/usr/bin/java -Xmx8000000000 -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/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:19:01,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:19:01,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:19:01,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:19:01,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:19:01,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:19:01,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:19:01,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:19:01,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:19:01,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:19:01,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:19:01,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:19:01,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:19:01,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:19:01,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:19:01,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:19:01,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:19:01,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:19:01,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:19:01,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:19:01,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:19:01,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:19:01,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:19:01,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:19:01,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:19:01,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:19:01,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:19:01,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:19:01,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:19:01,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:19:01,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:19:01,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:19:01,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:19:01,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:19:01,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:19:01,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:19:01,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:19:01,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:19:01,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:19:01,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:19:01,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:19:01,288 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 [2021-07-09 16:19:01,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:19:01,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:19:01,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:19:01,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:19:01,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:19:01,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:19:01,318 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:19:01,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:19:01,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:19:01,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:19:01,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:19:01,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:19:01,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:19:01,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:19:01,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:19:01,321 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:19:01,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:19:01,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:19:01,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:19:01,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:19:01,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:19:01,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:19:01,627 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:19:01,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2021-07-09 16:19:01,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0391f470a/ef4b8c8ec155453a810601783c843cb4/FLAG0fb96a288 [2021-07-09 16:19:02,077 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:19:02,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2021-07-09 16:19:02,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0391f470a/ef4b8c8ec155453a810601783c843cb4/FLAG0fb96a288 [2021-07-09 16:19:02,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0391f470a/ef4b8c8ec155453a810601783c843cb4 [2021-07-09 16:19:02,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:19:02,419 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:19:02,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:19:02,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:19:02,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:19:02,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2927a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02, skipping insertion in model container [2021-07-09 16:19:02,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:19:02,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:19:02,770 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-07-09 16:19:02,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:19:02,809 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:19:02,855 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2021-07-09 16:19:02,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:19:02,916 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:19:02,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02 WrapperNode [2021-07-09 16:19:02,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:19:02,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:19:02,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:19:02,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:19:02,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:19:02,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:19:02,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:19:02,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:19:02,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:02,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:03,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:03,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:03,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (1/1) ... [2021-07-09 16:19:03,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:19:03,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:19:03,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:19:03,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:19:03,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (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 [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:19:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:19:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-09 16:19:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:19:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:19:03,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:19:03,101 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:19:03,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:19:03,476 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-07-09 16:19:03,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:19:03 BoogieIcfgContainer [2021-07-09 16:19:03,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:19:03,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:19:03,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:19:03,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:19:03,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:19:02" (1/3) ... [2021-07-09 16:19:03,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acbae4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:19:03, skipping insertion in model container [2021-07-09 16:19:03,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:02" (2/3) ... [2021-07-09 16:19:03,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acbae4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:19:03, skipping insertion in model container [2021-07-09 16:19:03,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:19:03" (3/3) ... [2021-07-09 16:19:03,482 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2021-07-09 16:19:03,486 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:19:03,486 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:19:03,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-09 16:19:03,486 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:19:03,515 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,515 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,515 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,515 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,515 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,520 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,522 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,523 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,525 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,526 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,532 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,532 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,532 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,532 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,532 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,533 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,534 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,539 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,540 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,541 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,544 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,545 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,549 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,557 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:03,569 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 16:19:03,587 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:19:03,604 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:19:03,604 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:19:03,604 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:19:03,605 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:19:03,605 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:19:03,605 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:19:03,605 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:19:03,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-09 16:19:03,616 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-09 16:19:03,865 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 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) [2021-07-09 16:19:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 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) [2021-07-09 16:19:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 16:19:03,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:03,918 INFO L508 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] [2021-07-09 16:19:03,918 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash -58151633, now seen corresponding path program 1 times [2021-07-09 16:19:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:03,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411254260] [2021-07-09 16:19:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:04,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411254260] [2021-07-09 16:19:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411254260] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:04,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:19:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240863819] [2021-07-09 16:19:04,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:19:04,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:04,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:19:04,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:04,273 INFO L87 Difference]: Start difference. First operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 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 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-07-09 16:19:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:04,462 INFO L93 Difference]: Finished difference Result 13194 states and 36538 transitions. [2021-07-09 16:19:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:19:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-07-09 16:19:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:04,543 INFO L225 Difference]: With dead ends: 13194 [2021-07-09 16:19:04,543 INFO L226 Difference]: Without dead ends: 12844 [2021-07-09 16:19:04,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-07-09 16:19:04,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 11431. [2021-07-09 16:19:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 11429 states have (on average 2.7715460670224865) internal successors, (31676), 11430 states have internal predecessors, (31676), 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) [2021-07-09 16:19:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 31676 transitions. [2021-07-09 16:19:04,995 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 31676 transitions. Word has length 54 [2021-07-09 16:19:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:04,996 INFO L482 AbstractCegarLoop]: Abstraction has 11431 states and 31676 transitions. [2021-07-09 16:19:04,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-07-09 16:19:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 31676 transitions. [2021-07-09 16:19:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 16:19:05,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:05,009 INFO L508 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] [2021-07-09 16:19:05,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:19:05,011 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1737064523, now seen corresponding path program 1 times [2021-07-09 16:19:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532260118] [2021-07-09 16:19:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:05,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532260118] [2021-07-09 16:19:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532260118] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:05,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:05,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 16:19:05,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701443704] [2021-07-09 16:19:05,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 16:19:05,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 16:19:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 16:19:05,169 INFO L87 Difference]: Start difference. First operand 11431 states and 31676 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-07-09 16:19:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:05,323 INFO L93 Difference]: Finished difference Result 15291 states and 42316 transitions. [2021-07-09 16:19:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 16:19:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-07-09 16:19:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:05,379 INFO L225 Difference]: With dead ends: 15291 [2021-07-09 16:19:05,379 INFO L226 Difference]: Without dead ends: 15291 [2021-07-09 16:19:05,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 16:19:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-07-09 16:19:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 12010. [2021-07-09 16:19:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12010 states, 12008 states have (on average 2.770819453697535) internal successors, (33272), 12009 states have internal predecessors, (33272), 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) [2021-07-09 16:19:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12010 states to 12010 states and 33272 transitions. [2021-07-09 16:19:05,767 INFO L78 Accepts]: Start accepts. Automaton has 12010 states and 33272 transitions. Word has length 63 [2021-07-09 16:19:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:05,767 INFO L482 AbstractCegarLoop]: Abstraction has 12010 states and 33272 transitions. [2021-07-09 16:19:05,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-07-09 16:19:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 12010 states and 33272 transitions. [2021-07-09 16:19:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 16:19:05,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:05,783 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:05,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:19:05,783 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1279495094, now seen corresponding path program 1 times [2021-07-09 16:19:05,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:05,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659787533] [2021-07-09 16:19:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:05,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:05,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659787533] [2021-07-09 16:19:05,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659787533] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:05,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:05,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:19:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039279874] [2021-07-09 16:19:05,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:19:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:19:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:05,879 INFO L87 Difference]: Start difference. First operand 12010 states and 33272 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-07-09 16:19:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:05,934 INFO L93 Difference]: Finished difference Result 5338 states and 13928 transitions. [2021-07-09 16:19:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:19:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 80 [2021-07-09 16:19:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:05,947 INFO L225 Difference]: With dead ends: 5338 [2021-07-09 16:19:05,947 INFO L226 Difference]: Without dead ends: 5158 [2021-07-09 16:19:05,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-07-09 16:19:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5062. [2021-07-09 16:19:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5060 states have (on average 2.6104743083003954) internal successors, (13209), 5061 states have internal predecessors, (13209), 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) [2021-07-09 16:19:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 13209 transitions. [2021-07-09 16:19:06,116 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 13209 transitions. Word has length 80 [2021-07-09 16:19:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:06,117 INFO L482 AbstractCegarLoop]: Abstraction has 5062 states and 13209 transitions. [2021-07-09 16:19:06,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-07-09 16:19:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 13209 transitions. [2021-07-09 16:19:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-09 16:19:06,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:06,126 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:06,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:19:06,126 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1751726349, now seen corresponding path program 1 times [2021-07-09 16:19:06,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:06,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732913289] [2021-07-09 16:19:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:06,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:06,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732913289] [2021-07-09 16:19:06,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732913289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:06,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67815082] [2021-07-09 16:19:06,204 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 [2021-07-09 16:19:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:19:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67815082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:06,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:06,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 16:19:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199267189] [2021-07-09 16:19:06,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:19:06,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:19:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:19:06,586 INFO L87 Difference]: Start difference. First operand 5062 states and 13209 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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) [2021-07-09 16:19:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:06,668 INFO L93 Difference]: Finished difference Result 7950 states and 20630 transitions. [2021-07-09 16:19:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 16:19:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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 89 [2021-07-09 16:19:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:06,744 INFO L225 Difference]: With dead ends: 7950 [2021-07-09 16:19:06,744 INFO L226 Difference]: Without dead ends: 7950 [2021-07-09 16:19:06,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:19:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-07-09 16:19:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7297. [2021-07-09 16:19:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7295 states have (on average 2.599451679232351) internal successors, (18963), 7296 states have internal predecessors, (18963), 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) [2021-07-09 