/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 01:19:04,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 01:19:04,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 01:19:04,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 01:19:04,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 01:19:04,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 01:19:04,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 01:19:04,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 01:19:04,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 01:19:04,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 01:19:04,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 01:19:04,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 01:19:04,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 01:19:04,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 01:19:04,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 01:19:04,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 01:19:04,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 01:19:04,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 01:19:04,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 01:19:04,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 01:19:04,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 01:19:04,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 01:19:04,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 01:19:04,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 01:19:04,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-15 01:19:04,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-15 01:19:04,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-15 01:19:04,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-15 01:19:04,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-15 01:19:04,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-15 01:19:04,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 01:19:04,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 01:19:04,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 01:19:04,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 01:19:04,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 01:19:04,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 01:19:04,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 01:19:04,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 01:19:04,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 01:19:04,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 01:19:04,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 01:19:04,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 01:19:04,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 01:19:04,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 01:19:04,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 01:19:04,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 01:19:04,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 01:19:04,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 01:19:04,345 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 01:19:04,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 01:19:04,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 01:19:04,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 01:19:04,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 01:19:04,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 01:19:04,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 01:19:04,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 01:19:04,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 01:19:04,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 01:19:04,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 01:19:04,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 01:19:04,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 01:19:04,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 01:19:04,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 01:19:04,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 01:19:04,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 01:19:04,632 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 01:19:04,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-04-15 01:19:04,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed69424d5/656740a16cbf4a7db6dbbfc9f0e265b0/FLAGb7ef91be2 [2021-04-15 01:19:05,081 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 01:19:05,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2021-04-15 01:19:05,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed69424d5/656740a16cbf4a7db6dbbfc9f0e265b0/FLAGb7ef91be2 [2021-04-15 01:19:05,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed69424d5/656740a16cbf4a7db6dbbfc9f0e265b0 [2021-04-15 01:19:05,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 01:19:05,406 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-15 01:19:05,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 01:19:05,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 01:19:05,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 01:19:05,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:19:05" (1/1) ... [2021-04-15 01:19:05,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e1a31a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:05, skipping insertion in model container [2021-04-15 01:19:05,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 01:19:05" (1/1) ... [2021-04-15 01:19:05,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 01:19:05,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 01:19:05,589 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-04-15 01:19:05,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:19:05,839 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 01:19:05,849 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2021-04-15 01:19:05,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 01:19:06,014 INFO L208 MainTranslator]: Completed translation [2021-04-15 01:19:06,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06 WrapperNode [2021-04-15 01:19:06,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 01:19:06,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 01:19:06,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 01:19:06,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 01:19:06,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 01:19:06,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 01:19:06,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 01:19:06,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 01:19:06,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (1/1) ... [2021-04-15 01:19:06,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 01:19:06,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 01:19:06,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 01:19:06,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 01:19:06,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (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 [2021-04-15 01:19:06,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 01:19:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 01:19:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 01:19:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 01:19:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-04-15 01:19:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2021-04-15 01:19:06,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2021-04-15 01:19:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 01:19:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 01:19:06,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 01:19:06,134 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 01:19:06,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 01:19:06,390 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-04-15 01:19:06,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:19:06 BoogieIcfgContainer [2021-04-15 01:19:06,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 01:19:06,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 01:19:06,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 01:19:06,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 01:19:06,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 01:19:05" (1/3) ... [2021-04-15 01:19:06,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9d9b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:19:06, skipping insertion in model container [2021-04-15 01:19:06,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 01:19:06" (2/3) ... [2021-04-15 01:19:06,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9d9b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 01:19:06, skipping insertion in model container [2021-04-15 01:19:06,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 01:19:06" (3/3) ... [2021-04-15 01:19:06,396 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2021-04-15 01:19:06,399 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 01:19:06,399 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 01:19:06,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 01:19:06,402 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,420 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,421 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,421 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,421 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,423 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,423 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,424 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,424 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,424 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,424 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,425 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,426 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,427 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,427 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,427 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,427 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,428 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,429 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,429 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,429 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,429 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,429 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,430 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,431 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,431 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,431 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-15 01:19:06,437 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-04-15 01:19:06,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-04-15 01:19:06,458 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 01:19:06,458 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 01:19:06,458 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 01:19:06,458 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 01:19:06,458 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 01:19:06,458 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 01:19:06,458 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 01:19:06,458 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 01:19:06,464 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 83 places, 86 transitions, 180 flow [2021-04-15 01:19:06,477 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 01:19:06,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:06,486 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:06,487 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash -638211894, now seen corresponding path program 1 times [2021-04-15 01:19:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:06,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585373063] [2021-04-15 01:19:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:19:06,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585373063] [2021-04-15 01:19:06,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:19:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 01:19:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204363531] [2021-04-15 01:19:06,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-04-15 01:19:06,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-04-15 01:19:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:19:06,669 INFO L87 Difference]: Start difference. First operand has 317 states, 315 states have (on average 2.0317460317460316) internal successors, (640), 316 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:06,693 INFO L93 Difference]: Finished difference Result 309 states and 579 transitions. [2021-04-15 01:19:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-04-15 01:19:06,693 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-04-15 01:19:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:06,705 INFO L225 Difference]: With dead ends: 309 [2021-04-15 01:19:06,705 INFO L226 Difference]: Without dead ends: 272 [2021-04-15 01:19:06,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-04-15 01:19:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-04-15 01:19:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-04-15 01:19:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.867158671586716) internal successors, (506), 271 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 506 transitions. [2021-04-15 01:19:06,740 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 506 transitions. Word has length 50 [2021-04-15 01:19:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:06,740 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 506 transitions. [2021-04-15 01:19:06,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 506 transitions. [2021-04-15 01:19:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 01:19:06,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:06,742 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:06,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 01:19:06,742 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1081853556, now seen corresponding path program 1 times [2021-04-15 01:19:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:06,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126543707] [2021-04-15 01:19:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:19:06,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126543707] [2021-04-15 01:19:06,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:19:06,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 01:19:06,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456191942] [2021-04-15 01:19:06,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:19:06,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:06,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:19:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:19:06,797 INFO L87 Difference]: Start difference. First operand 272 states and 506 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:06,810 INFO L93 Difference]: Finished difference Result 398 states and 758 transitions. [2021-04-15 01:19:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:19:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-04-15 01:19:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:06,811 INFO L225 Difference]: With dead ends: 398 [2021-04-15 01:19:06,811 INFO L226 Difference]: Without dead ends: 398 [2021-04-15 01:19:06,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:19:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-04-15 01:19:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 290. [2021-04-15 01:19:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.8754325259515572) internal successors, (542), 289 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 542 transitions. [2021-04-15 01:19:06,823 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 542 transitions. Word has length 50 [2021-04-15 01:19:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:06,823 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 542 transitions. [2021-04-15 01:19:06,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 542 transitions. [2021-04-15 01:19:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-04-15 01:19:06,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:06,825 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:06,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 01:19:06,825 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash 802569496, now seen corresponding path program 1 times [2021-04-15 01:19:06,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:06,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331551870] [2021-04-15 01:19:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:19:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331551870] [2021-04-15 01:19:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376794311] [2021-04-15 01:19:06,887 INFO L95 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 [2021-04-15 01:19:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-04-15 01:19:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:19:07,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 01:19:07,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-04-15 01:19:07,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395585760] [2021-04-15 01:19:07,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:19:07,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:19:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 01:19:07,122 INFO L87 Difference]: Start difference. First operand 290 states and 542 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:07,142 INFO L93 Difference]: Finished difference Result 430 states and 822 transitions. [2021-04-15 