 18:33:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:33:41,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-04-17 18:33:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:41,163 INFO L225 Difference]: With dead ends: 2793 [2020-04-17 18:33:41,164 INFO L226 Difference]: Without dead ends: 2793 [2020-04-17 18:33:41,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:33:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2020-04-17 18:33:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2704. [2020-04-17 18:33:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-04-17 18:33:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3425 transitions. [2020-04-17 18:33:41,183 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3425 transitions. Word has length 139 [2020-04-17 18:33:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:41,184 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3425 transitions. [2020-04-17 18:33:41,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 18:33:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3425 transitions. [2020-04-17 18:33:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-04-17 18:33:41,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:41,208 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:41,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:41,409 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 37 times [2020-04-17 18:33:41,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:41,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438295288] [2020-04-17 18:33:41,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:41,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438295288] [2020-04-17 18:33:41,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374556190] [2020-04-17 18:33:41,688 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:41,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 18:33:41,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:41,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:41,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 18:33:41,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011364168] [2020-04-17 18:33:41,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:33:41,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:33:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:33:41,846 INFO L87 Difference]: Start difference. First operand 2704 states and 3425 transitions. Second operand 22 states. [2020-04-17 18:33:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:41,932 INFO L93 Difference]: Finished difference Result 2879 states and 3619 transitions. [2020-04-17 18:33:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:33:41,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-04-17 18:33:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:41,935 INFO L225 Difference]: With dead ends: 2879 [2020-04-17 18:33:41,935 INFO L226 Difference]: Without dead ends: 2879 [2020-04-17 18:33:41,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:33:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2020-04-17 18:33:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2784. [2020-04-17 18:33:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-04-17 18:33:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3512 transitions. [2020-04-17 18:33:41,955 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3512 transitions. Word has length 142 [2020-04-17 18:33:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:41,956 INFO L479 AbstractCegarLoop]: Abstraction has 2784 states and 3512 transitions. [2020-04-17 18:33:41,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:33:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3512 transitions. [2020-04-17 18:33:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-04-17 18:33:41,961 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:41,961 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:42,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:42,165 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 38 times [2020-04-17 18:33:42,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:42,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931860201] [2020-04-17 18:33:42,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:42,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931860201] [2020-04-17 18:33:42,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274852143] [2020-04-17 18:33:42,521 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 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 [2020-04-17 18:33:42,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:33:42,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:42,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 18:33:42,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-17 18:33:42,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:42,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 18:33:42,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358133766] [2020-04-17 18:33:42,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 18:33:42,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 18:33:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:33:42,681 INFO L87 Difference]: Start difference. First operand 2784 states and 3512 transitions. Second operand 23 states. [2020-04-17 18:33:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:33:42,783 INFO L93 Difference]: Finished difference Result 2913 states and 3660 transitions. [2020-04-17 18:33:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:33:42,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-04-17 18:33:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:33:42,785 INFO L225 Difference]: With dead ends: 2913 [2020-04-17 18:33:42,786 INFO L226 Difference]: Without dead ends: 2913 [2020-04-17 18:33:42,786 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:33:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2020-04-17 18:33:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2833. [2020-04-17 18:33:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-04-17 18:33:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-04-17 18:33:42,805 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-04-17 18:33:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:33:42,805 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-04-17 18:33:42,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 18:33:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-04-17 18:33:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-04-17 18:33:42,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:33:42,808 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:33:43,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:33:43,009 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:33:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:33:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 39 times [2020-04-17 18:33:43,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:33:43,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505565153] [2020-04-17 18:33:43,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:33:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:33:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:33:45,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505565153] [2020-04-17 18:33:45,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902775044] [2020-04-17 18:33:45,403 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 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 [2020-04-17 18:33:45,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-04-17 18:33:45,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:33:45,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-04-17 