16:19:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 18963 transitions. [2021-07-09 16:19:06,907 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 18963 transitions. Word has length 89 [2021-07-09 16:19:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:06,907 INFO L482 AbstractCegarLoop]: Abstraction has 7297 states and 18963 transitions. [2021-07-09 16:19:06,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 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) [2021-07-09 16:19:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 18963 transitions. [2021-07-09 16:19:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-09 16:19:06,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:06,917 INFO L508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:07,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:07,135 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1590476080, now seen corresponding path program 1 times [2021-07-09 16:19:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:07,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545972076] [2021-07-09 16:19:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:07,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545972076] [2021-07-09 16:19:07,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545972076] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:07,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:07,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 16:19:07,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902014281] [2021-07-09 16:19:07,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 16:19:07,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:07,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 16:19:07,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 16:19:07,177 INFO L87 Difference]: Start difference. First operand 7297 states and 18963 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-07-09 16:19:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:07,253 INFO L93 Difference]: Finished difference Result 10552 states and 27328 transitions. [2021-07-09 16:19:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 16:19:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 94 [2021-07-09 16:19:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:07,362 INFO L225 Difference]: With dead ends: 10552 [2021-07-09 16:19:07,362 INFO L226 Difference]: Without dead ends: 10552 [2021-07-09 16:19:07,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:19:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-07-09 16:19:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 6645. [2021-07-09 16:19:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6643 states have (on average 2.577600481710071) internal successors, (17123), 6644 states have internal predecessors, (17123), 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) [2021-07-09 16:19:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 17123 transitions. [2021-07-09 16:19:07,473 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 17123 transitions. Word has length 94 [2021-07-09 16:19:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:07,473 INFO L482 AbstractCegarLoop]: Abstraction has 6645 states and 17123 transitions. [2021-07-09 16:19:07,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-07-09 16:19:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 17123 transitions. [2021-07-09 16:19:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-07-09 16:19:07,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:07,485 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:07,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 16:19:07,485 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261201, now seen corresponding path program 2 times [2021-07-09 16:19:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:07,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628353537] [2021-07-09 16:19:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:07,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:07,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628353537] [2021-07-09 16:19:07,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628353537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:07,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046658699] [2021-07-09 16:19:07,551 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 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 [2021-07-09 16:19:07,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:07,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:19:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:07,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046658699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:07,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:07,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 16:19:07,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27233070] [2021-07-09 16:19:07,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 16:19:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 16:19:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:19:07,935 INFO L87 Difference]: Start difference. First operand 6645 states and 17123 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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) [2021-07-09 16:19:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:08,030 INFO L93 Difference]: Finished difference Result 9517 states and 24500 transitions. [2021-07-09 16:19:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:19:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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 124 [2021-07-09 16:19:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:08,057 INFO L225 Difference]: With dead ends: 9517 [2021-07-09 16:19:08,057 INFO L226 Difference]: Without dead ends: 9517 [2021-07-09 16:19:08,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2021-07-09 16:19:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8880. [2021-07-09 16:19:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8878 states have (on average 2.576819103401667) internal successors, (22877), 8879 states have internal predecessors, (22877), 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) [2021-07-09 16:19:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 22877 transitions. [2021-07-09 16:19:08,228 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 22877 transitions. Word has length 124 [2021-07-09 16:19:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:08,228 INFO L482 AbstractCegarLoop]: Abstraction has 8880 states and 22877 transitions. [2021-07-09 16:19:08,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 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) [2021-07-09 16:19:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 22877 transitions. [2021-07-09 16:19:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-07-09 16:19:08,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:08,247 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:08,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:08,462 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1136649656, now seen corresponding path program 1 times [2021-07-09 16:19:08,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:08,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69172775] [2021-07-09 16:19:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:08,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:08,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69172775] [2021-07-09 16:19:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69172775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:08,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255945647] [2021-07-09 16:19:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 16:19:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:19:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:08,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255945647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:08,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:08,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 16:19:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482093508] [2021-07-09 16:19:08,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:19:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:19:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:19:08,883 INFO L87 Difference]: Start difference. First operand 8880 states and 22877 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2021-07-09 16:19:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:08,995 INFO L93 Difference]: Finished difference Result 12150 states and 31382 transitions. [2021-07-09 16:19:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:19:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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 129 [2021-07-09 16:19:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:09,015 INFO L225 Difference]: With dead ends: 12150 [2021-07-09 16:19:09,015 INFO L226 Difference]: Without dead ends: 12150 [2021-07-09 16:19:09,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-07-09 16:19:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10700. [2021-07-09 16:19:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10698 states have (on average 2.598429613011778) internal successors, (27798), 10699 states have internal predecessors, (27798), 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) [2021-07-09 16:19:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 27798 transitions. [2021-07-09 16:19:09,201 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 27798 transitions. Word has length 129 [2021-07-09 16:19:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 27798 transitions. [2021-07-09 16:19:09,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2021-07-09 16:19:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 27798 transitions. [2021-07-09 16:19:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-07-09 16:19:09,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:09,219 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-07-09 16:19:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:09,435 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1360096717, now seen corresponding path program 3 times [2021-07-09 16:19:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:09,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535055465] [2021-07-09 16:19:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:09,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535055465] [2021-07-09 16:19:09,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535055465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063613736] [2021-07-09 16:19:09,518 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 [2021-07-09 16:19:09,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:19:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:19:09,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:09,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063613736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:09,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:09,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 16:19:09,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156800249] [2021-07-09 16:19:09,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:19:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:19:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:19:09,924 INFO L87 Difference]: Start difference. First operand 10700 states and 27798 transitions. Second operand has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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) [2021-07-09 16:19:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:10,049 INFO L93 Difference]: Finished difference Result 14707 states and 37949 transitions. [2021-07-09 16:19:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:19:10,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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 159 [2021-07-09 16:19:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:10,072 INFO L225 Difference]: With dead ends: 14707 [2021-07-09 16:19:10,072 INFO L226 Difference]: Without dead ends: 14707 [2021-07-09 16:19:10,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:19:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-07-09 16:19:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 12935. [2021-07-09 16:19:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 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) [2021-07-09 16:19:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-09 16:19:10,306 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 159 [2021-07-09 16:19:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:10,306 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-09 16:19:10,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 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) [2021-07-09 16:19:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-09 16:19:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-07-09 16:19:10,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:10,324 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:10,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:10,542 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -72462384, now seen corresponding path program 2 times [2021-07-09 16:19:10,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:10,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030453699] [2021-07-09 16:19:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:10,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030453699] [2021-07-09 16:19:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030453699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563708504] [2021-07-09 16:19:10,623 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 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 [2021-07-09 16:19:10,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:10,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:19:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:11,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563708504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:11,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:11,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:19:11,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818437467] [2021-07-09 16:19:11,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:19:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:19:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:19:11,135 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2021-07-09 16:19:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:11,309 INFO L93 Difference]: Finished difference Result 17340 states and 44831 transitions. [2021-07-09 16:19:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:19:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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 164 [2021-07-09 16:19:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:11,334 INFO L225 Difference]: With dead ends: 17340 [2021-07-09 16:19:11,335 INFO L226 Difference]: Without dead ends: 17340 [2021-07-09 16:19:11,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2021-07-09 16:19:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 12935. [2021-07-09 16:19:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 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) [2021-07-09 16:19:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-09 16:19:11,538 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 164 [2021-07-09 16:19:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:11,539 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-09 16:19:11,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2021-07-09 16:19:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-09 16:19:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-07-09 16:19:11,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:11,557 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-07-09 16:19:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:11,773 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1339210833, now seen corresponding path program 4 times [2021-07-09 16:19:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747603451] [2021-07-09 16:19:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:11,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747603451] [2021-07-09 16:19:11,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747603451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527956986] [2021-07-09 16:19:11,876 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 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 [2021-07-09 16:19:12,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:19:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:12,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527956986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:12,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:12,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:19:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507451758] [2021-07-09 16:19:12,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:19:12,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:19:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:12,268 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2021-07-09 16:19:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:12,446 INFO L93 Difference]: Finished difference Result 17022 states and 43907 transitions. [2021-07-09 16:19:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:19:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 194 [2021-07-09 16:19:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:12,474 INFO L225 Difference]: With dead ends: 17022 [2021-07-09 16:19:12,474 INFO L226 Difference]: Without dead ends: 17022 [2021-07-09 16:19:12,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:19:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-07-09 16:19:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 15170. [2021-07-09 16:19:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15170 states, 15168 states have (on average 2.591376582278481) internal successors, (39306), 15169 states have internal predecessors, (39306), 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) [2021-07-09 16:19:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15170 states to 15170 states and 39306 transitions. [2021-07-09 16:19:13,125 INFO L78 Accepts]: Start accepts. Automaton has 15170 states and 39306 transitions. Word has length 194 [2021-07-09 16:19:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:13,126 INFO L482 AbstractCegarLoop]: Abstraction has 15170 states and 39306 transitions. [2021-07-09 16:19:13,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2021-07-09 16:19:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 15170 states and 39306 transitions. [2021-07-09 16:19:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-09 16:19:13,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:13,165 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:13,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:13,365 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1841425736, now seen corresponding path program 3 times [2021-07-09 16:19:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:13,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844144777] [2021-07-09 16:19:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:13,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844144777] [2021-07-09 16:19:13,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844144777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851340669] [2021-07-09 16:19:13,453 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 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 [2021-07-09 16:19:13,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:19:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:13,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:19:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-07-09 16:19:13,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851340669] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:13,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:19:13,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-07-09 16:19:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065546732] [2021-07-09 16:19:13,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:19:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:19:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:13,787 INFO L87 Difference]: Start difference. First operand 15170 states and 39306 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-07-09 16:19:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:13,933 INFO L93 Difference]: Finished difference Result 19600 states and 50777 transitions. [2021-07-09 16:19:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 16:19:13,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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 199 [2021-07-09 16:19:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:13,967 INFO L225 Difference]: With dead ends: 19600 [2021-07-09 16:19:13,967 INFO L226 Difference]: Without dead ends: 19600 [2021-07-09 16:19:13,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:19:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19600 states. [2021-07-09 16:19:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19600 to 16390. [2021-07-09 16:19:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16390 states, 16388 states have (on average 2.5980595557725166) internal successors, (42577), 16389 states have internal predecessors, (42577), 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) [2021-07-09 16:19:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 42577 transitions. [2021-07-09 16:19:14,283 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 42577 transitions. Word has length 199 [2021-07-09 16:19:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:14,283 INFO L482 AbstractCegarLoop]: Abstraction has 16390 states and 42577 transitions. [2021-07-09 16:19:14,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-07-09 16:19:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 42577 transitions. [2021-07-09 16:19:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-09 16:19:14,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:14,306 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:14,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:14,523 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash 384712, now seen corresponding path program 4 times [2021-07-09 16:19:14,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:14,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597552297] [2021-07-09 16:19:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:19:14,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597552297] [2021-07-09 16:19:14,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597552297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:14,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070670606] [2021-07-09 16:19:14,640 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 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 [2021-07-09 16:19:14,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:19:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:15,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070670606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:15,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:15,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 16:19:15,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567210664] [2021-07-09 16:19:15,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:19:15,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:19:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:19:15,004 INFO L87 Difference]: Start difference. First operand 16390 states and 42577 transitions. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2021-07-09 16:19:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:15,175 INFO L93 Difference]: Finished difference Result 21425 states and 55669 transitions. [2021-07-09 16:19:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 16:19:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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 199 [2021-07-09 16:19:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:15,210 INFO L225 Difference]: With dead ends: 21425 [2021-07-09 16:19:15,211 INFO L226 Difference]: Without dead ends: 21425 [2021-07-09 16:19:15,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states. [2021-07-09 16:19:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21425 to 18210. [2021-07-09 16:19:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18210 states, 18208 states have (on average 2.608633567662566) internal successors, (47498), 18209 states have internal predecessors, (47498), 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) [2021-07-09 16:19:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18210 states to 18210 states and 47498 transitions. [2021-07-09 16:19:15,560 INFO L78 Accepts]: Start accepts. Automaton has 18210 states and 47498 transitions. Word has length 199 [2021-07-09 16:19:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:15,560 INFO L482 AbstractCegarLoop]: Abstraction has 18210 states and 47498 transitions. [2021-07-09 16:19:15,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 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) [2021-07-09 16:19:15,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18210 states and 47498 transitions. [2021-07-09 16:19:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-07-09 16:19:15,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:15,588 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-07-09 16:19:15,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 16:19:15,805 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash 485036685, now seen corresponding path program 5 times [2021-07-09 16:19:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:15,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348130413] [2021-07-09 16:19:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:15,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348130413] [2021-07-09 16:19:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348130413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172701814] [2021-07-09 16:19:15,932 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 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 [2021-07-09 16:19:16,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 16:19:16,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:19:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:16,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172701814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:16,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:16,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:16,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272228526] [2021-07-09 16:19:16,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:16,356 INFO L87 Difference]: Start difference. First operand 18210 states and 47498 transitions. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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) [2021-07-09 16:19:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:16,609 INFO L93 Difference]: Finished difference Result 23982 states and 62236 transitions. [2021-07-09 16:19:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:19:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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 229 [2021-07-09 16:19:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:16,650 INFO L225 Difference]: With dead ends: 23982 [2021-07-09 16:19:16,650 INFO L226 Difference]: Without dead ends: 23982 [2021-07-09 16:19:16,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:19:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23982 states. [2021-07-09 16:19:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23982 to 20445. [2021-07-09 16:19:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20443 states have (on average 2.6049014332534366) internal successors, (53252), 20444 states have internal predecessors, (53252), 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) [2021-07-09 16:19:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 53252 transitions. [2021-07-09 16:19:16,974 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 53252 transitions. Word has length 229 [2021-07-09 16:19:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:16,974 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 53252 transitions. [2021-07-09 16:19:16,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 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) [2021-07-09 16:19:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 53252 transitions. [2021-07-09 16:19:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-07-09 16:19:17,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:17,005 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:17,221 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -958787801, now seen corresponding path program 1 times [2021-07-09 16:19:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071636606] [2021-07-09 16:19:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:17,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071636606] [2021-07-09 16:19:17,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071636606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560639478] [2021-07-09 16:19:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:19:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:17,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560639478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:17,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:17,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:19:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751274052] [2021-07-09 16:19:17,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:19:17,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:17,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:19:17,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:17,744 INFO L87 Difference]: Start difference. First operand 20445 states and 53252 transitions. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2021-07-09 16:19:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:17,964 INFO L93 Difference]: Finished difference Result 31205 states and 80942 transitions. [2021-07-09 16:19:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:19:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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 233 [2021-07-09 16:19:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:18,018 INFO L225 Difference]: With dead ends: 31205 [2021-07-09 16:19:18,018 INFO L226 Difference]: Without dead ends: 31205 [2021-07-09 16:19:18,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:19:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31205 states. [2021-07-09 16:19:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31205 to 19965. [2021-07-09 16:19:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19965 states, 19963 states have (on average 2.602214096077744) internal successors, (51948), 19964 states have internal predecessors, (51948), 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) [2021-07-09 16:19:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19965 states to 19965 states and 51948 transitions. [2021-07-09 16:19:18,440 INFO L78 Accepts]: Start accepts. Automaton has 19965 states and 51948 transitions. Word has length 233 [2021-07-09 16:19:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:18,453 INFO L482 AbstractCegarLoop]: Abstraction has 19965 states and 51948 transitions. [2021-07-09 16:19:18,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2021-07-09 16:19:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19965 states and 51948 transitions. [2021-07-09 16:19:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-07-09 16:19:18,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:18,492 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:18,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:18,709 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1621157676, now seen corresponding path program 5 times [2021-07-09 16:19:18,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:18,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512153331] [2021-07-09 16:19:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 258 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:19:18,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512153331] [2021-07-09 16:19:18,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512153331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954506906] [2021-07-09 16:19:18,817 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 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 [2021-07-09 16:19:18,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:19:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:19:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:19,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954506906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:19,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:19,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-09 16:19:19,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180418644] [2021-07-09 16:19:19,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:19:19,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:19:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:19:19,357 INFO L87 Difference]: Start difference. First operand 19965 states and 51948 transitions. Second operand has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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) [2021-07-09 16:19:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:19,563 INFO L93 Difference]: Finished difference Result 27170 states and 70572 transitions. [2021-07-09 16:19:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:19:19,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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 234 [2021-07-09 16:19:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:19,613 INFO L225 Difference]: With dead ends: 27170 [2021-07-09 16:19:19,614 INFO L226 Difference]: Without dead ends: 27170 [2021-07-09 16:19:19,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:19:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27170 states. [2021-07-09 16:19:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27170 to 22865. [2021-07-09 16:19:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22865 states, 22863 states have (on average 2.6165857499015877) internal successors, (59823), 22864 states have internal predecessors, (59823), 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) [2021-07-09 16:19:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22865 states to 22865 states and 59823 transitions. [2021-07-09 16:19:19,985 INFO L78 Accepts]: Start accepts. Automaton has 22865 states and 59823 transitions. Word has length 234 [2021-07-09 16:19:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:19,985 INFO L482 AbstractCegarLoop]: Abstraction has 22865 states and 59823 transitions. [2021-07-09 16:19:19,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 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) [2021-07-09 16:19:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 22865 states and 59823 transitions. [2021-07-09 16:19:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-07-09 16:19:20,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:20,015 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2021-07-09 16:19:20,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:19:20,232 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash 209544943, now seen corresponding path program 6 times [2021-07-09 16:19:20,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:20,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164759906] [2021-07-09 16:19:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:20,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:20,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164759906] [2021-07-09 16:19:20,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164759906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:20,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776411238] [2021-07-09 16:19:20,394 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 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 [2021-07-09 16:19:20,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:19:20,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:20,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776411238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:20,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:20,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:19:20,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470122500] [2021-07-09 16:19:20,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:19:20,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:19:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:19:20,880 INFO L87 Difference]: Start difference. First operand 22865 states and 59823 transitions. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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) [2021-07-09 16:19:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:21,296 INFO L93 Difference]: Finished difference Result 29242 states and 75990 transitions. [2021-07-09 16:19:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:19:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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 264 [2021-07-09 16:19:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:21,341 INFO L225 Difference]: With dead ends: 29242 [2021-07-09 16:19:21,341 INFO L226 Difference]: Without dead ends: 29242 [2021-07-09 16:19:21,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29242 states. [2021-07-09 16:19:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29242 to 25100. [2021-07-09 16:19:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-07-09 16:19:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-09 16:19:21,736 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 264 [2021-07-09 16:19:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:21,737 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-09 16:19:21,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 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) [2021-07-09 16:19:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-09 16:19:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-07-09 16:19:21,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:21,767 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:21,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:19:21,984 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash 85318831, now seen corresponding path program 2 times [2021-07-09 16:19:21,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:21,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770689039] [2021-07-09 16:19:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:22,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:22,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770689039] [2021-07-09 16:19:22,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770689039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:22,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586278700] [2021-07-09 16:19:22,087 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 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 [2021-07-09 16:19:22,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586278700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:22,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:22,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178354879] [2021-07-09 16:19:22,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:22,502 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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) [2021-07-09 16:19:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:22,780 INFO L93 Difference]: Finished difference Result 38575 states and 100043 transitions. [2021-07-09 16:19:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:19:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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 268 [2021-07-09 16:19:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:23,068 INFO L225 Difference]: With dead ends: 38575 [2021-07-09 16:19:23,068 INFO L226 Difference]: Without dead ends: 38575 [2021-07-09 16:19:23,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:19:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38575 states. [2021-07-09 16:19:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38575 to 25100. [2021-07-09 16:19:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-07-09 16:19:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-09 16:19:23,500 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 268 [2021-07-09 16:19:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:23,500 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-09 16:19:23,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 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) [2021-07-09 16:19:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-09 16:19:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-09 16:19:23,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:23,530 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:23,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 16:19:23,747 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash 681376844, now seen corresponding path program 6 times [2021-07-09 16:19:23,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:23,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746192857] [2021-07-09 16:19:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:24,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746192857] [2021-07-09 16:19:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746192857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611508872] [2021-07-09 16:19:24,137 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 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 [2021-07-09 16:19:24,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 16:19:24,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:24,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611508872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:24,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:24,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:19:24,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625113316] [2021-07-09 16:19:24,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:24,665 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-07-09 16:19:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:24,914 INFO L93 Difference]: Finished difference Result 35570 states and 92379 transitions. [2021-07-09 16:19:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:19:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 269 [2021-07-09 16:19:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:24,980 INFO L225 Difference]: With dead ends: 35570 [2021-07-09 16:19:24,981 INFO L226 Difference]: Without dead ends: 35570 [2021-07-09 16:19:24,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:19:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35570 states. [2021-07-09 16:19:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35570 to 