01:19:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:19:07,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-04-15 01:19:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:07,144 INFO L225 Difference]: With dead ends: 430 [2021-04-15 01:19:07,144 INFO L226 Difference]: Without dead ends: 430 [2021-04-15 01:19:07,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 01:19:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-04-15 01:19:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-04-15 01:19:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.881188118811881) internal successors, (570), 303 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 570 transitions. [2021-04-15 01:19:07,160 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 570 transitions. Word has length 58 [2021-04-15 01:19:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:07,160 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 570 transitions. [2021-04-15 01:19:07,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 570 transitions. [2021-04-15 01:19:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-15 01:19:07,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:07,162 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:07,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 01:19:07,379 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 349313876, now seen corresponding path program 1 times [2021-04-15 01:19:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:07,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080769025] [2021-04-15 01:19:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:19:07,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080769025] [2021-04-15 01:19:07,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905720130] [2021-04-15 01:19:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 01:19:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:19:07,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:07,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 01:19:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55414027] [2021-04-15 01:19:07,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 01:19:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 01:19:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 01:19:07,720 INFO L87 Difference]: Start difference. First operand 304 states and 570 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:07,748 INFO L93 Difference]: Finished difference Result 570 states and 1102 transitions. [2021-04-15 01:19:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 01:19:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-15 01:19:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:07,750 INFO L225 Difference]: With dead ends: 570 [2021-04-15 01:19:07,750 INFO L226 Difference]: Without dead ends: 570 [2021-04-15 01:19:07,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 01:19:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-04-15 01:19:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 456. [2021-04-15 01:19:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.920879120879121) internal successors, (874), 455 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 874 transitions. [2021-04-15 01:19:07,758 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 874 transitions. Word has length 69 [2021-04-15 01:19:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:07,759 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 874 transitions. [2021-04-15 01:19:07,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 874 transitions. [2021-04-15 01:19:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-04-15 01:19:07,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:07,761 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:07,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:07,978 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash -333116662, now seen corresponding path program 2 times [2021-04-15 01:19:07,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:07,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818199199] [2021-04-15 01:19:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-04-15 01:19:08,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818199199] [2021-04-15 01:19:08,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001315542] [2021-04-15 01:19:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:08,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:19:08,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 01:19:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 01:19:08,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:08,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-04-15 01:19:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869577165] [2021-04-15 01:19:08,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 01:19:08,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:08,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 01:19:08,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 01:19:08,274 INFO L87 Difference]: Start difference. First operand 456 states and 874 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:08,745 INFO L93 Difference]: Finished difference Result 1442 states and 2846 transitions. [2021-04-15 01:19:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 01:19:08,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-04-15 01:19:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:08,749 INFO L225 Difference]: With dead ends: 1442 [2021-04-15 01:19:08,749 INFO L226 Difference]: Without dead ends: 1442 [2021-04-15 01:19:08,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 01:19:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-04-15 01:19:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 938. [2021-04-15 01:19:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.961579509071505) internal successors, (1838), 937 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1838 transitions. [2021-04-15 01:19:08,769 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1838 transitions. Word has length 77 [2021-04-15 01:19:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:08,769 INFO L480 AbstractCegarLoop]: Abstraction has 938 states and 1838 transitions. [2021-04-15 01:19:08,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1838 transitions. [2021-04-15 01:19:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 01:19:08,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:08,772 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:08,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:08,989 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash -88171860, now seen corresponding path program 3 times [2021-04-15 01:19:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:08,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965577023] [2021-04-15 01:19:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-04-15 01:19:09,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965577023] [2021-04-15 01:19:09,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159638272] [2021-04-15 01:19:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:09,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 01:19:09,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 01:19:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-04-15 01:19:09,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:09,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-04-15 01:19:09,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176269611] [2021-04-15 01:19:09,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 01:19:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 01:19:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 01:19:09,337 INFO L87 Difference]: Start difference. First operand 938 states and 1838 transitions. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:10,488 INFO L93 Difference]: Finished difference Result 2238 states and 4438 transitions. [2021-04-15 01:19:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-04-15 01:19:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 01:19:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:10,497 INFO L225 Difference]: With dead ends: 2238 [2021-04-15 01:19:10,497 INFO L226 Difference]: Without dead ends: 2238 [2021-04-15 01:19:10,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3395 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=2000, Invalid=6742, Unknown=0, NotChecked=0, Total=8742 [2021-04-15 01:19:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-04-15 01:19:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1596. [2021-04-15 01:19:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 1.9774294670846395) internal successors, (3154), 1595 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 3154 transitions. [2021-04-15 01:19:10,538 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 3154 transitions. Word has length 96 [2021-04-15 01:19:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:10,538 INFO L480 AbstractCegarLoop]: Abstraction has 1596 states and 3154 transitions. [2021-04-15 01:19:10,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 3154 transitions. [2021-04-15 01:19:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-04-15 01:19:10,540 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:10,540 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:10,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:10,755 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2080944246, now seen corresponding path program 4 times [2021-04-15 01:19:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:10,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019695617] [2021-04-15 01:19:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:10,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019695617] [2021-04-15 01:19:10,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693182283] [2021-04-15 01:19:10,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:10,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:19:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:10,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:19:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:11,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:11,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-04-15 01:19:11,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425753896] [2021-04-15 01:19:11,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 01:19:11,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 01:19:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 01:19:11,079 INFO L87 Difference]: Start difference. First operand 1596 states and 3154 transitions. Second operand has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:11,155 INFO L93 Difference]: Finished difference Result 2170 states and 4302 transitions. [2021-04-15 01:19:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 01:19:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-04-15 01:19:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:11,161 INFO L225 Difference]: With dead ends: 2170 [2021-04-15 01:19:11,161 INFO L226 Difference]: Without dead ends: 2170 [2021-04-15 01:19:11,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:19:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-04-15 01:19:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1924. [2021-04-15 01:19:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 1.9812792511700468) internal successors, (3810), 1923 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 3810 transitions. [2021-04-15 01:19:11,193 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 3810 transitions. Word has length 115 [2021-04-15 01:19:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:11,193 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 3810 transitions. [2021-04-15 01:19:11,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 3810 transitions. [2021-04-15 01:19:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-04-15 01:19:11,196 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:11,196 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:11,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 01:19:11,412 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:11,412 INFO L82 PathProgramCache]: Analyzing trace with hash -496463444, now seen corresponding path program 5 times [2021-04-15 01:19:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:11,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101815976] [2021-04-15 01:19:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101815976] [2021-04-15 01:19:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794041728] [2021-04-15 01:19:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 01:19:11,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 01:19:11,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:19:11,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:11,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:11,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-04-15 01:19:11,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223705500] [2021-04-15 01:19:11,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 01:19:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 01:19:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 01:19:11,775 INFO L87 Difference]: Start difference. First operand 1924 states and 3810 transitions. Second operand has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:11,906 INFO L93 Difference]: Finished difference Result 2498 states and 4958 transitions. [2021-04-15 01:19:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 01:19:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-04-15 01:19:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:11,912 INFO L225 Difference]: With dead ends: 2498 [2021-04-15 01:19:11,912 INFO L226 Difference]: Without dead ends: 2498 [2021-04-15 01:19:11,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:19:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-04-15 01:19:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2252. [2021-04-15 01:19:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.9840071079520214) internal successors, (4466), 2251 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 4466 transitions. [2021-04-15 01:19:11,942 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 4466 transitions. Word has length 123 [2021-04-15 01:19:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:11,942 INFO L480 AbstractCegarLoop]: Abstraction has 2252 states and 4466 transitions. [2021-04-15 01:19:11,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 4466 transitions. [2021-04-15 01:19:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-04-15 01:19:11,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:11,947 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:12,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:12,162 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:12,163 INFO L82 PathProgramCache]: Analyzing trace with hash -439952158, now seen corresponding path program 6 times [2021-04-15 01:19:12,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:12,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581894461] [2021-04-15 01:19:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:12,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581894461] [2021-04-15 01:19:12,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863530662] [2021-04-15 01:19:12,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 01:19:12,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 01:19:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 01:19:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:12,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:12,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 01:19:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730379752] [2021-04-15 01:19:12,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 01:19:12,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 01:19:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 01:19:12,535 INFO L87 Difference]: Start difference. First operand 2252 states and 4466 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:12,668 INFO L93 Difference]: Finished difference Result 2826 states and 5614 transitions. [2021-04-15 01:19:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 01:19:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-04-15 01:19:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:12,675 INFO L225 Difference]: With dead ends: 2826 [2021-04-15 01:19:12,675 INFO L226 Difference]: Without dead ends: 2826 [2021-04-15 01:19:12,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-04-15 01:19:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-04-15 01:19:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2580. [2021-04-15 01:19:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2579 states have (on average 1.9860411012020163) internal successors, (5122), 2579 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 5122 transitions. [2021-04-15 01:19:12,708 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 5122 transitions. Word has length 131 [2021-04-15 01:19:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:12,708 INFO L480 AbstractCegarLoop]: Abstraction has 2580 states and 5122 transitions. [2021-04-15 01:19:12,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 5122 transitions. [2021-04-15 01:19:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-04-15 01:19:12,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:12,713 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:12,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:12,927 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash -31878632, now seen corresponding path program 7 times [2021-04-15 