18:33:45,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:33:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:33:46,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:33:46,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-04-17 18:33:46,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654702056] [2020-04-17 18:33:46,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-04-17 18:33:46,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:33:46,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-17 18:33:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 18:33:46,065 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-04-17 18:35:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:35:00,954 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-04-17 18:35:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-04-17 18:35:00,955 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-04-17 18:35:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:35:00,991 INFO L225 Difference]: With dead ends: 32926 [2020-04-17 18:35:00,992 INFO L226 Difference]: Without dead ends: 32924 [2020-04-17 18:35:01,011 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-04-17 18:35:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-04-17 18:35:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-04-17 18:35:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-04-17 18:35:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-04-17 18:35:01,195 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-04-17 18:35:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:35:01,195 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-04-17 18:35:01,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-04-17 18:35:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-04-17 18:35:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-04-17 18:35:01,200 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:35:01,201 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:35:01,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:35:01,406 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:35:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:35:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 40 times [2020-04-17 18:35:01,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:35:01,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238236492] [2020-04-17 18:35:01,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:35:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:35:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:35:03,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238236492] [2020-04-17 18:35:03,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983840025] [2020-04-17 18:35:03,663 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:35:05,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:35:05,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:35:05,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-04-17 18:35:05,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:35:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:35:05,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:35:05,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-04-17 18:35:05,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078697291] [2020-04-17 18:35:05,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-04-17 18:35:05,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:35:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-17 18:35:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 18:35:05,658 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. Received shutdown request... [2020-04-17 18:35:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:35:06,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:35:06,046 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:35:06,051 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:35:06,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:35:06 BasicIcfg [2020-04-17 18:35:06,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:35:06,053 INFO L168 Benchmark]: Toolchain (without parser) took 242479.06 ms. Allocated memory was 137.9 MB in the beginning and 872.9 MB in the end (delta: 735.1 MB). Free memory was 99.7 MB in the beginning and 153.8 MB in the end (delta: -54.2 MB). Peak memory consumption was 680.9 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,053 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1092.49 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 97.8 MB in the beginning and 105.4 MB in the end (delta: -7.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.61 ms. Allocated memory is still 201.3 MB. Free memory was 105.4 MB in the beginning and 102.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,054 INFO L168 Benchmark]: Boogie Preprocessor took 64.01 ms. Allocated memory is still 201.3 MB. Free memory was 102.6 MB in the beginning and 101.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,055 INFO L168 Benchmark]: RCFGBuilder took 486.59 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 100.5 MB in the beginning and 193.1 MB in the end (delta: -92.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,055 INFO L168 Benchmark]: TraceAbstraction took 240699.97 ms. Allocated memory was 233.3 MB in the beginning and 872.9 MB in the end (delta: 639.6 MB). Free memory was 193.1 MB in the beginning and 153.8 MB in the end (delta: 39.2 MB). Peak memory consumption was 678.8 MB. Max. memory is 7.1 GB. [2020-04-17 18:35:06,057 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1092.49 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 97.8 MB in the beginning and 105.4 MB in the end (delta: -7.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 109.61 ms. Allocated memory is still 201.3 MB. Free memory was 105.4 MB in the beginning and 102.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.01 ms. Allocated memory is still 201.3 MB. Free memory was 102.6 MB in the beginning and 101.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.59 ms. Allocated memory was 201.3 MB in the beginning and 233.3 MB in the end (delta: 32.0 MB). Free memory was 100.5 MB in the beginning and 193.1 MB in the end (delta: -92.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240699.97 ms. Allocated memory was 233.3 MB in the beginning and 872.9 MB in the end (delta: 639.6 MB). Free memory was 193.1 MB in the beginning and 153.8 MB in the end (delta: 39.2 MB). Peak memory consumption was 678.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.2s, 78 ProgramPointsBefore, 19 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 323 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 5 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 70 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2967states) and FLOYD_HOARE automaton (currently 4 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (8 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 240.5s, OverallIterations: 42, TraceHistogramMax: 20, AutomataDifference: 194.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 3057 SDtfs, 28503 SDslu, 147701 SDs, 0 SdLazy, 92385 SolverSat, 8025 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9443 GetRequests, 5163 SyntacticMatches, 2 SemanticMatches, 4278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386384 ImplicationChecksByTransitivity, 129.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2967occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 41 MinimizatonAttempts, 54683 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 6805 NumberOfCodeBlocks, 6572 NumberOfCodeBlocksAsserted, 338 NumberOfCheckSat, 6723 ConstructedInterpolants, 0 QuantifiedInterpolants, 2570699 SizeOfPredicates, 119 NumberOfNonLiveVariables, 12915 ConjunctsInSsa, 781 ConjunctsInUnsatCore, 82 InterpolantComputations, 3 PerfectInterpolantSequences, 17614/43421 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 could not prove your program: Timeout Completed graceful shutdown