25100. [2021-07-09 16:19:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 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) [2021-07-09 16:19:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-09 16:19:25,628 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 269 [2021-07-09 16:19:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:25,628 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-09 16:19:25,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-07-09 16:19:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-09 16:19:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-09 16:19:25,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:25,657 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:25,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:25,874 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:25,874 INFO L82 PathProgramCache]: Analyzing trace with hash -14531768, now seen corresponding path program 7 times [2021-07-09 16:19:25,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:25,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920920272] [2021-07-09 16:19:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:19:26,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920920272] [2021-07-09 16:19:26,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920920272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551884673] [2021-07-09 16:19:26,028 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 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 [2021-07-09 16:19:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:26,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551884673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:26,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:26,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 16:19:26,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507940508] [2021-07-09 16:19:26,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:26,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:26,565 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-07-09 16:19:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:26,889 INFO L93 Difference]: Finished difference Result 34595 states and 90013 transitions. [2021-07-09 16:19:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:19:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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 269 [2021-07-09 16:19:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:26,942 INFO L225 Difference]: With dead ends: 34595 [2021-07-09 16:19:26,943 INFO L226 Difference]: Without dead ends: 34595 [2021-07-09 16:19:26,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:19:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34595 states. [2021-07-09 16:19:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34595 to 26920. [2021-07-09 16:19:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26920 states, 26918 states have (on average 2.618991009733264) internal successors, (70498), 26919 states have internal predecessors, (70498), 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) [2021-07-09 16:19:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26920 states to 26920 states and 70498 transitions. [2021-07-09 16:19:27,465 INFO L78 Accepts]: Start accepts. Automaton has 26920 states and 70498 transitions. Word has length 269 [2021-07-09 16:19:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:27,466 INFO L482 AbstractCegarLoop]: Abstraction has 26920 states and 70498 transitions. [2021-07-09 16:19:27,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2021-07-09 16:19:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 26920 states and 70498 transitions. [2021-07-09 16:19:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-07-09 16:19:27,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:27,506 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2021-07-09 16:19:27,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:27,726 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1826871475, now seen corresponding path program 7 times [2021-07-09 16:19:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738620224] [2021-07-09 16:19:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:28,036 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:28,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:28,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738620224] [2021-07-09 16:19:28,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738620224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:28,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742059366] [2021-07-09 16:19:28,057 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 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 [2021-07-09 16:19:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:28,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742059366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:28,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:28,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:19:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868572550] [2021-07-09 16:19:28,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:19:28,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:19:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:19:28,494 INFO L87 Difference]: Start difference. First operand 26920 states and 70498 transitions. Second operand has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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) [2021-07-09 16:19:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:28,866 INFO L93 Difference]: Finished difference Result 36062 states and 94002 transitions. [2021-07-09 16:19:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:19:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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 299 [2021-07-09 16:19:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:28,928 INFO L225 Difference]: With dead ends: 36062 [2021-07-09 16:19:28,929 INFO L226 Difference]: Without dead ends: 36062 [2021-07-09 16:19:28,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:19:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36062 states. [2021-07-09 16:19:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36062 to 30235. [2021-07-09 16:19:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30235 states, 30233 states have (on average 2.6198524790791518) internal successors, (79206), 30234 states have internal predecessors, (79206), 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) [2021-07-09 16:19:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30235 states to 30235 states and 79206 transitions. [2021-07-09 16:19:29,480 INFO L78 Accepts]: Start accepts. Automaton has 30235 states and 79206 transitions. Word has length 299 [2021-07-09 16:19:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:29,481 INFO L482 AbstractCegarLoop]: Abstraction has 30235 states and 79206 transitions. [2021-07-09 16:19:29,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 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) [2021-07-09 16:19:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 30235 states and 79206 transitions. [2021-07-09 16:19:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-07-09 16:19:29,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:29,526 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:29,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:29,737 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1174069078, now seen corresponding path program 3 times [2021-07-09 16:19:29,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:29,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65770396] [2021-07-09 16:19:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 58 proven. 294 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-09 16:19:30,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:30,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65770396] [2021-07-09 16:19:30,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65770396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:30,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460044286] [2021-07-09 16:19:30,019 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 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 [2021-07-09 16:19:30,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 16:19:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:19:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-07-09 16:19:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460044286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:30,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-07-09 16:19:30,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445746127] [2021-07-09 16:19:30,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:19:30,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:19:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:19:30,490 INFO L87 Difference]: Start difference. First operand 30235 states and 79206 transitions. Second operand has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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) [2021-07-09 16:19:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:31,157 INFO L93 Difference]: Finished difference Result 69690 states and 181990 transitions. [2021-07-09 16:19:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:19:31,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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 302 [2021-07-09 16:19:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:31,502 INFO L225 Difference]: With dead ends: 69690 [2021-07-09 16:19:31,502 INFO L226 Difference]: Without dead ends: 69690 [2021-07-09 16:19:31,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1816, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:19:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69690 states. [2021-07-09 16:19:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69690 to 38635. [2021-07-09 16:19:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38635 states, 38633 states have (on average 2.638625009706727) internal successors, (101938), 38634 states have internal predecessors, (101938), 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) [2021-07-09 16:19:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38635 states to 38635 states and 101938 transitions. [2021-07-09 16:19:32,686 INFO L78 Accepts]: Start accepts. Automaton has 38635 states and 101938 transitions. Word has length 302 [2021-07-09 16:19:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:32,687 INFO L482 AbstractCegarLoop]: Abstraction has 38635 states and 101938 transitions. [2021-07-09 16:19:32,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 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) [2021-07-09 16:19:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 38635 states and 101938 transitions. [2021-07-09 16:19:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-09 16:19:32,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:32,737 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:32,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:19:32,952 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:32,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1750337364, now seen corresponding path program 8 times [2021-07-09 16:19:32,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:32,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934157770] [2021-07-09 16:19:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:33,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934157770] [2021-07-09 16:19:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934157770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703916569] [2021-07-09 16:19:33,467 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 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 [2021-07-09 16:19:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:33,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703916569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:33,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:33,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:33,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127641393] [2021-07-09 16:19:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:33,910 INFO L87 Difference]: Start difference. First operand 38635 states and 101938 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:34,399 INFO L93 Difference]: Finished difference Result 58520 states and 153912 transitions. [2021-07-09 16:19:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-07-09 16:19:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:34,525 INFO L225 Difference]: With dead ends: 58520 [2021-07-09 16:19:34,525 INFO L226 Difference]: Without dead ends: 58520 [2021-07-09 16:19:34,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:19:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58520 states. [2021-07-09 16:19:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58520 to 40455. [2021-07-09 16:19:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40455 states, 40453 states have (on average 2.6415593404691866) internal successors, (106859), 40454 states have internal predecessors, (106859), 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) [2021-07-09 16:19:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40455 states to 40455 states and 106859 transitions. [2021-07-09 16:19:35,700 INFO L78 Accepts]: Start accepts. Automaton has 40455 states and 106859 transitions. Word has length 304 [2021-07-09 16:19:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 40455 states and 106859 transitions. [2021-07-09 16:19:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 40455 states and 106859 transitions. [2021-07-09 16:19:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-09 16:19:35,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:35,756 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:35,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 16:19:35,973 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 466033488, now seen corresponding path program 9 times [2021-07-09 16:19:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:35,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181676874] [2021-07-09 16:19:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:36,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:36,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181676874] [2021-07-09 16:19:36,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181676874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:36,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261647220] [2021-07-09 16:19:36,100 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 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 [2021-07-09 16:19:36,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:19:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261647220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:36,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:36,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:36,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095191543] [2021-07-09 16:19:36,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:36,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:36,915 INFO L87 Difference]: Start difference. First operand 40455 states and 106859 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:37,461 INFO L93 Difference]: Finished difference Result 60835 states and 160146 transitions. [2021-07-09 16:19:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:19:37,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-07-09 16:19:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:37,575 INFO L225 Difference]: With dead ends: 60835 [2021-07-09 16:19:37,575 INFO L226 Difference]: Without dead ends: 60835 [2021-07-09 16:19:37,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:19:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2021-07-09 16:19:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 42275. [2021-07-09 16:19:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42275 states, 42273 states have (on average 2.6442410048967426) internal successors, (111780), 42274 states have internal predecessors, (111780), 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) [2021-07-09 16:19:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42275 states to 42275 states and 111780 transitions. [2021-07-09 16:19:38,803 INFO L78 Accepts]: Start accepts. Automaton has 42275 states and 111780 transitions. Word has length 304 [2021-07-09 16:19:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:38,804 INFO L482 AbstractCegarLoop]: Abstraction has 42275 states and 111780 transitions. [2021-07-09 16:19:38,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42275 states and 111780 transitions. [2021-07-09 16:19:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-09 16:19:38,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:38,856 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:39,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:19:39,074 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash -86071852, now seen corresponding path program 10 times [2021-07-09 16:19:39,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:39,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841243665] [2021-07-09 16:19:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:39,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:39,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841243665] [2021-07-09 16:19:39,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841243665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:39,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624853128] [2021-07-09 16:19:39,187 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 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 [2021-07-09 16:19:39,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:39,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:39,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624853128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:39,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:39,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542661757] [2021-07-09 16:19:39,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:39,775 INFO L87 Difference]: Start difference. First operand 42275 states and 111780 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:40,232 INFO L93 Difference]: Finished difference Result 62310 states and 163598 transitions. [2021-07-09 16:19:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:19:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-07-09 16:19:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:40,365 INFO L225 Difference]: With dead ends: 62310 [2021-07-09 16:19:40,365 INFO L226 Difference]: Without dead ends: 62310 [2021-07-09 16:19:40,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62310 states. [2021-07-09 16:19:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62310 to 43355. [2021-07-09 16:19:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43355 states, 43353 states have (on average 2.646506585472747) internal successors, (114734), 43354 states have internal predecessors, (114734), 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) [2021-07-09 16:19:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43355 states to 43355 states and 114734 transitions. [2021-07-09 16:19:41,589 INFO L78 Accepts]: Start accepts. Automaton has 43355 states and 114734 transitions. Word has length 304 [2021-07-09 16:19:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:41,605 INFO L482 AbstractCegarLoop]: Abstraction has 43355 states and 114734 transitions. [2021-07-09 16:19:41,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 43355 states and 114734 transitions. [2021-07-09 16:19:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-09 16:19:41,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:41,698 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:41,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 16:19:41,913 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -781980464, now seen corresponding path program 11 times [2021-07-09 16:19:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396998051] [2021-07-09 16:19:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:42,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:42,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396998051] [2021-07-09 16:19:42,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396998051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:42,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467914182] [2021-07-09 16:19:42,137 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 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 [2021-07-09 16:19:42,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:19:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:42,685 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:42,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467914182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:42,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:42,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:42,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007303820] [2021-07-09 16:19:42,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:42,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:42,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:42,914 INFO L87 Difference]: Start difference. First operand 43355 states and 114734 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:43,274 INFO L93 Difference]: Finished difference Result 61860 states and 162764 transitions. [2021-07-09 16:19:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:19:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-07-09 