01:19:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:12,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970038984] [2021-04-15 01:19:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:13,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970038984] [2021-04-15 01:19:13,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22720213] [2021-04-15 01:19:13,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 01:19:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 01:19:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:13,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:13,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-04-15 01:19:13,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088980403] [2021-04-15 01:19:13,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 01:19:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 01:19:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-04-15 01:19:13,340 INFO L87 Difference]: Start difference. First operand 2580 states and 5122 transitions. Second operand has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:13,504 INFO L93 Difference]: Finished difference Result 3154 states and 6270 transitions. [2021-04-15 01:19:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 01:19:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-04-15 01:19:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:13,513 INFO L225 Difference]: With dead ends: 3154 [2021-04-15 01:19:13,513 INFO L226 Difference]: Without dead ends: 3154 [2021-04-15 01:19:13,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 01:19:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-04-15 01:19:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2908. [2021-04-15 01:19:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 1.9876160990712075) internal successors, (5778), 2907 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 5778 transitions. [2021-04-15 01:19:13,546 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 5778 transitions. Word has length 139 [2021-04-15 01:19:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:13,546 INFO L480 AbstractCegarLoop]: Abstraction has 2908 states and 5778 transitions. [2021-04-15 01:19:13,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 5778 transitions. [2021-04-15 01:19:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-04-15 01:19:13,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:13,550 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:13,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 01:19:13,765 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1297527118, now seen corresponding path program 8 times [2021-04-15 01:19:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:13,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433775028] [2021-04-15 01:19:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:13,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433775028] [2021-04-15 01:19:13,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252795450] [2021-04-15 01:19:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 01:19:13,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:19:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 01:19:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:14,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:14,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-04-15 01:19:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554950182] [2021-04-15 01:19:14,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 01:19:14,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 01:19:14,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:19:14,174 INFO L87 Difference]: Start difference. First operand 2908 states and 5778 transitions. Second operand has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:14,373 INFO L93 Difference]: Finished difference Result 3482 states and 6926 transitions. [2021-04-15 01:19:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 01:19:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-04-15 01:19:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:14,382 INFO L225 Difference]: With dead ends: 3482 [2021-04-15 01:19:14,382 INFO L226 Difference]: Without dead ends: 3482 [2021-04-15 01:19:14,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 01:19:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-04-15 01:19:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 3236. [2021-04-15 01:19:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 1.98887171561051) internal successors, (6434), 3235 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 6434 transitions. [2021-04-15 01:19:14,429 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 6434 transitions. Word has length 147 [2021-04-15 01:19:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:14,430 INFO L480 AbstractCegarLoop]: Abstraction has 3236 states and 6434 transitions. [2021-04-15 01:19:14,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 6434 transitions. [2021-04-15 01:19:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-04-15 01:19:14,435 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:14,435 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:14,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:14,645 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1619772796, now seen corresponding path program 9 times [2021-04-15 01:19:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:14,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732797239] [2021-04-15 01:19:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-04-15 01:19:14,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732797239] [2021-04-15 01:19:14,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729013884] [2021-04-15 01:19:14,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 01:19:14,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 01:19:14,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 01:19:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-04-15 01:19:15,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:15,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-04-15 01:19:15,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614187024] [2021-04-15 01:19:15,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 01:19:15,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 01:19:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-04-15 01:19:15,104 INFO L87 Difference]: Start difference. First operand 3236 states and 6434 transitions. Second operand has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:22,518 INFO L93 Difference]: Finished difference Result 5650 states and 11262 transitions. [2021-04-15 01:19:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-04-15 01:19:22,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-04-15 01:19:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:22,529 INFO L225 Difference]: With dead ends: 5650 [2021-04-15 01:19:22,529 INFO L226 Difference]: Without dead ends: 5650 [2021-04-15 01:19:22,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50979 ImplicationChecksByTransitivity, 6861.5ms TimeCoverageRelationStatistics Valid=21579, Invalid=88313, Unknown=0, NotChecked=0, Total=109892 [2021-04-15 01:19:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2021-04-15 01:19:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 4510. [2021-04-15 01:19:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.9920159680638723) internal successors, (8982), 4509 states have internal predecessors, (8982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 8982 transitions. [2021-04-15 01:19:22,605 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 8982 transitions. Word has length 155 [2021-04-15 01:19:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:22,605 INFO L480 AbstractCegarLoop]: Abstraction has 4510 states and 8982 transitions. [2021-04-15 01:19:22,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 8982 transitions. [2021-04-15 01:19:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-04-15 01:19:22,612 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:22,612 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:22,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:19:22,829 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1357590158, now seen corresponding path program 10 times [2021-04-15 01:19:22,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:22,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280600883] [2021-04-15 01:19:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-04-15 01:19:23,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280600883] [2021-04-15 01:19:23,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125198226] [2021-04-15 01:19:23,007 INFO L93 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 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 [2021-04-15 01:19:23,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:19:23,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:23,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 01:19:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-04-15 01:19:23,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:23,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-04-15 01:19:23,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484325043] [2021-04-15 01:19:23,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 01:19:23,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 01:19:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:19:23,294 INFO L87 Difference]: Start difference. First operand 4510 states and 8982 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:23,600 INFO L93 Difference]: Finished difference Result 5238 states and 10438 transitions. [2021-04-15 01:19:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 01:19:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-04-15 01:19:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:23,606 INFO L225 Difference]: With dead ends: 5238 [2021-04-15 01:19:23,606 INFO L226 Difference]: Without dead ends: 5238 [2021-04-15 01:19:23,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 01:19:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-04-15 01:19:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4926. [2021-04-15 01:19:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 4925 states have (on average 1.9926903553299493) internal successors, (9814), 4925 states have internal predecessors, (9814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 9814 transitions. [2021-04-15 01:19:23,664 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 9814 transitions. Word has length 174 [2021-04-15 01:19:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:23,664 INFO L480 AbstractCegarLoop]: Abstraction has 4926 states and 9814 transitions. [2021-04-15 01:19:23,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 9814 transitions. [2021-04-15 01:19:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-04-15 01:19:23,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:23,672 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:23,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 01:19:23,887 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:23,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1679739268, now seen corresponding path program 11 times [2021-04-15 01:19:23,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:23,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770999785] [2021-04-15 01:19:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-04-15 01:19:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770999785] [2021-04-15 01:19:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661583127] [2021-04-15 01:19:24,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 01:19:24,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-04-15 01:19:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 01:19:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2021-04-15 01:19:24,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:24,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2021-04-15 01:19:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594049413] [2021-04-15 01:19:24,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 01:19:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 01:19:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 01:19:24,523 INFO L87 Difference]: Start difference. First operand 4926 states and 9814 transitions. Second operand has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:19:39,842 INFO L93 Difference]: Finished difference Result 7814 states and 15590 transitions. [2021-04-15 01:19:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 491 states. [2021-04-15 01:19:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-04-15 01:19:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:19:39,850 INFO L225 Difference]: With dead ends: 7814 [2021-04-15 01:19:39,850 INFO L226 Difference]: Without dead ends: 7814 [2021-04-15 01:19:39,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 1150 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122788 ImplicationChecksByTransitivity, 14563.0ms TimeCoverageRelationStatistics Valid=47940, Invalid=207590, Unknown=0, NotChecked=0, Total=255530 [2021-04-15 01:19:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2021-04-15 01:19:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 6464. [2021-04-15 01:19:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6464 states, 6463 states have (on average 1.9944298313476714) internal successors, (12890), 6463 states have internal predecessors, (12890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 12890 transitions. [2021-04-15 01:19:39,919 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 12890 transitions. Word has length 182 [2021-04-15 01:19:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:19:39,919 INFO L480 AbstractCegarLoop]: Abstraction has 6464 states and 12890 transitions. [2021-04-15 01:19:39,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.147058823529412) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:19:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 12890 transitions. [2021-04-15 01:19:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-04-15 01:19:39,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:19:39,927 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:19:40,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 01:19:40,141 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:19:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:19:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1218447834, now seen corresponding path program 12 times [2021-04-15 01:19:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:19:40,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266349665] [2021-04-15 01:19:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:19:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:19:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-04-15 01:19:40,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266349665] [2021-04-15 01:19:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533965313] [2021-04-15 01:19:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 01:19:40,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-04-15 01:19:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:19:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 01:19:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:19:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-04-15 01:19:40,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:19:40,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-04-15 01:19:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510266753] [2021-04-15 01:19:40,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 01:19:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:19:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 01:19:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 01:19:40,905 INFO L87 Difference]: Start difference. First operand 6464 states and 12890 transitions. Second operand has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:20:07,314 INFO L93 Difference]: Finished difference Result 9666 states and 19294 transitions. [2021-04-15 01:20:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 647 states. [2021-04-15 01:20:07,314 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-04-15 01:20:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:20:07,323 INFO L225 Difference]: With dead ends: 9666 [2021-04-15 01:20:07,323 INFO L226 Difference]: Without dead ends: 9666 [2021-04-15 01:20:07,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215472 ImplicationChecksByTransitivity, 25087.4ms TimeCoverageRelationStatistics Valid=80318, Invalid=359914, Unknown=0, NotChecked=0, Total=440232 [2021-04-15 01:20:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-04-15 01:20:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8178. [2021-04-15 01:20:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8178 states, 8177 states have (on average 1.9955974073621132) internal successors, (16318), 8177 states have internal predecessors, (16318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8178 states to 8178 states and 16318 transitions. [2021-04-15 01:20:07,423 INFO L78 Accepts]: Start accepts. Automaton has 8178 states and 16318 transitions. Word has length 201 [2021-04-15 01:20:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:20:07,424 INFO L480 AbstractCegarLoop]: Abstraction has 8178 states and 16318 transitions. [2021-04-15 01:20:07,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 6.0) internal successors, (228), 38 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8178 states and 16318 transitions. [2021-04-15 01:20:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-04-15 01:20:07,435 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:20:07,435 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:20:07,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 01:20:07,649 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:20:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:20:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1455154416, now seen corresponding path program 13 times [2021-04-15 01:20:07,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:20:07,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100711524] [2021-04-15 01:20:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:20:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:20:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-04-15 01:20:07,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100711524] [2021-04-15 01:20:07,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564845780] [2021-04-15 01:20:07,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 01:20:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:20:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 01:20:08,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:20:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-04-15 01:20:08,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:20:08,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-04-15 01:20:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437328366] [2021-04-15 01:20:08,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 01:20:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:20:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 01:20:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-04-15 01:20:08,330 INFO L87 Difference]: Start difference. First operand 8178 states and 16318 transitions. Second operand has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:20:08,847 INFO L93 Difference]: Finished difference Result 9214 states and 18390 transitions. [2021-04-15 01:20:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 01:20:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-04-15 01:20:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:20:08,857 INFO L225 Difference]: With dead ends: 9214 [2021-04-15 01:20:08,857 INFO L226 Difference]: Without dead ends: 9214 [2021-04-15 01:20:08,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 01:20:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2021-04-15 01:20:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8770. [2021-04-15 01:20:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 1.9958946288060213) internal successors, (17502), 8769 states have internal predecessors, (17502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 17502 transitions. [2021-04-15 01:20:08,952 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 17502 transitions. Word has length 220 [2021-04-15 01:20:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:20:08,953 INFO L480 AbstractCegarLoop]: Abstraction has 8770 states and 17502 transitions. [2021-04-15 01:20:08,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 17502 transitions. [2021-04-15 01:20:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-04-15 01:20:08,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:20:08,963 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:20:09,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:20:09,177 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:20:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:20:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -655540582, now seen corresponding path program 14 times [2021-04-15 01:20:09,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:20:09,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575258599] [2021-04-15 01:20:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:20:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:20:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-04-15 01:20:09,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575258599] [2021-04-15 01:20:09,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508514612] [2021-04-15 01:20:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 01:20:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:20:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:20:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 01:20:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:20:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-04-15 01:20:09,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:20:09,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-04-15 01:20:09,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035631952] [2021-04-15 01:20:09,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 01:20:09,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:20:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 01:20:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 01:20:09,958 INFO L87 Difference]: Start difference. First operand 8770 states and 17502 transitions. Second operand has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:20:10,600 INFO L93 Difference]: Finished difference Result 9806 states and 19574 transitions. [2021-04-15 01:20:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 01:20:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-04-15 01:20:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:20:10,614 INFO L225 Difference]: With dead ends: 9806 [2021-04-15 01:20:10,614 INFO L226 Difference]: Without dead ends: 9806 [2021-04-15 01:20:10,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 760.7ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 01:20:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9806 states. [2021-04-15 01:20:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9806 to 9362. [2021-04-15 01:20:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9362 states, 9361 states have (on average 1.9961542570238222) internal successors, (18686), 9361 states have internal predecessors, (18686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9362 states to 9362 states and 18686 transitions. [2021-04-15 01:20:10,705 INFO L78 Accepts]: Start accepts. Automaton has 9362 states and 18686 transitions. Word has length 228 [2021-04-15 01:20:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:20:10,705 INFO L480 AbstractCegarLoop]: Abstraction has 9362 states and 18686 transitions. [2021-04-15 01:20:10,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.575757575757576) internal successors, (184), 33 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:20:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9362 states and 18686 transitions. [2021-04-15 01:20:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-04-15 01:20:10,716 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:20:10,716 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:20:10,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 01:20:10,931 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:20:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:20:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1750648796, now seen corresponding path program 15 times [2021-04-15 01:20:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:20:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593397086] [2021-04-15 01:20:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:20:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:20:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-04-15 01:20:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593397086] [2021-04-15 01:20:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785044138] [2021-04-15 01:20:11,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 01:20:11,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 01:20:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:20:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 01:20:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:20:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-04-15 01:20:11,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:20:11,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2021-04-15 01:20:11,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066486634] [2021-04-15 01:20:11,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-04-15 01:20:11,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:20:11,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-04-15 01:20:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 01:20:11,987 INFO L87 Difference]: Start difference. First operand 9362 states and 18686 transitions. Second operand has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:21:08,905 INFO L93 Difference]: Finished difference Result 13198 states and 26358 transitions. [2021-04-15 01:21:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2021-04-15 01:21:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-04-15 01:21:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:21:08,913 INFO L225 Difference]: With dead ends: 13198 [2021-04-15 01:21:08,913 INFO L226 Difference]: Without dead ends: 13198 [2021-04-15 01:21:08,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 960 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461132 ImplicationChecksByTransitivity, 54315.2ms TimeCoverageRelationStatistics Valid=164058, Invalid=760424, Unknown=0, NotChecked=0, Total=924482 [2021-04-15 01:21:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-04-15 01:21:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 11428. [2021-04-15 01:21:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 1.9968495668154371) internal successors, (22818), 11427 states have internal predecessors, (22818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 22818 transitions. [2021-04-15 01:21:09,047 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 22818 transitions. Word has length 236 [2021-04-15 01:21:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:21:09,047 INFO L480 AbstractCegarLoop]: Abstraction has 11428 states and 22818 transitions. [2021-04-15 01:21:09,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 5.717391304347826) internal successors, (263), 46 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 22818 transitions. [2021-04-15 01:21:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-04-15 01:21:09,148 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:21:09,148 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:21:09,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 01:21:09,364 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:21:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:21:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash -404687106, now seen corresponding path program 16 times [2021-04-15 01:21:09,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:21:09,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9230044] [2021-04-15 01:21:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:21:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:21:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-04-15 01:21:09,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9230044] [2021-04-15 01:21:09,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873499103] [2021-04-15 01:21:09,828 INFO L93 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 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 [2021-04-15 01:21:09,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:21:09,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:21:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 01:21:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:21:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-04-15 01:21:10,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:21:10,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-04-15 01:21:10,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203321099] [2021-04-15 01:21:10,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 01:21:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:21:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 01:21:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 01:21:10,402 INFO L87 Difference]: Start difference. First operand 11428 states and 22818 transitions. Second operand has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:21:11,167 INFO L93 Difference]: Finished difference Result 12618 states and 25198 transitions. [2021-04-15 01:21:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 01:21:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-04-15 01:21:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:21:11,178 INFO L225 Difference]: With dead ends: 12618 [2021-04-15 01:21:11,178 INFO L226 Difference]: Without dead ends: 12618 [2021-04-15 01:21:11,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 972.5ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 01:21:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12618 states. [2021-04-15 01:21:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12618 to 12108. [2021-04-15 01:21:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12108 states, 12107 states have (on average 1.997026513587181) internal successors, (24178), 12107 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12108 states to 12108 states and 24178 transitions. [2021-04-15 01:21:11,286 INFO L78 Accepts]: Start accepts. Automaton has 12108 states and 24178 transitions. Word has length 255 [2021-04-15 01:21:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:21:11,286 INFO L480 AbstractCegarLoop]: Abstraction has 12108 states and 24178 transitions. [2021-04-15 01:21:11,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.405405405405405) internal successors, (200), 37 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 12108 states and 24178 transitions. [2021-04-15 01:21:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-04-15 01:21:11,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:21:11,296 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:21:11,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:21:11,512 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:21:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:21:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -564046028, now seen corresponding path program 17 times [2021-04-15 01:21:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:21:11,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479571523] [2021-04-15 01:21:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:21:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:21:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-04-15 01:21:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479571523] [2021-04-15 01:21:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611690025] [2021-04-15 01:21:12,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 01:21:12,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-04-15 01:21:12,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:21:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 01:21:12,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:21:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-04-15 01:21:12,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:21:12,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-04-15 01:21:12,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842116773] [2021-04-15 01:21:12,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-04-15 01:21:12,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:21:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-04-15 01:21:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 01:21:12,624 INFO L87 Difference]: Start difference. First operand 12108 states and 24178 transitions. Second operand has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:21:13,487 INFO L93 Difference]: Finished difference Result 13298 states and 26558 transitions. [2021-04-15 01:21:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 01:21:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-04-15 01:21:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:21:13,498 INFO L225 Difference]: With dead ends: 13298 [2021-04-15 01:21:13,498 INFO L226 Difference]: Without dead ends: 13298 [2021-04-15 01:21:13,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1116.3ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 01:21:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13298 states. [2021-04-15 01:21:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13298 to 12788. [2021-04-15 01:21:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12788 states, 12787 states have (on average 1.9971846406506608) internal successors, (25538), 12787 states have internal predecessors, (25538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12788 states to 12788 states and 25538 transitions. [2021-04-15 01:21:13,715 INFO L78 Accepts]: Start accepts. Automaton has 12788 states and 25538 transitions. Word has length 263 [2021-04-15 01:21:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:21:13,715 INFO L480 AbstractCegarLoop]: Abstraction has 12788 states and 25538 transitions. [2021-04-15 01:21:13,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.333333333333333) internal successors, (208), 39 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:21:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 12788 states and 25538 transitions. [2021-04-15 01:21:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-04-15 01:21:13,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:21:13,726 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:21:13,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:21:13,927 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:21:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:21:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1156653418, now