16:19:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:43,404 INFO L225 Difference]: With dead ends: 61860 [2021-07-09 16:19:43,404 INFO L226 Difference]: Without dead ends: 61860 [2021-07-09 16:19:43,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:19:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61860 states. [2021-07-09 16:19:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61860 to 46255. [2021-07-09 16:19:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46255 states, 46253 states have (on average 2.650833459451279) internal successors, (122609), 46254 states have internal predecessors, (122609), 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) [2021-07-09 16:19:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46255 states to 46255 states and 122609 transitions. [2021-07-09 16:19:44,600 INFO L78 Accepts]: Start accepts. Automaton has 46255 states and 122609 transitions. Word has length 304 [2021-07-09 16:19:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:44,601 INFO L482 AbstractCegarLoop]: Abstraction has 46255 states and 122609 transitions. [2021-07-09 16:19:44,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 46255 states and 122609 transitions. [2021-07-09 16:19:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-09 16:19:44,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:44,661 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:44,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 16:19:44,877 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1013212244, now seen corresponding path program 12 times [2021-07-09 16:19:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:44,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790049803] [2021-07-09 16:19:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:19:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790049803] [2021-07-09 16:19:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790049803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368613803] [2021-07-09 16:19:45,329 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 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 [2021-07-09 16:19:45,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:19:45,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:19:46,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368613803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:46,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:46,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:19:46,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823705106] [2021-07-09 16:19:46,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:46,004 INFO L87 Difference]: Start difference. First operand 46255 states and 122609 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:46,510 INFO L93 Difference]: Finished difference Result 58480 states and 154067 transitions. [2021-07-09 16:19:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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 304 [2021-07-09 16:19:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:46,617 INFO L225 Difference]: With dead ends: 58480 [2021-07-09 16:19:46,617 INFO L226 Difference]: Without dead ends: 58480 [2021-07-09 16:19:46,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:19:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-07-09 16:19:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 49155. [2021-07-09 16:19:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49155 states, 49153 states have (on average 2.654649767053893) internal successors, (130484), 49154 states have internal predecessors, (130484), 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) [2021-07-09 16:19:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49155 states to 49155 states and 130484 transitions. [2021-07-09 16:19:47,848 INFO L78 Accepts]: Start accepts. Automaton has 49155 states and 130484 transitions. Word has length 304 [2021-07-09 16:19:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:47,848 INFO L482 AbstractCegarLoop]: Abstraction has 49155 states and 130484 transitions. [2021-07-09 16:19:47,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 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) [2021-07-09 16:19:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 49155 states and 130484 transitions. [2021-07-09 16:19:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-07-09 16:19:47,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:47,920 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-07-09 16:19:48,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:48,134 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash 826022447, now seen corresponding path program 8 times [2021-07-09 16:19:48,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:48,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556240893] [2021-07-09 16:19:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556240893] [2021-07-09 16:19:48,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556240893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977947043] [2021-07-09 16:19:48,336 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 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 [2021-07-09 16:19:48,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:48,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:48,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:48,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977947043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:48,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:48,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:19:48,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413289252] [2021-07-09 16:19:48,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:19:48,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:19:48,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:19:48,827 INFO L87 Difference]: Start difference. First operand 49155 states and 130484 transitions. Second operand has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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) [2021-07-09 16:19:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:49,417 INFO L93 Difference]: Finished difference Result 57822 states and 152463 transitions. [2021-07-09 16:19:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:19:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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 334 [2021-07-09 16:19:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:49,538 INFO L225 Difference]: With dead ends: 57822 [2021-07-09 16:19:49,538 INFO L226 Difference]: Without dead ends: 57822 [2021-07-09 16:19:49,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:19:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57822 states. [2021-07-09 16:19:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57822 to 51390. [2021-07-09 16:19:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51390 states, 51388 states have (on average 2.6511636958044678) internal successors, (136238), 51389 states have internal predecessors, (136238), 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) [2021-07-09 16:19:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51390 states to 51390 states and 136238 transitions. [2021-07-09 16:19:50,787 INFO L78 Accepts]: Start accepts. Automaton has 51390 states and 136238 transitions. Word has length 334 [2021-07-09 16:19:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:50,787 INFO L482 AbstractCegarLoop]: Abstraction has 51390 states and 136238 transitions. [2021-07-09 16:19:50,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 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) [2021-07-09 16:19:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 51390 states and 136238 transitions. [2021-07-09 16:19:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-09 16:19:50,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:50,854 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:51,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 16:19:51,070 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 764082061, now seen corresponding path program 4 times [2021-07-09 16:19:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993555434] [2021-07-09 16:19:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:19:51,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993555434] [2021-07-09 16:19:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993555434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175222241] [2021-07-09 16:19:51,178 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 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 [2021-07-09 16:19:51,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:51,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:51,621 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:19:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175222241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:51,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:51,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:51,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987146000] [2021-07-09 16:19:51,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:51,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:51,956 INFO L87 Difference]: Start difference. First operand 51390 states and 136238 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:19:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:52,378 INFO L93 Difference]: Finished difference Result 76125 states and 201014 transitions. [2021-07-09 16:19:52,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:19:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-07-09 16:19:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:52,704 INFO L225 Difference]: With dead ends: 76125 [2021-07-09 16:19:52,704 INFO L226 Difference]: Without dead ends: 76125 [2021-07-09 16:19:52,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:19:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76125 states. [2021-07-09 16:19:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76125 to 53550. [2021-07-09 16:19:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53550 states, 53548 states have (on average 2.6545529244789723) internal successors, (142146), 53549 states have internal predecessors, (142146), 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) [2021-07-09 16:19:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53550 states to 53550 states and 142146 transitions. [2021-07-09 16:19:54,254 INFO L78 Accepts]: Start accepts. Automaton has 53550 states and 142146 transitions. Word has length 338 [2021-07-09 16:19:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:54,254 INFO L482 AbstractCegarLoop]: Abstraction has 53550 states and 142146 transitions. [2021-07-09 16:19:54,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:19:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 53550 states and 142146 transitions. [2021-07-09 16:19:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-09 16:19:54,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:54,334 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:54,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:54,552 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash -361196817, now seen corresponding path program 5 times [2021-07-09 16:19:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:54,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676622415] [2021-07-09 16:19:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:19:54,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676622415] [2021-07-09 16:19:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676622415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175376721] [2021-07-09 16:19:54,750 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 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 [2021-07-09 16:19:55,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:19:55,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:19:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175376721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:55,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:55,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:55,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042228783] [2021-07-09 16:19:55,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:55,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:55,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:55,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:55,387 INFO L87 Difference]: Start difference. First operand 53550 states and 142146 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:19:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:55,967 INFO L93 Difference]: Finished difference Result 74195 states and 195180 transitions. [2021-07-09 16:19:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:19:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-07-09 16:19:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:56,137 INFO L225 Difference]: With dead ends: 74195 [2021-07-09 16:19:56,138 INFO L226 Difference]: Without dead ends: 74195 [2021-07-09 16:19:56,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:19:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74195 states. [2021-07-09 16:19:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74195 to 54890. [2021-07-09 16:19:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 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) [2021-07-09 16:19:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-07-09 16:19:57,568 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-07-09 16:19:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:57,568 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-07-09 16:19:57,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:19:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-07-09 16:19:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-09 16:19:57,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:57,660 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:19:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:19:57,877 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash -211780843, now seen corresponding path program 6 times [2021-07-09 16:19:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698976948] [2021-07-09 16:19:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:19:57,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698976948] [2021-07-09 16:19:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698976948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442643819] [2021-07-09 16:19:57,999 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 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 [2021-07-09 16:19:58,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:19:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:19:58,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442643819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:58,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:58,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:19:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556829200] [2021-07-09 16:19:58,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:58,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:58,943 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:19:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:59,696 INFO L93 Difference]: Finished difference Result 79850 states and 210905 transitions. [2021-07-09 16:19:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-07-09 16:19:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:59,877 INFO L225 Difference]: With dead ends: 79850 [2021-07-09 16:19:59,877 INFO L226 Difference]: Without dead ends: 79850 [2021-07-09 16:19:59,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:20:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79850 states. [2021-07-09 16:20:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79850 to 54890. [2021-07-09 16:20:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 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) [2021-07-09 16:20:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-07-09 16:20:01,456 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-07-09 16:20:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:01,457 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-07-09 16:20:01,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:20:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-07-09 16:20:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-09 16:20:01,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:01,550 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:01,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:01,767 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1337059721, now seen corresponding path program 7 times [2021-07-09 16:20:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774882506] [2021-07-09 16:20:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:20:01,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774882506] [2021-07-09 16:20:01,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774882506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813454302] [2021-07-09 16:20:01,891 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 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 [2021-07-09 16:20:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:02,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813454302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:02,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:02,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:20:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243343279] [2021-07-09 16:20:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:02,325 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:20:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:02,955 INFO L93 Difference]: Finished difference Result 76925 states and 202929 transitions. [2021-07-09 16:20:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-07-09 16:20:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:03,131 INFO L225 Difference]: With dead ends: 76925 [2021-07-09 16:20:03,132 INFO L226 Difference]: Without dead ends: 76925 [2021-07-09 16:20:03,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76925 states. [2021-07-09 16:20:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76925 to 56710. [2021-07-09 16:20:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56710 states, 56708 states have (on average 2.6571912252239542) internal successors, (150684), 56709 states have internal predecessors, (150684), 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) [2021-07-09 16:20:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56710 states to 56710 states and 150684 transitions. [2021-07-09 16:20:04,576 INFO L78 Accepts]: Start accepts. Automaton has 56710 states and 150684 transitions. Word has length 338 [2021-07-09 16:20:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:04,576 INFO L482 AbstractCegarLoop]: Abstraction has 56710 states and 150684 transitions. [2021-07-09 16:20:04,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:20:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 56710 states and 150684 transitions. [2021-07-09 16:20:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-09 16:20:04,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:04,678 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:04,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 16:20:04,893 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1805004757, now seen corresponding path program 8 times [2021-07-09 16:20:04,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615740926] [2021-07-09 16:20:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:20:05,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615740926] [2021-07-09 16:20:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615740926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071496585] [2021-07-09 16:20:05,281 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 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 [2021-07-09 16:20:05,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:05,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071496585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:05,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:05,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:20:05,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134621590] [2021-07-09 16:20:05,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:05,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:05,966 INFO L87 Difference]: Start difference. First operand 56710 states and 150684 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:20:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:06,800 INFO L93 Difference]: Finished difference Result 72430 states and 190479 transitions. [2021-07-09 16:20:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:06,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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 338 [2021-07-09 16:20:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:06,940 INFO L225 Difference]: With dead ends: 72430 [2021-07-09 16:20:06,941 INFO L226 Difference]: Without dead ends: 72430 [2021-07-09 16:20:06,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72430 states. [2021-07-09 16:20:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72430 to 56970. [2021-07-09 16:20:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 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) [2021-07-09 16:20:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-07-09 16:20:08,564 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 338 [2021-07-09 16:20:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:08,565 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-07-09 