seen corresponding path program 18 times [2021-04-15 01:21:13,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:21:13,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231390659] [2021-04-15 01:21:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:21:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:21:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-04-15 01:21:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231390659] [2021-04-15 01:21:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761920744] [2021-04-15 01:21:14,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 01:21:14,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-04-15 01:21:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:21:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 01:21:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:21:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2021-04-15 01:21:15,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:21:15,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 17] total 54 [2021-04-15 01:21:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462829501] [2021-04-15 01:21:15,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-04-15 01:21:15,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:21:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-04-15 01:21:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 01:21:15,476 INFO L87 Difference]: Start difference. First operand 12788 states and 25538 transitions. Second operand has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:31,281 INFO L93 Difference]: Finished difference Result 17258 states and 34478 transitions. [2021-04-15 01:23:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1289 states. [2021-04-15 01:23:31,282 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-04-15 01:23:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:31,294 INFO L225 Difference]: With dead ends: 17258 [2021-04-15 01:23:31,294 INFO L226 Difference]: Without dead ends: 17258 [2021-04-15 01:23:31,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2829 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 1312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871728 ImplicationChecksByTransitivity, 131057.1ms TimeCoverageRelationStatistics Valid=299970, Invalid=1425312, Unknown=0, NotChecked=0, Total=1725282 [2021-04-15 01:23:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17258 states. [2021-04-15 01:23:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17258 to 15206. [2021-04-15 01:23:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15206 states, 15205 states have (on average 1.997632357777047) internal successors, (30374), 15205 states have internal predecessors, (30374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15206 states to 15206 states and 30374 transitions. [2021-04-15 01:23:31,495 INFO L78 Accepts]: Start accepts. Automaton has 15206 states and 30374 transitions. Word has length 271 [2021-04-15 01:23:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:31,495 INFO L480 AbstractCegarLoop]: Abstraction has 15206 states and 30374 transitions. [2021-04-15 01:23:31,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 15206 states and 30374 transitions. [2021-04-15 01:23:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-04-15 01:23:31,508 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:31,509 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:31,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:31,729 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2113741364, now seen corresponding path program 19 times [2021-04-15 01:23:31,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:31,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657990086] [2021-04-15 01:23:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-04-15 01:23:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657990086] [2021-04-15 01:23:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947815534] [2021-04-15 01:23:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 01:23:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 01:23:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-04-15 01:23:33,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:33,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-04-15 01:23:33,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521428197] [2021-04-15 01:23:33,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-04-15 01:23:33,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-04-15 01:23:33,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 01:23:33,915 INFO L87 Difference]: Start difference. First operand 15206 states and 30374 transitions. Second operand has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:34,150 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-04-15 01:23:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:35,787 INFO L93 Difference]: Finished difference Result 15974 states and 31910 transitions. [2021-04-15 01:23:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-04-15 01:23:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-04-15 01:23:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:35,802 INFO L225 Difference]: With dead ends: 15974 [2021-04-15 01:23:35,802 INFO L226 Difference]: Without dead ends: 15974 [2021-04-15 01:23:35,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2518.1ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 01:23:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15974 states. [2021-04-15 01:23:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15974 to 15974. [2021-04-15 01:23:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15974 states, 15973 states have (on average 1.997746196706943) internal successors, (31910), 15973 states have internal predecessors, (31910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15974 states to 15974 states and 31910 transitions. [2021-04-15 01:23:35,942 INFO L78 Accepts]: Start accepts. Automaton has 15974 states and 31910 transitions. Word has length 290 [2021-04-15 01:23:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:35,942 INFO L480 AbstractCegarLoop]: Abstraction has 15974 states and 31910 transitions. [2021-04-15 01:23:35,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15974 states and 31910 transitions. [2021-04-15 01:23:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-04-15 01:23:35,957 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:35,957 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:36,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 01:23:36,172 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash 905732566, now seen corresponding path program 20 times [2021-04-15 01:23:36,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:36,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105286617] [2021-04-15 01:23:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105286617] [2021-04-15 01:23:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159595436] [2021-04-15 01:23:36,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:36,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:23:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 01:23:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:37,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:37,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-04-15 01:23:37,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663322990] [2021-04-15 01:23:37,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 01:23:37,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 01:23:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-04-15 01:23:37,709 INFO L87 Difference]: Start difference. First operand 15974 states and 31910 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:38,167 INFO L93 Difference]: Finished difference Result 19294 states and 38550 transitions. [2021-04-15 01:23:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 01:23:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2021-04-15 01:23:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:38,183 INFO L225 Difference]: With dead ends: 19294 [2021-04-15 01:23:38,183 INFO L226 Difference]: Without dead ends: 19294 [2021-04-15 01:23:38,183 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 01:23:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19294 states. [2021-04-15 01:23:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19294 to 17800. [2021-04-15 01:23:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17800 states, 17799 states have (on average 1.9979774144614866) internal successors, (35562), 17799 states have internal predecessors, (35562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17800 states to 17800 states and 35562 transitions. [2021-04-15 01:23:38,337 INFO L78 Accepts]: Start accepts. Automaton has 17800 states and 35562 transitions. Word has length 298 [2021-04-15 01:23:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:38,337 INFO L480 AbstractCegarLoop]: Abstraction has 17800 states and 35562 transitions. [2021-04-15 01:23:38,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17800 states and 35562 transitions. [2021-04-15 01:23:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-04-15 01:23:38,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:38,353 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:38,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 01:23:38,553 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1945750570, now seen corresponding path program 21 times [2021-04-15 01:23:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:38,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642112860] [2021-04-15 01:23:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:38,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642112860] [2021-04-15 01:23:38,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789760190] [2021-04-15 01:23:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:39,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 01:23:39,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 01:23:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:40,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:40,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-04-15 01:23:40,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535156443] [2021-04-15 01:23:40,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 01:23:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 01:23:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-04-15 01:23:40,422 INFO L87 Difference]: Start difference. First operand 17800 states and 35562 transitions. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:40,971 INFO L93 Difference]: Finished difference Result 21120 states and 42202 transitions. [2021-04-15 01:23:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 01:23:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2021-04-15 01:23:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:40,989 INFO L225 Difference]: With dead ends: 21120 [2021-04-15 01:23:40,989 INFO L226 Difference]: Without dead ends: 21120 [2021-04-15 01:23:40,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 703.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 01:23:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2021-04-15 01:23:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19626. [2021-04-15 01:23:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 19625 states have (on average 1.9981656050955414) internal successors, (39214), 19625 states have internal predecessors, (39214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 39214 transitions. [2021-04-15 01:23:41,155 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 39214 transitions. Word has length 309 [2021-04-15 01:23:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:41,156 INFO L480 AbstractCegarLoop]: Abstraction has 19626 states and 39214 transitions. [2021-04-15 01:23:41,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 39214 transitions. [2021-04-15 01:23:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-04-15 01:23:41,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:41,171 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:41,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:41,371 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash 336342, now seen corresponding path program 22 times [2021-04-15 01:23:41,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329868458] [2021-04-15 01:23:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:41,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329868458] [2021-04-15 01:23:41,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568149828] [2021-04-15 01:23:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:41,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:23:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 01:23:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2045 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:43,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:43,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-04-15 01:23:43,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924063193] [2021-04-15 01:23:43,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 01:23:43,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:43,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 01:23:43,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-04-15 01:23:43,223 INFO L87 Difference]: Start difference. First operand 19626 states and 39214 transitions. Second operand has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:43,877 INFO L93 Difference]: Finished difference Result 22946 states and 45854 transitions. [2021-04-15 01:23:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 01:23:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2021-04-15 01:23:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:43,898 INFO L225 Difference]: With dead ends: 22946 [2021-04-15 01:23:43,898 INFO L226 Difference]: Without dead ends: 22946 [2021-04-15 01:23:43,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 01:23:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22946 states. [2021-04-15 01:23:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22946 to 21452. [2021-04-15 01:23:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 1.9983217565614657) internal successors, (42866), 21451 states have internal predecessors, (42866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 42866 transitions. [2021-04-15 01:23:44,202 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 42866 transitions. Word has length 320 [2021-04-15 01:23:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:44,202 INFO L480 AbstractCegarLoop]: Abstraction has 21452 states and 42866 transitions. [2021-04-15 01:23:44,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 7.16) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 42866 transitions. [2021-04-15 01:23:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-04-15 01:23:44,219 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:44,219 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:44,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 01:23:44,419 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -385518634, now seen corresponding path program 23 times [2021-04-15 01:23:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:44,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671043764] [2021-04-15 01:23:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:44,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671043764] [2021-04-15 01:23:44,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728946119] [2021-04-15 01:23:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:45,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-04-15 01:23:45,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 01:23:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2156 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:46,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:46,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-04-15 01:23:46,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386497178] [2021-04-15 01:23:46,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 01:23:46,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 01:23:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-04-15 01:23:46,307 INFO L87 Difference]: Start difference. First operand 21452 states and 42866 transitions. Second operand has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:47,014 INFO L93 Difference]: Finished difference Result 24772 states and 49506 transitions. [2021-04-15 01:23:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 01:23:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2021-04-15 01:23:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:47,035 INFO L225 Difference]: With dead ends: 24772 [2021-04-15 01:23:47,035 INFO L226 Difference]: Without dead ends: 24772 [2021-04-15 01:23:47,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 928.8ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 01:23:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24772 states. [2021-04-15 01:23:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24772 to 23278. [2021-04-15 01:23:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23278 states, 23277 states have (on average 1.9984534089444517) internal successors, (46518), 23277 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23278 states to 23278 states and 46518 transitions. [2021-04-15 01:23:47,239 INFO L78 Accepts]: Start accepts. Automaton has 23278 states and 46518 transitions. Word has length 331 [2021-04-15 01:23:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:47,239 INFO L480 AbstractCegarLoop]: Abstraction has 23278 states and 46518 transitions. [2021-04-15 01:23:47,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23278 states and 46518 transitions. [2021-04-15 01:23:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-04-15 01:23:47,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:47,257 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:47,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:47,458 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1191043542, now seen corresponding path program 24 times [2021-04-15 01:23:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900400217] [2021-04-15 01:23:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900400217] [2021-04-15 01:23:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697080291] [2021-04-15 01:23:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:48,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-04-15 01:23:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 01:23:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 738 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:49,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:49,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-04-15 01:23:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784715188] [2021-04-15 01:23:49,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 01:23:49,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 01:23:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-04-15 01:23:49,754 INFO L87 Difference]: Start difference. First operand 23278 states and 46518 transitions. Second operand has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:50,609 INFO L93 Difference]: Finished difference Result 26598 states and 53158 transitions. [2021-04-15 01:23:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 01:23:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2021-04-15 01:23:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:50,633 INFO L225 Difference]: With dead ends: 26598 [2021-04-15 01:23:50,633 INFO L226 Difference]: Without dead ends: 26598 [2021-04-15 01:23:50,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 01:23:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26598 states. [2021-04-15 01:23:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26598 to 25104. [2021-04-15 01:23:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25104 states, 25103 states have (on average 1.9985659084571565) internal successors, (50170), 25103 states have internal predecessors, (50170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25104 states to 25104 states and 50170 transitions. [2021-04-15 01:23:50,898 INFO L78 Accepts]: Start accepts. Automaton has 25104 states and 50170 transitions. Word has length 342 [2021-04-15 01:23:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:50,898 INFO L480 AbstractCegarLoop]: Abstraction has 25104 states and 50170 transitions. [2021-04-15 01:23:50,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.931034482758621) internal successors, (201), 29 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25104 states and 50170 transitions. [2021-04-15 01:23:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-04-15 01:23:50,921 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:50,921 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:51,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 01:23:51,121 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1393865686, now seen corresponding path program 25 times [2021-04-15 01:23:51,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:51,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569002128] [2021-04-15 01:23:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:51,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569002128] [2021-04-15 01:23:51,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296289730] [2021-04-15 01:23:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 01:23:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 871 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:53,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:53,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-04-15 01:23:53,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552306279] [2021-04-15 01:23:53,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 01:23:53,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 01:23:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-04-15 01:23:53,176 INFO L87 Difference]: Start difference. First operand 25104 states and 50170 transitions. Second operand has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:54,089 INFO L93 Difference]: Finished difference Result 28424 states and 56810 transitions. [2021-04-15 01:23:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 01:23:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 353 [2021-04-15 01:23:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:54,113 INFO L225 Difference]: With dead ends: 28424 [2021-04-15 01:23:54,114 INFO L226 Difference]: Without dead ends: 28424 [2021-04-15 01:23:54,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1257.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 01:23:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28424 states. [2021-04-15 01:23:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28424 to 26930. [2021-04-15 01:23:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26930 states, 26929 states have (on average 1.9986631512495823) internal successors, (53822), 26929 states have internal predecessors, (53822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26930 states to 26930 states and 53822 transitions. [2021-04-15 01:23:54,430 INFO L78 Accepts]: Start accepts. Automaton has 26930 states and 53822 transitions. Word has length 353 [2021-04-15 01:23:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:54,430 INFO L480 AbstractCegarLoop]: Abstraction has 26930 states and 53822 transitions. [2021-04-15 01:23:54,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.838709677419355) internal successors, (212), 31 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 26930 states and 53822 transitions. [2021-04-15 01:23:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-04-15 01:23:54,454 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:54,455 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:54,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 01:23:54,665 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1226399274, now seen corresponding path program 26 times [2021-04-15 01:23:54,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:54,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894034302] [2021-04-15 01:23:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1015 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894034302] [2021-04-15 01:23:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812910169] [2021-04-15 01:23:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:55,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:23:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 01:23:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:23:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 0 proven. 1015 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:56,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:23:56,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-04-15 01:23:56,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721602105] [2021-04-15 01:23:56,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 01:23:56,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:23:56,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 01:23:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 01:23:56,902 INFO L87 Difference]: Start difference. First operand 26930 states and 53822 transitions. Second operand has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:23:57,924 INFO L93 Difference]: Finished difference Result 30250 states and 60462 transitions. [2021-04-15 01:23:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 01:23:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2021-04-15 01:23:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:23:57,949 INFO L225 Difference]: With dead ends: 30250 [2021-04-15 01:23:57,949 INFO L226 Difference]: Without dead ends: 30250 [2021-04-15 01:23:57,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1467.1ms TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 01:23:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30250 states. [2021-04-15 01:23:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30250 to 28756. [2021-04-15 01:23:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28756 states, 28755 states have (on average 1.9987480438184664) internal successors, (57474), 28755 states have internal predecessors, (57474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28756 states to 28756 states and 57474 transitions. [2021-04-15 01:23:58,216 INFO L78 Accepts]: Start accepts. Automaton has 28756 states and 57474 transitions. Word has length 364 [2021-04-15 01:23:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:23:58,217 INFO L480 AbstractCegarLoop]: Abstraction has 28756 states and 57474 transitions. [2021-04-15 01:23:58,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:23:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28756 states and 57474 transitions. [2021-04-15 01:23:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-04-15 01:23:58,241 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:23:58,241 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:23:58,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 01:23:58,441 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:23:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:23:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1640762410, now seen corresponding path program 27 times [2021-04-15 01:23:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:23:58,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477164675] [2021-04-15 01:23:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:23:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:23:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:23:59,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477164675] [2021-04-15 01:23:59,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138002483] [2021-04-15 01:23:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:23:59,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-04-15 01:23:59,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:23:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 01:23:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:01,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-04-15 01:24:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095214305] [2021-04-15 01:24:01,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-04-15 01:24:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-04-15 01:24:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 01:24:01,094 INFO L87 Difference]: Start difference. First operand 28756 states and 57474 transitions. Second operand has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:24:02,302 INFO L93 Difference]: Finished difference Result 32076 states and 64114 transitions. [2021-04-15 01:24:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 01:24:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 375 [2021-04-15 01:24:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:24:02,330 INFO L225 Difference]: With dead ends: 32076 [2021-04-15 01:24:02,330 INFO L226 Difference]: Without dead ends: 32076 [2021-04-15 01:24:02,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1631.1ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 01:24:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32076 states. [2021-04-15 01:24:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32076 to 30582. [2021-04-15 01:24:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30582 states, 30581 states have (on average 1.998822798469638) internal successors, (61126), 30581 states have internal predecessors, (61126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30582 states to 30582 states and 61126 transitions. [2021-04-15 01:24:02,617 INFO L78 Accepts]: Start accepts. Automaton has 30582 states and 61126 transitions. Word has length 375 [2021-04-15 01:24:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:24:02,618 INFO L480 AbstractCegarLoop]: Abstraction has 30582 states and 61126 transitions. [2021-04-15 01:24:02,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.685714285714286) internal successors, (234), 35 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30582 states and 61126 transitions. [2021-04-15 01:24:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-04-15 01:24:02,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:24:02,645 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:24:02,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:02,849 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:24:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:24:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash -71343658, now seen corresponding path program 28 times [2021-04-15 01:24:02,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:24:02,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899266497] [2021-04-15 01:24:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:24:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899266497] [2021-04-15 01:24:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116699635] [2021-04-15 01:24:03,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:03,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:24:03,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:24:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 01:24:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 0 proven. 1336 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:05,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:05,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-04-15 01:24:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547705102] [2021-04-15 01:24:05,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 01:24:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 01:24:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 01:24:05,482 INFO L87 Difference]: Start difference. First operand 30582 states and 61126 transitions. Second operand has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:24:06,772 INFO L93 Difference]: Finished difference Result 33902 states and 67766 transitions. [2021-04-15 01:24:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 01:24:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-04-15 01:24:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:24:06,801 INFO L225 Difference]: With dead ends: 33902 [2021-04-15 01:24:06,801 INFO L226 Difference]: Without dead ends: 33902 [2021-04-15 01:24:06,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1847.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 01:24:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33902 states. [2021-04-15 01:24:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33902 to 32408. [2021-04-15 01:24:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32408 states, 32407 states have (on average 1.9988891288919062) internal successors, (64778), 32407 states have internal predecessors, (64778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32408 states to 32408 states and 64778 transitions. [2021-04-15 01:24:07,107 INFO L78 Accepts]: Start accepts. Automaton has 32408 states and 64778 transitions. Word has length 386 [2021-04-15 01:24:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:24:07,108 INFO L480 AbstractCegarLoop]: Abstraction has 32408 states and 64778 transitions. [2021-04-15 01:24:07,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 6.621621621621622) internal successors, (245), 37 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32408 states and 64778 transitions. [2021-04-15 01:24:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-04-15 01:24:07,135 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:24:07,135 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:24:07,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 01:24:07,337 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:24:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:24:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1637665834, now seen corresponding path program 29 times [2021-04-15 01:24:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:24:07,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077162651] [2021-04-15 01:24:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:24:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077162651] [2021-04-15 01:24:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590835675] [2021-04-15 01:24:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:08,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-04-15 01:24:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:24:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 01:24:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3053 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:09,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:09,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-04-15 01:24:09,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247434532] [2021-04-15 01:24:09,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-04-15 01:24:09,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-04-15 01:24:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 01:24:09,964 INFO L87 Difference]: Start difference. First operand 32408 states and 64778 transitions. Second operand has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:24:11,452 INFO L93 