16:20:08,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 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) [2021-07-09 16:20:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-07-09 16:20:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:08,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:08,672 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:08,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:08,889 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash 608153804, now seen corresponding path program 13 times [2021-07-09 16:20:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:08,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102342950] [2021-07-09 16:20:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:09,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:09,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102342950] [2021-07-09 16:20:09,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102342950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:09,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586371090] [2021-07-09 16:20:09,133 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 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 [2021-07-09 16:20:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:09,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586371090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:09,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:09,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:09,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308329795] [2021-07-09 16:20:09,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:09,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:09,862 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:10,573 INFO L93 Difference]: Finished difference Result 80730 states and 213255 transitions. [2021-07-09 16:20:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:20:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:10,757 INFO L225 Difference]: With dead ends: 80730 [2021-07-09 16:20:10,757 INFO L226 Difference]: Without dead ends: 80730 [2021-07-09 16:20:10,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:20:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80730 states. [2021-07-09 16:20:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80730 to 56970. [2021-07-09 16:20:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 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) [2021-07-09 16:20:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-07-09 16:20:12,408 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 339 [2021-07-09 16:20:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:12,409 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-07-09 16:20:12,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-07-09 16:20:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:12,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:12,864 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:13,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 16:20:13,080 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash -676150072, now seen corresponding path program 14 times [2021-07-09 16:20:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:13,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758822270] [2021-07-09 16:20:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:13,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:13,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758822270] [2021-07-09 16:20:13,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758822270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:13,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666256415] [2021-07-09 16:20:13,207 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 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 [2021-07-09 16:20:13,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:13,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:13,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666256415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:13,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:13,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111519402] [2021-07-09 16:20:13,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:13,686 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:14,350 INFO L93 Difference]: Finished difference Result 83430 states and 220365 transitions. [2021-07-09 16:20:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:14,528 INFO L225 Difference]: With dead ends: 83430 [2021-07-09 16:20:14,529 INFO L226 Difference]: Without dead ends: 83430 [2021-07-09 16:20:14,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:20:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83430 states. [2021-07-09 16:20:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83430 to 58790. [2021-07-09 16:20:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58790 states, 58788 states have (on average 2.6581615295638565) internal successors, (156268), 58789 states have internal predecessors, (156268), 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) [2021-07-09 16:20:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58790 states to 58790 states and 156268 transitions. [2021-07-09 16:20:15,979 INFO L78 Accepts]: Start accepts. Automaton has 58790 states and 156268 transitions. Word has length 339 [2021-07-09 16:20:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:15,979 INFO L482 AbstractCegarLoop]: Abstraction has 58790 states and 156268 transitions. [2021-07-09 16:20:15,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58790 states and 156268 transitions. [2021-07-09 16:20:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:16,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:16,076 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:16,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:16,293 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1228255412, now seen corresponding path program 15 times [2021-07-09 16:20:16,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:16,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824158346] [2021-07-09 16:20:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:16,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824158346] [2021-07-09 16:20:16,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824158346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118067004] [2021-07-09 16:20:16,422 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 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 [2021-07-09 16:20:16,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:20:16,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:17,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118067004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:17,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:17,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:17,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504468934] [2021-07-09 16:20:17,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:17,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:17,330 INFO L87 Difference]: Start difference. First operand 58790 states and 156268 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:17,949 INFO L93 Difference]: Finished difference Result 86710 states and 229239 transitions. [2021-07-09 16:20:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:20:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:18,154 INFO L225 Difference]: With dead ends: 86710 [2021-07-09 16:20:18,154 INFO L226 Difference]: Without dead ends: 86710 [2021-07-09 16:20:18,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86710 states. [2021-07-09 16:20:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86710 to 60610. [2021-07-09 16:20:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60608 states have (on average 2.659533394931362) internal successors, (161189), 60609 states have internal predecessors, (161189), 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) [2021-07-09 16:20:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 161189 transitions. [2021-07-09 16:20:19,589 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 161189 transitions. Word has length 339 [2021-07-09 16:20:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:19,589 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 161189 transitions. [2021-07-09 16:20:19,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 161189 transitions. [2021-07-09 16:20:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:19,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:19,685 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:19,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:20:19,901 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1924164024, now seen corresponding path program 16 times [2021-07-09 16:20:19,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:19,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758103497] [2021-07-09 16:20:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:20,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758103497] [2021-07-09 16:20:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758103497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289690301] [2021-07-09 16:20:20,040 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 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 [2021-07-09 16:20:20,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:21,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289690301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:21,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:21,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:21,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259609404] [2021-07-09 16:20:21,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:21,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:21,162 INFO L87 Difference]: Start difference. First operand 60610 states and 161189 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:21,966 INFO L93 Difference]: Finished difference Result 88725 states and 234124 transitions. [2021-07-09 16:20:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:20:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:22,152 INFO L225 Difference]: With dead ends: 88725 [2021-07-09 16:20:22,152 INFO L226 Difference]: Without dead ends: 88725 [2021-07-09 16:20:22,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88725 states. [2021-07-09 16:20:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88725 to 67490. [2021-07-09 16:20:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67490 states, 67488 states have (on average 2.6655553579895686) internal successors, (179893), 67489 states have internal predecessors, (179893), 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) [2021-07-09 16:20:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67490 states to 67490 states and 179893 transitions. [2021-07-09 16:20:23,879 INFO L78 Accepts]: Start accepts. Automaton has 67490 states and 179893 transitions. Word has length 339 [2021-07-09 16:20:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:23,879 INFO L482 AbstractCegarLoop]: Abstraction has 67490 states and 179893 transitions. [2021-07-09 16:20:23,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 67490 states and 179893 transitions. [2021-07-09 16:20:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:23,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:23,988 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:24,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:20:24,206 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:24,206 INFO L82 PathProgramCache]: Analyzing trace with hash -128971316, now seen corresponding path program 17 times [2021-07-09 16:20:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:24,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611595184] [2021-07-09 16:20:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:24,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:24,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611595184] [2021-07-09 16:20:24,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611595184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:24,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303932829] [2021-07-09 16:20:24,416 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 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 [2021-07-09 16:20:24,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:20:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:25,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303932829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:25,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:25,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:25,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221470829] [2021-07-09 16:20:25,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:25,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:25,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:25,449 INFO L87 Difference]: Start difference. First operand 67490 states and 179893 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:25,930 INFO L93 Difference]: Finished difference Result 85430 states and 225749 transitions. [2021-07-09 16:20:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:26,307 INFO L225 Difference]: With dead ends: 85430 [2021-07-09 16:20:26,307 INFO L226 Difference]: Without dead ends: 85430 [2021-07-09 16:20:26,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:20:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85430 states. [2021-07-09 16:20:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85430 to 71470. [2021-07-09 16:20:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71470 states, 71468 states have (on average 2.6686349135277325) internal successors, (190722), 71469 states have internal predecessors, (190722), 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) [2021-07-09 16:20:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71470 states to 71470 states and 190722 transitions. [2021-07-09 16:20:28,117 INFO L78 Accepts]: Start accepts. Automaton has 71470 states and 190722 transitions. Word has length 339 [2021-07-09 16:20:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:28,117 INFO L482 AbstractCegarLoop]: Abstraction has 71470 states and 190722 transitions. [2021-07-09 16:20:28,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 71470 states and 190722 transitions. [2021-07-09 16:20:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-09 16:20:28,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:28,252 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:28,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:20:28,470 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 18696136, now seen corresponding path program 18 times [2021-07-09 16:20:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:28,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555551280] [2021-07-09 16:20:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:20:28,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555551280] [2021-07-09 16:20:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555551280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927733795] [2021-07-09 16:20:28,614 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 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 [2021-07-09 16:20:28,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:20:28,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:28,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:29,276 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:20:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927733795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:20:29,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343238919] [2021-07-09 16:20:29,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:29,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:29,566 INFO L87 Difference]: Start difference. First operand 71470 states and 190722 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:30,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:30,059 INFO L93 Difference]: Finished difference Result 82005 states and 217163 transitions. [2021-07-09 16:20:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:30,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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 339 [2021-07-09 16:20:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:30,425 INFO L225 Difference]: With dead ends: 82005 [2021-07-09 16:20:30,425 INFO L226 Difference]: Without dead ends: 82005 [2021-07-09 16:20:30,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82005 states. [2021-07-09 16:20:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82005 to 70390. [2021-07-09 16:20:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70390 states, 70388 states have (on average 2.6676137978064443) internal successors, (187768), 70389 states have internal predecessors, (187768), 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) [2021-07-09 16:20:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70390 states to 70390 states and 187768 transitions. [2021-07-09 16:20:31,925 INFO L78 Accepts]: Start accepts. Automaton has 70390 states and 187768 transitions. Word has length 339 [2021-07-09 16:20:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:31,925 INFO L482 AbstractCegarLoop]: Abstraction has 70390 states and 187768 transitions. [2021-07-09 16:20:31,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 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) [2021-07-09 16:20:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 70390 states and 187768 transitions. [2021-07-09 16:20:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-07-09 16:20:32,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:32,041 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-07-09 16:20:32,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 16:20:32,261 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 165063693, now seen corresponding path program 9 times [2021-07-09 16:20:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:32,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023381798] [2021-07-09 16:20:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:32,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:32,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023381798] [2021-07-09 16:20:32,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023381798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:32,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950430244] [2021-07-09 16:20:32,567 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 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 [2021-07-09 16:20:33,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:20:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:33,568 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:33,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950430244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:33,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:33,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:20:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499397143] [2021-07-09 16:20:33,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:20:33,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:20:33,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:20:33,851 INFO L87 Difference]: Start difference. First operand 70390 states and 187768 transitions. Second operand has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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) [2021-07-09 16:20:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:34,597 INFO L93 Difference]: Finished difference Result 80742 states and 214130 transitions. [2021-07-09 16:20:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:20:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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 369 [2021-07-09 16:20:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:34,775 INFO L225 Difference]: With dead ends: 80742 [2021-07-09 16:20:34,776 INFO L226 Difference]: Without dead ends: 80742 [2021-07-09 16:20:34,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:20:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80742 states. [2021-07-09 16:20:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80742 to 73705. [2021-07-09 16:20:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73705 states, 73703 states have (on average 2.6657802260423593) internal successors, (196476), 73704 states have internal predecessors, (196476), 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) [2021-07-09 16:20:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73705 states to 73705 states and 196476 transitions. [2021-07-09 16:20:36,620 INFO L78 Accepts]: Start accepts. Automaton has 73705 states and 196476 transitions. Word has length 369 [2021-07-09 16:20:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:36,621 INFO L482 AbstractCegarLoop]: Abstraction has 73705 states and 196476 transitions. [2021-07-09 16:20:36,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 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) [2021-07-09 16:20:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73705 states and 196476 transitions. [2021-07-09 16:20:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:36,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:36,749 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:36,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:20:36,965 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1476003443, now seen corresponding path program 9 times [2021-07-09 16:20:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:36,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663977084] [2021-07-09 16:20:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:37,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:37,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663977084] [2021-07-09 16:20:37,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663977084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:37,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665186518] [2021-07-09 16:20:37,097 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 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 [2021-07-09 16:20:37,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:20:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:37,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665186518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:38,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:38,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:38,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858624036] [2021-07-09 16:20:38,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:38,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:38,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:38,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:38,206 INFO L87 Difference]: Start difference. First operand 73705 states and 196476 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:39,080 INFO L93 Difference]: Finished difference Result 96845 states and 256215 transitions. [2021-07-09 16:20:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:20:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:20:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:39,267 INFO L225 Difference]: With dead ends: 96845 [2021-07-09 16:20:39,267 INFO L226 Difference]: Without dead ends: 96845 [2021-07-09 16:20:39,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96845 states. [2021-07-09 16:20:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96845 to 71885. [2021-07-09 16:20:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71885 states, 71883 states have (on average 2.664816437822573) internal successors, (191555), 71884 states have internal predecessors, (191555), 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) [2021-07-09 16:20:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71885 states to 71885 states and 191555 transitions. [2021-07-09 16:20:41,017 INFO L78 Accepts]: Start accepts. Automaton has 71885 states and 191555 transitions. Word has length 373 [2021-07-09 16:20:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:41,017 INFO L482 AbstractCegarLoop]: Abstraction has 71885 states and 191555 transitions. [2021-07-09 16:20:41,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 71885 states and 191555 transitions. [2021-07-09 16:20:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:41,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:41,701 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:41,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 16:20:41,902 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2061910789, now seen corresponding path program 10 times [2021-07-09 16:20:41,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079724296] [2021-07-09 16:20:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:42,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:42,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079724296] [2021-07-09 16:20:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079724296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:42,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629177272] [2021-07-09 16:20:42,025 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 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 [2021-07-09 16:20:42,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629177272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:42,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:42,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:42,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154164675] [2021-07-09 16:20:42,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:42,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:42,576 INFO L87 Difference]: Start difference. First operand 71885 states and 191555 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:43,508 INFO L93 Difference]: Finished difference Result 111885 states and 296684 transitions. [2021-07-09 16:20:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:20:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:43,757 INFO L225 Difference]: With dead ends: 111885 [2021-07-09 16:20:43,757 INFO L226 Difference]: Without dead ends: 111885 [2021-07-09 16:20:43,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:20:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2021-07-09 16:20:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 72965. [2021-07-09 16:20:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72965 states, 72963 states have (on average 2.665858037635514) internal successors, (194509), 72964 states have internal predecessors, (194509), 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) [2021-07-09 16:20:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72965 states to 72965 states and 194509 transitions. [2021-07-09 16:20:46,005 INFO L78 Accepts]: Start accepts. Automaton has 72965 states and 194509 transitions. Word has length 373 [2021-07-09 16:20:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:46,005 INFO L482 AbstractCegarLoop]: Abstraction has 72965 states and 194509 transitions. [2021-07-09 16:20:46,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 72965 states and 194509 transitions. [2021-07-09 16:20:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:46,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:46,122 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:46,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 16:20:46,339 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash 936631911, now seen corresponding path program 11 times [2021-07-09 16:20:46,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:46,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038098458] [2021-07-09 16:20:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:46,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038098458] [2021-07-09 16:20:46,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038098458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:46,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937430269] [2021-07-09 16:20:46,458 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 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 [2021-07-09 16:20:46,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:20:46,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937430269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:47,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:47,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740984129] [2021-07-09 16:20:47,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:47,671 INFO L87 Difference]: Start difference. First operand 72965 states and 194509 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:48,451 INFO L93 Difference]: Finished difference Result 99130 states and 261670 transitions. [2021-07-09 16:20:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:20:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:48,678 INFO L225 Difference]: With dead ends: 99130 [2021-07-09 16:20:48,678 INFO L226 Difference]: Without dead ends: 99130 [2021-07-09 16:20:48,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:20:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99130 states. [2021-07-09 16:20:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99130 to 76125. [2021-07-09 16:20:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-07-09 16:20:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-09 16:20:50,492 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-09 16:20:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:50,493 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-09 16:20:50,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-09 16:20:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:50,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:50,989 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:51,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:51,206 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1086047885, now seen corresponding path program 12 times [2021-07-09 16:20:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:51,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793551926] [2021-07-09 16:20:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:51,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793551926] [2021-07-09 16:20:51,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793551926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:51,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113412523] [2021-07-09 16:20:51,361 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:51,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:20:51,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:52,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113412523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:52,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:52,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:52,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225912918] [2021-07-09 16:20:52,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:52,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:52,013 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:52,765 INFO L93 Difference]: Finished difference Result 115565 states and 306636 transitions. [2021-07-09 16:20:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:52,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:20:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:53,015 INFO L225 Difference]: With dead ends: 115565 [2021-07-09 16:20:53,015 INFO L226 Difference]: Without dead ends: 115565 [2021-07-09 16:20:53,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:20:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115565 states. [2021-07-09 16:20:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115565 to 77205. [2021-07-09 16:20:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77205 states, 77203 states have (on average 2.66830304521845) internal successors, (206001), 77204 states have internal predecessors, (206001), 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) [2021-07-09 16:20:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77205 states to 77205 states and 206001 transitions. [2021-07-09 16:20:55,110 INFO L78 Accepts]: Start accepts. Automaton has 77205 states and 206001 transitions. Word has length 373 [2021-07-09 16:20:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:55,111 INFO L482 AbstractCegarLoop]: Abstraction has 77205 states and 206001 transitions. [2021-07-09 16:20:55,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 77205 states and 206001 transitions. [2021-07-09 16:20:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:55,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:55,231 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:55,445 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -39230993, now seen corresponding path program 13 times [2021-07-09 16:20:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:55,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840911616] [2021-07-09 16:20:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:55,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840911616] [2021-07-09 16:20:55,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840911616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:55,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018891909] [2021-07-09 16:20:55,565 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:55,972 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 16:20:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:20:56,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018891909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:56,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:56,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:56,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860139875] [2021-07-09 16:20:56,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:56,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:56,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:56,336 INFO L87 Difference]: Start difference. First operand 77205 states and 206001 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:57,155 INFO L93 Difference]: Finished difference Result 115715 states and 307239 transitions. [2021-07-09 16:20:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:20:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:57,403 INFO L225 Difference]: With dead ends: 115715 [2021-07-09 16:20:57,403 INFO L226 Difference]: Without dead ends: 115715 [2021-07-09 16:20:57,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:20:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115715 states. [2021-07-09 16:20:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115715 to 79025. [2021-07-09 16:20:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79025 states, 79023 states have (on average 2.6691216481277604) internal successors, (210922), 79024 states have internal predecessors, (210922), 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) [2021-07-09 16:20:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79025 states to 79025 states and 210922 transitions. [2021-07-09 16:20:59,601 INFO L78 Accepts]: Start accepts. Automaton has 79025 states and 210922 transitions. Word has length 373 [2021-07-09 16:20:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:59,602 INFO L482 AbstractCegarLoop]: Abstraction has 79025 states and 210922 transitions. [2021-07-09 16:20:59,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:20:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 79025 states and 210922 transitions. [2021-07-09 16:20:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:20:59,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:59,742 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:20:59,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:59,960 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1192133811, now seen corresponding path program 14 times [2021-07-09 16:20:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:59,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348166607] [2021-07-09 16:20:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:00,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348166607] [2021-07-09 16:21:00,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348166607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194832252] [2021-07-09 16:21:00,079 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:00,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:00,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:00,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194832252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:00,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:00,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:00,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597267936] [2021-07-09 16:21:00,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:00,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:00,576 INFO L87 Difference]: Start difference. First operand 79025 states and 210922 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:01,360 INFO L93 Difference]: Finished difference Result 100250 states and 264700 transitions. [2021-07-09 16:21:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:21:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:21:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:01,605 INFO L225 Difference]: With dead ends: 100250 [2021-07-09 16:21:01,605 INFO L226 Difference]: Without dead ends: 100250 [2021-07-09 16:21:01,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:21:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100250 states. [2021-07-09 16:21:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100250 to 76125. [2021-07-09 16:21:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-07-09 16:21:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-09 16:21:03,759 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-09 16:21:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:03,759 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-09 16:21:03,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-09 16:21:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:21:03,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:03,880 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:21:04,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 16:21:04,097 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1580553733, now seen corresponding path program 15 times [2021-07-09 16:21:04,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:04,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522434952] [2021-07-09 16:21:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:21:04,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522434952] [2021-07-09 16:21:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522434952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107975056] [2021-07-09 16:21:04,227 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:04,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:21:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:05,020 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:21:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:05,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107975056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:05,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:05,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:05,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301834473] [2021-07-09 16:21:05,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:05,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:05,164 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:05,761 INFO L93 Difference]: Finished difference Result 108675 states and 288358 transitions. [2021-07-09 16:21:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:21:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:21:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:06,199 INFO L225 Difference]: With dead ends: 108675 [2021-07-09 16:21:06,200 INFO L226 Difference]: Without dead ends: 108675 [2021-07-09 16:21:06,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:21:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108675 states. [2021-07-09 16:21:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108675 to 76125. [2021-07-09 16:21:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 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) [2021-07-09 16:21:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-09 16:21:08,122 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-09 16:21:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:08,123 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-09 16:21:08,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-09 16:21:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:21:08,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:08,855 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:21:09,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:09,072 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash 455274855, now seen corresponding path program 16 times [2021-07-09 16:21:09,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:09,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659233423] [2021-07-09 16:21:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:21:09,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659233423] [2021-07-09 16:21:09,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659233423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:09,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344936074] [2021-07-09 16:21:09,202 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:09,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:09,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344936074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:09,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:09,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552464928] [2021-07-09 16:21:09,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:09,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:09,844 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:10,674 INFO L93 Difference]: Finished difference Result 110765 states and 293455 transitions. [2021-07-09 16:21:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:10,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:21:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:10,931 INFO L225 Difference]: With dead ends: 110765 [2021-07-09 16:21:10,931 INFO L226 Difference]: Without dead ends: 110765 [2021-07-09 16:21:10,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:21:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110765 states. [2021-07-09 16:21:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110765 to 75045. [2021-07-09 16:21:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75045 states, 75043 states have (on average 2.6663779433125008) internal successors, (200093), 75044 states have internal predecessors, (200093), 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) [2021-07-09 16:21:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75045 states to 75045 states and 200093 transitions. [2021-07-09 16:21:12,984 INFO L78 Accepts]: Start accepts. Automaton has 75045 states and 200093 transitions. Word has length 373 [2021-07-09 16:21:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:12,984 INFO L482 AbstractCegarLoop]: Abstraction has 75045 states and 200093 