Difference]: Finished difference Result 35728 states and 71418 transitions. [2021-04-15 01:24:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 01:24:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 397 [2021-04-15 01:24:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:24:11,481 INFO L225 Difference]: With dead ends: 35728 [2021-04-15 01:24:11,481 INFO L226 Difference]: Without dead ends: 35728 [2021-04-15 01:24:11,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2023.7ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 01:24:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35728 states. [2021-04-15 01:24:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35728 to 34234. [2021-04-15 01:24:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34234 states, 34233 states have (on average 1.9989483831390764) internal successors, (68430), 34233 states have internal predecessors, (68430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34234 states to 34234 states and 68430 transitions. [2021-04-15 01:24:11,804 INFO L78 Accepts]: Start accepts. Automaton has 34234 states and 68430 transitions. Word has length 397 [2021-04-15 01:24:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:24:11,804 INFO L480 AbstractCegarLoop]: Abstraction has 34234 states and 68430 transitions. [2021-04-15 01:24:11,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 6.564102564102564) internal successors, (256), 39 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 34234 states and 68430 transitions. [2021-04-15 01:24:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-04-15 01:24:11,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:24:11,833 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:24:12,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:12,034 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:24:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:24:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1048043050, now seen corresponding path program 30 times [2021-04-15 01:24:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:24:12,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562245479] [2021-04-15 01:24:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:24:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:13,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562245479] [2021-04-15 01:24:13,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634642029] [2021-04-15 01:24:13,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:13,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-04-15 01:24:13,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:24:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 01:24:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:15,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:15,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-04-15 01:24:15,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272248503] [2021-04-15 01:24:15,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-04-15 01:24:15,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-04-15 01:24:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 01:24:15,076 INFO L87 Difference]: Start difference. First operand 34234 states and 68430 transitions. Second operand has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:24:16,713 INFO L93 Difference]: Finished difference Result 37554 states and 75070 transitions. [2021-04-15 01:24:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 01:24:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-04-15 01:24:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:24:16,742 INFO L225 Difference]: With dead ends: 37554 [2021-04-15 01:24:16,743 INFO L226 Difference]: Without dead ends: 37554 [2021-04-15 01:24:16,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2194.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 01:24:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-04-15 01:24:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 36060. [2021-04-15 01:24:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36060 states, 36059 states have (on average 1.9990016362073268) internal successors, (72082), 36059 states have internal predecessors, (72082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36060 states to 36060 states and 72082 transitions. [2021-04-15 01:24:17,071 INFO L78 Accepts]: Start accepts. Automaton has 36060 states and 72082 transitions. Word has length 408 [2021-04-15 01:24:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:24:17,071 INFO L480 AbstractCegarLoop]: Abstraction has 36060 states and 72082 transitions. [2021-04-15 01:24:17,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 6.512195121951219) internal successors, (267), 41 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36060 states and 72082 transitions. [2021-04-15 01:24:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-04-15 01:24:17,103 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:24:17,103 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:24:17,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 01:24:17,304 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:24:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:24:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 664957910, now seen corresponding path program 31 times [2021-04-15 01:24:17,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:24:17,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035092534] [2021-04-15 01:24:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:24:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035092534] [2021-04-15 01:24:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917668324] [2021-04-15 01:24:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 01:24:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-04-15 01:24:20,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:20,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-04-15 01:24:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711569712] [2021-04-15 01:24:20,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-04-15 01:24:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-04-15 01:24:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 01:24:20,152 INFO L87 Difference]: Start difference. First operand 36060 states and 72082 transitions. Second operand has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:24:21,948 INFO L93 Difference]: Finished difference Result 37886 states and 75734 transitions. [2021-04-15 01:24:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-04-15 01:24:21,950 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-04-15 01:24:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:24:21,979 INFO L225 Difference]: With dead ends: 37886 [2021-04-15 01:24:21,979 INFO L226 Difference]: Without dead ends: 37886 [2021-04-15 01:24:21,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2480.1ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 01:24:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37886 states. [2021-04-15 01:24:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37886 to 37886. [2021-04-15 01:24:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37886 states, 37885 states have (on average 1.9990497558400422) internal successors, (75734), 37885 states have internal predecessors, (75734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37886 states to 37886 states and 75734 transitions. [2021-04-15 01:24:22,330 INFO L78 Accepts]: Start accepts. Automaton has 37886 states and 75734 transitions. Word has length 419 [2021-04-15 01:24:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:24:22,330 INFO L480 AbstractCegarLoop]: Abstraction has 37886 states and 75734 transitions. [2021-04-15 01:24:22,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 6.465116279069767) internal successors, (278), 43 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:24:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 37886 states and 75734 transitions. [2021-04-15 01:24:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:24:22,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:24:22,362 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:24:22,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 01:24:22,562 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:24:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:24:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1270816298, now seen corresponding path program 32 times [2021-04-15 01:24:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:24:22,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597674619] [2021-04-15 01:24:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:24:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:24:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:24:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597674619] [2021-04-15 01:24:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889162373] [2021-04-15 01:24:27,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 01:24:27,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:24:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:24:27,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-04-15 01:24:27,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:24:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:24:30,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:24:30,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2021-04-15 01:24:30,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561500580] [2021-04-15 01:24:30,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-04-15 01:24:30,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:24:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-04-15 01:24:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 01:24:30,121 INFO L87 Difference]: Start difference. First operand 37886 states and 75734 transitions. Second operand has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:25:52,302 INFO L93 Difference]: Finished difference Result 239823 states and 479594 transitions. [2021-04-15 01:25:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-04-15 01:25:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:25:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:25:52,581 INFO L225 Difference]: With dead ends: 239823 [2021-04-15 01:25:52,581 INFO L226 Difference]: Without dead ends: 239811 [2021-04-15 01:25:52,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32379 ImplicationChecksByTransitivity, 21298.0ms TimeCoverageRelationStatistics Valid=1156, Invalid=101564, Unknown=0, NotChecked=0, Total=102720 [2021-04-15 01:25:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239811 states. [2021-04-15 01:25:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239811 to 39725. [2021-04-15 01:25:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39725 states, 39724 states have (on average 2.004506092035042) internal successors, (79627), 39724 states have internal predecessors, (79627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39725 states to 39725 states and 79627 transitions. [2021-04-15 01:25:53,934 INFO L78 Accepts]: Start accepts. Automaton has 39725 states and 79627 transitions. Word has length 430 [2021-04-15 01:25:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:25:53,934 INFO L480 AbstractCegarLoop]: Abstraction has 39725 states and 79627 transitions. [2021-04-15 01:25:53,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 6.382352941176471) internal successors, (434), 68 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39725 states and 79627 transitions. [2021-04-15 01:25:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:25:53,968 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:25:53,969 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:25:54,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 01:25:54,169 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:25:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:25:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -372865164, now seen corresponding path program 33 times [2021-04-15 01:25:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:25:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485739895] [2021-04-15 01:25:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:25:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:25:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2021-04-15 01:25:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485739895] [2021-04-15 01:25:54,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 01:25:54,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 01:25:54,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172939196] [2021-04-15 01:25:54,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 01:25:54,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:25:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 01:25:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:25:54,228 INFO L87 Difference]: Start difference. First operand 39725 states and 79627 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:25:54,309 INFO L93 Difference]: Finished difference Result 32064 states and 60540 transitions. [2021-04-15 01:25:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 01:25:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:25:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:25:54,341 INFO L225 Difference]: With dead ends: 32064 [2021-04-15 01:25:54,341 INFO L226 Difference]: Without dead ends: 32064 [2021-04-15 01:25:54,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 01:25:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32064 states. [2021-04-15 01:25:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32064 to 31640. [2021-04-15 01:25:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31640 states, 31639 states have (on average 1.8917475267865609) internal successors, (59853), 31639 states have internal predecessors, (59853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31640 states to 31640 states and 59853 transitions. [2021-04-15 01:25:54,639 INFO L78 Accepts]: Start accepts. Automaton has 31640 states and 59853 transitions. Word has length 430 [2021-04-15 01:25:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:25:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 31640 states and 59853 transitions. [2021-04-15 01:25:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:25:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31640 states and 59853 transitions. [2021-04-15 01:25:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:25:54,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:25:54,669 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:25:54,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-04-15 01:25:54,669 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:25:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:25:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -819169538, now seen corresponding path program 34 times [2021-04-15 01:25:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:25:54,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010463329] [2021-04-15 01:25:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:25:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:25:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:25:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010463329] [2021-04-15 01:25:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270569751] [2021-04-15 01:25:59,724 INFO L93 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 [2021-04-15 01:25:59,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 01:25:59,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:25:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 165 conjunts are in the unsatisfiable core [2021-04-15 01:25:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:26:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:26:02,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:26:02,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-04-15 01:26:02,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124340971] [2021-04-15 01:26:02,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-04-15 01:26:02,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:26:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-04-15 01:26:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 01:26:02,620 INFO L87 Difference]: Start difference. First operand 31640 states and 59853 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:27:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:27:02,380 INFO L93 Difference]: Finished difference Result 166472 states and 318652 transitions. [2021-04-15 01:27:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-04-15 01:27:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:27:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:27:02,540 INFO L225 Difference]: With dead ends: 166472 [2021-04-15 01:27:02,540 INFO L226 Difference]: Without dead ends: 166448 [2021-04-15 01:27:02,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33399 ImplicationChecksByTransitivity, 22552.5ms TimeCoverageRelationStatistics Valid=1183, Invalid=104767, Unknown=0, NotChecked=0, Total=105950 [2021-04-15 01:27:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166448 states. [2021-04-15 01:27:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166448 to 33008. [2021-04-15 01:27:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33008 states, 33007 states have (on average 1.8911140061199139) internal successors, (62420), 33007 states have internal predecessors, (62420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:27:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33008 states to 33008 states and 62420 transitions. [2021-04-15 01:27:03,530 INFO L78 Accepts]: Start accepts. Automaton has 33008 states and 62420 transitions. Word has length 430 [2021-04-15 01:27:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:27:03,531 INFO L480 AbstractCegarLoop]: Abstraction has 33008 states and 62420 transitions. [2021-04-15 01:27:03,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:27:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 33008 states and 62420 transitions. [2021-04-15 01:27:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:27:03,561 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:27:03,561 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:27:03,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 01:27:03,761 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:27:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:27:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 154289706, now seen corresponding path program 35 times [2021-04-15 01:27:03,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:27:03,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072520699] [2021-04-15 01:27:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:27:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:27:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:27:08,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072520699] [2021-04-15 01:27:08,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227343330] [2021-04-15 01:27:08,994 INFO L93 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 [2021-04-15 01:27:09,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-04-15 01:27:09,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:27:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-04-15 01:27:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:27:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:27:11,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:27:11,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-04-15 01:27:11,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187479872] [2021-04-15 01:27:11,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-04-15 01:27:11,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:27:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-04-15 01:27:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 01:27:11,738 INFO L87 Difference]: Start difference. First operand 33008 states and 62420 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:28:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:28:11,445 INFO L93 Difference]: Finished difference Result 151887 states and 290614 transitions. [2021-04-15 01:28:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2021-04-15 01:28:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:28:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:28:11,613 INFO L225 Difference]: With dead ends: 151887 [2021-04-15 01:28:11,613 INFO L226 Difference]: Without dead ends: 151875 [2021-04-15 01:28:11,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28197 ImplicationChecksByTransitivity, 22419.3ms TimeCoverageRelationStatistics Valid=1090, Invalid=91630, Unknown=0, NotChecked=0, Total=92720 [2021-04-15 01:28:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151875 states. [2021-04-15 01:28:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151875 to 33073. [2021-04-15 01:28:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 1.8912373004354137) internal successors, (62547), 33072 states have internal predecessors, (62547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:28:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 62547 transitions. [2021-04-15 01:28:12,439 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 62547 transitions. Word has length 430 [2021-04-15 01:28:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:28:12,439 INFO L480 AbstractCegarLoop]: Abstraction has 33073 states and 62547 transitions. [2021-04-15 01:28:12,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:28:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 62547 transitions. [2021-04-15 01:28:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:28:12,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:28:12,469 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:28:12,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 01:28:12,670 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:28:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:28:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -347343932, now seen corresponding path program 36 times [2021-04-15 01:28:12,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:28:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197164987] [2021-04-15 01:28:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:28:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:28:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:28:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197164987] [2021-04-15 01:28:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127724923] [2021-04-15 01:28:18,240 INFO L93 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 [2021-04-15 01:28:18,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-04-15 01:28:18,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:28:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 170 conjunts are in the unsatisfiable core [2021-04-15 01:28:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:28:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:28:21,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:28:21,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-04-15 01:28:21,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437769255] [2021-04-15 01:28:21,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-04-15 01:28:21,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:28:21,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-04-15 01:28:21,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 01:28:21,317 INFO L87 Difference]: Start difference. First operand 33073 states and 62547 transitions. Second operand has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:29:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:29:34,576 INFO L93 Difference]: Finished difference Result 185587 states and 355431 transitions. [2021-04-15 01:29:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 347 states. [2021-04-15 01:29:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:29:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:29:34,750 INFO L225 Difference]: With dead ends: 185587 [2021-04-15 01:29:34,750 INFO L226 Difference]: Without dead ends: 185551 [2021-04-15 01:29:34,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40168 ImplicationChecksByTransitivity, 26994.0ms TimeCoverageRelationStatistics Valid=1294, Invalid=122258, Unknown=0, NotChecked=0, Total=123552 [2021-04-15 01:29:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185551 states. [2021-04-15 01:29:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185551 to 34370. [2021-04-15 01:29:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 1.8906863743489772) internal successors, (64981), 34369 states have internal predecessors, (64981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:29:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 64981 transitions. [2021-04-15 01:29:35,914 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 64981 transitions. Word has length 430 [2021-04-15 01:29:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:29:35,914 INFO L480 AbstractCegarLoop]: Abstraction has 34370 states and 64981 transitions. [2021-04-15 01:29:35,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:29:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 64981 transitions. [2021-04-15 01:29:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:29:35,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:29:35,947 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:29:36,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-04-15 01:29:36,148 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:29:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:29:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1069295958, now seen corresponding path program 37 times [2021-04-15 01:29:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:29:36,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877459761] [2021-04-15 01:29:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:29:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:29:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:29:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877459761] [2021-04-15 01:29:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258673927] [2021-04-15 01:29:41,998 INFO L93 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 [2021-04-15 01:29:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:29:42,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-04-15 01:29:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:29:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:29:45,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:29:45,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-04-15 01:29:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924733081] [2021-04-15 01:29:45,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-04-15 01:29:45,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:29:45,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-04-15 01:29:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 01:29:45,166 INFO L87 Difference]: Start difference. First operand 34370 states and 64981 transitions. Second operand has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:30:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 01:30:51,611 INFO L93 Difference]: Finished difference Result 153314 states and 293297 transitions. [2021-04-15 01:30:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-04-15 01:30:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 430 [2021-04-15 01:30:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 01:30:51,755 INFO L225 Difference]: With dead ends: 153314 [2021-04-15 01:30:51,755 INFO L226 Difference]: Without dead ends: 153302 [2021-04-15 01:30:51,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 445 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28435 ImplicationChecksByTransitivity, 24823.8ms TimeCoverageRelationStatistics Valid=1094, Invalid=92236, Unknown=0, NotChecked=0, Total=93330 [2021-04-15 01:30:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153302 states. [2021-04-15 01:30:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153302 to 34475. [2021-04-15 01:30:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34475 states, 34474 states have (on average 1.8908452746997737) internal successors, (65185), 34474 states have internal predecessors, (65185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:30:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34475 states to 34475 states and 65185 transitions. [2021-04-15 01:30:52,746 INFO L78 Accepts]: Start accepts. Automaton has 34475 states and 65185 transitions. Word has length 430 [2021-04-15 01:30:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 01:30:52,747 INFO L480 AbstractCegarLoop]: Abstraction has 34475 states and 65185 transitions. [2021-04-15 01:30:52,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 6.2898550724637685) internal successors, (434), 69 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 01:30:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 34475 states and 65185 transitions. [2021-04-15 01:30:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-04-15 01:30:52,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 01:30:52,775 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 01:30:52,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-04-15 01:30:52,976 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 01:30:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 01:30:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 567662320, now seen corresponding path program 38 times [2021-04-15 01:30:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 01:30:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870704190] [2021-04-15 01:30:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 01:30:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 01:30:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:30:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870704190] [2021-04-15 01:30:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146851882] [2021-04-15 01:30:58,972 INFO L93 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 [2021-04-15 01:30:59,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 01:30:59,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 01:30:59,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 168 conjunts are in the unsatisfiable core [2021-04-15 01:30:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 01:30:59,793 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-04-15 01:31:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 01:31:02,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 01:31:02,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-04-15 01:31:02,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739428626] [2021-04-15 01:31:02,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-04-15 01:31:02,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 01:31:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-04-15 01:31:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 01:31:02,201 INFO L87 Difference]: Start difference. First operand 34475 states and 65185 transitions. Second operand has 70 states, 70 states have (on average 6.2) internal successors, (434), 70 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 01:32:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-04-15 01:32:09,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 01:32:09,678 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 01:32:09,681 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 01:32:09,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 01:32:09 BasicIcfg [2021-04-15 01:32:09,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 01:32:09,682 INFO L168 Benchmark]: Toolchain (without parser) took 784276.61 ms. Allocated memory was 255.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 236.5 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 638.9 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.93 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 236.0 MB in the beginning and 315.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.98 ms. Allocated memory is still 350.2 MB. Free memory was 315.6 MB in the beginning and 313.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: Boogie Preprocessor took 24.56 ms. Allocated memory is still 350.2 MB. Free memory was 313.2 MB in the beginning and 311.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: RCFGBuilder took 304.74 ms. Allocated memory is still 350.2 MB. Free memory was 311.5 MB in the beginning and 285.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L168 Benchmark]: TraceAbstraction took 783289.18 ms. Allocated memory was 350.2 MB in the beginning and 2.2 GB in the end (delta: 1.8 GB). Free memory was 285.9 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 594.9 MB. Max. memory is 16.0 GB. [2021-04-15 01:32:09,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 607.93 ms. Allocated memory was 255.9 MB in the beginning and 350.2 MB in the end (delta: 94.4 MB). Free memory was 236.0 MB in the beginning and 315.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 44.98 ms. Allocated memory is still 350.2 MB. Free memory was 315.6 MB in the beginning and 313.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.56 ms. Allocated memory is still 350.2 MB. Free memory was 313.2 MB in the beginning and 311.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 304.74 ms. Allocated memory is still 350.2 MB. Free memory was 311.5 MB in the beginning and 285.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 783289.18 ms. Allocated memory was 350.2 MB in the beginning and 2.2 GB in the end (delta: 1.8 GB). Free memory was 285.9 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 594.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable (line 13). Cancelled while BasicCegarLoop was constructing difference of abstraction (34475states) and FLOYD_HOARE automaton (currently 280 states, 70 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 307 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 783222.4ms, OverallIterations: 41, TraceHistogramMax: 20, EmptinessCheckTime: 702.5ms, AutomataDifference: 672008.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29303 SDtfs, 121667 SDslu, 1678642 SDs, 0 SdLazy, 271916 SolverSat, 7451 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120353.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21367 GetRequests, 14341 SyntacticMatches, 12 SemanticMatches, 7013 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930735 ImplicationChecksByTransitivity, 401502.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39725occurred in iteration=35, InterpolantAutomatonStates: 6331, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10314.2ms AutomataMinimizationTime, 40 MinimizatonAttempts, 751938 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 891.4ms SsaConstructionTime, 4449.3ms SatisfiabilityAnalysisTime, 84971.7ms InterpolantComputationTime, 21154 NumberOfCodeBlocks, 20844 NumberOfCodeBlocksAsserted, 310 NumberOfCheckSat, 21075 ConstructedInterpolants, 0 QuantifiedInterpolants, 62455 SizeOfPredicates, 875 NumberOfNonLiveVariables, 20511 ConjunctsInSsa, 1693 ConjunctsInUnsatCore, 79 InterpolantComputations, 4 PerfectInterpolantSequences, 47447/131262 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