transitions. [2021-07-09 16:21:12,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 75045 states and 200093 transitions. [2021-07-09 16:21:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:21:13,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:13,097 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:21:13,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:13,311 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash -697627963, now seen corresponding path program 17 times [2021-07-09 16:21:13,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:13,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765235987] [2021-07-09 16:21:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:21:13,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765235987] [2021-07-09 16:21:13,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765235987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:13,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581613768] [2021-07-09 16:21:13,504 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:13,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:21:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:14,116 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:21:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:14,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581613768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:14,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:14,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:14,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818828829] [2021-07-09 16:21:14,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:14,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:14,458 INFO L87 Difference]: Start difference. First operand 75045 states and 200093 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:15,180 INFO L93 Difference]: Finished difference Result 108165 states and 286375 transitions. [2021-07-09 16:21:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:15,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:21:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:15,420 INFO L225 Difference]: With dead ends: 108165 [2021-07-09 16:21:15,420 INFO L226 Difference]: Without dead ends: 108165 [2021-07-09 16:21:15,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108165 states. [2021-07-09 16:21:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108165 to 78685. [2021-07-09 16:21:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78685 states, 78683 states have (on average 2.668111281979589) internal successors, (209935), 78684 states have internal predecessors, (209935), 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) [2021-07-09 16:21:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78685 states to 78685 states and 209935 transitions. [2021-07-09 16:21:17,168 INFO L78 Accepts]: Start accepts. Automaton has 78685 states and 209935 transitions. Word has length 373 [2021-07-09 16:21:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:17,169 INFO L482 AbstractCegarLoop]: Abstraction has 78685 states and 209935 transitions. [2021-07-09 16:21:17,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 78685 states and 209935 transitions. [2021-07-09 16:21:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-09 16:21:17,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:17,960 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:21:18,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 16:21:18,178 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash -237304665, now seen corresponding path program 18 times [2021-07-09 16:21:18,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:18,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834048801] [2021-07-09 16:21:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:21:18,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:18,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834048801] [2021-07-09 16:21:18,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834048801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:18,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427370197] [2021-07-09 16:21:18,306 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:18,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:21:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:21:19,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427370197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:19,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:19,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:19,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606915387] [2021-07-09 16:21:19,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:19,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:19,027 INFO L87 Difference]: Start difference. First operand 78685 states and 209935 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:19,956 INFO L93 Difference]: Finished difference Result 100025 states and 264232 transitions. [2021-07-09 16:21:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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 373 [2021-07-09 16:21:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:20,190 INFO L225 Difference]: With dead ends: 100025 [2021-07-09 16:21:20,190 INFO L226 Difference]: Without dead ends: 100025 [2021-07-09 16:21:20,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100025 states. [2021-07-09 16:21:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100025 to 82925. [2021-07-09 16:21:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-07-09 16:21:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-09 16:21:22,225 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 373 [2021-07-09 16:21:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:22,226 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-09 16:21:22,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 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) [2021-07-09 16:21:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-09 16:21:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:22,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:22,358 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:22,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 16:21:22,574 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:22,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2108828588, now seen corresponding path program 19 times [2021-07-09 16:21:22,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:22,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243358816] [2021-07-09 16:21:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:23,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243358816] [2021-07-09 16:21:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243358816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523314554] [2021-07-09 16:21:23,042 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:23,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523314554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:23,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:23,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:23,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827570311] [2021-07-09 16:21:23,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:23,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:23,553 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:24,317 INFO L93 Difference]: Finished difference Result 106480 states and 282217 transitions. [2021-07-09 16:21:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:21:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:24,550 INFO L225 Difference]: With dead ends: 106480 [2021-07-09 16:21:24,551 INFO L226 Difference]: Without dead ends: 106480 [2021-07-09 16:21:24,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:21:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106480 states. [2021-07-09 16:21:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106480 to 82925. [2021-07-09 16:21:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-07-09 16:21:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-09 16:21:26,961 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-07-09 16:21:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:26,962 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-09 16:21:26,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-09 16:21:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:27,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:27,088 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:27,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 16:21:27,305 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 901834832, now seen corresponding path program 20 times [2021-07-09 16:21:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:27,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457608656] [2021-07-09 16:21:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:27,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:27,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457608656] [2021-07-09 16:21:27,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457608656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:27,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686906469] [2021-07-09 16:21:27,445 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:27,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:27,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:27,955 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:21:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686906469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207927865] [2021-07-09 16:21:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:28,200 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:28,967 INFO L93 Difference]: Finished difference Result 109145 states and 289012 transitions. [2021-07-09 16:21:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:21:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:29,200 INFO L225 Difference]: With dead ends: 109145 [2021-07-09 16:21:29,201 INFO L226 Difference]: Without dead ends: 109145 [2021-07-09 16:21:29,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:21:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109145 states. [2021-07-09 16:21:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109145 to 82925. [2021-07-09 16:21:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 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) [2021-07-09 16:21:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-09 16:21:31,512 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-07-09 16:21:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:31,513 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-09 16:21:31,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-09 16:21:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:31,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:31,651 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:31,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:31,868 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 349729492, now seen corresponding path program 21 times [2021-07-09 16:21:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:31,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398803501] [2021-07-09 16:21:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:32,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:32,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398803501] [2021-07-09 16:21:32,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398803501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:32,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295501122] [2021-07-09 16:21:32,009 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:32,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:21:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:32,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295501122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:32,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:32,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832089000] [2021-07-09 16:21:32,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:32,637 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:33,656 INFO L93 Difference]: Finished difference Result 111730 states and 295808 transitions. [2021-07-09 16:21:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:34,081 INFO L225 Difference]: With dead ends: 111730 [2021-07-09 16:21:34,081 INFO L226 Difference]: Without dead ends: 111730 [2021-07-09 16:21:34,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:21:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111730 states. [2021-07-09 16:21:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111730 to 84745. [2021-07-09 16:21:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84745 states, 84743 states have (on average 2.670993474387265) internal successors, (226348), 84744 states have internal predecessors, (226348), 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) [2021-07-09 16:21:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84745 states to 84745 states and 226348 transitions. [2021-07-09 16:21:35,938 INFO L78 Accepts]: Start accepts. Automaton has 84745 states and 226348 transitions. Word has length 374 [2021-07-09 16:21:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 84745 states and 226348 transitions. [2021-07-09 16:21:35,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 84745 states and 226348 transitions. [2021-07-09 16:21:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:36,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:36,579 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:36,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:36,796 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash -346179120, now seen corresponding path program 22 times [2021-07-09 16:21:36,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:36,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965983201] [2021-07-09 16:21:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:36,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965983201] [2021-07-09 16:21:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965983201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013562511] [2021-07-09 16:21:36,938 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:37,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:37,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013562511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:37,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:37,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:37,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332448199] [2021-07-09 16:21:37,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:37,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:37,753 INFO L87 Difference]: Start difference. First operand 84745 states and 226348 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:38,576 INFO L93 Difference]: Finished difference Result 111965 states and 296607 transitions. [2021-07-09 16:21:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:21:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:38,828 INFO L225 Difference]: With dead ends: 111965 [2021-07-09 16:21:38,829 INFO L226 Difference]: Without dead ends: 111965 [2021-07-09 16:21:38,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111965 states. [2021-07-09 16:21:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111965 to 88725. [2021-07-09 16:21:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88725 states, 88723 states have (on average 2.6732301657969186) internal successors, (237177), 88724 states have internal predecessors, (237177), 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) [2021-07-09 16:21:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88725 states to 88725 states and 237177 transitions. [2021-07-09 16:21:40,946 INFO L78 Accepts]: Start accepts. Automaton has 88725 states and 237177 transitions. Word has length 374 [2021-07-09 16:21:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:40,947 INFO L482 AbstractCegarLoop]: Abstraction has 88725 states and 237177 transitions. [2021-07-09 16:21:40,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 88725 states and 237177 transitions. [2021-07-09 16:21:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:41,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:41,612 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:41,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 16:21:41,812 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1449013588, now seen corresponding path program 23 times [2021-07-09 16:21:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:41,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999983959] [2021-07-09 16:21:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:42,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999983959] [2021-07-09 16:21:42,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999983959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203056090] [2021-07-09 16:21:42,072 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:42,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:21:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203056090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:42,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:42,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774242077] [2021-07-09 16:21:42,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:42,817 INFO L87 Difference]: Start difference. First operand 88725 states and 237177 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:43,607 INFO L93 Difference]: Finished difference Result 113460 states and 300078 transitions. [2021-07-09 16:21:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:21:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:43,862 INFO L225 Difference]: With dead ends: 113460 [2021-07-09 16:21:43,862 INFO L226 Difference]: Without dead ends: 113460 [2021-07-09 16:21:43,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:21:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113460 states. [2021-07-09 16:21:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113460 to 91625. [2021-07-09 16:21:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 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) [2021-07-09 16:21:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-09 16:21:46,357 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-09 16:21:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:46,357 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-09 16:21:46,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-09 16:21:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:46,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:46,498 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:46,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:46,700 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1596681040, now seen corresponding path program 24 times [2021-07-09 16:21:46,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:46,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801219092] [2021-07-09 16:21:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:47,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:47,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801219092] [2021-07-09 16:21:47,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801219092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:47,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582358222] [2021-07-09 16:21:47,264 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:47,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:21:47,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:48,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582358222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:48,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:48,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:48,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403290904] [2021-07-09 16:21:48,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:48,080 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:48,954 INFO L93 Difference]: Finished difference Result 109560 states and 290274 transitions. [2021-07-09 16:21:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:49,189 INFO L225 Difference]: With dead ends: 109560 [2021-07-09 16:21:49,190 INFO L226 Difference]: Without dead ends: 109560 [2021-07-09 16:21:49,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:21:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109560 states. [2021-07-09 16:21:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109560 to 91625. [2021-07-09 16:21:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 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) [2021-07-09 16:21:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-09 16:21:51,443 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-09 16:21:51,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:51,444 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-09 16:21:51,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-09 16:21:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-09 16:21:51,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:51,585 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:51,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 16:21:51,802 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -49868844, now seen corresponding path program 25 times [2021-07-09 16:21:51,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:51,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029580819] [2021-07-09 16:21:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:21:52,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029580819] [2021-07-09 16:21:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029580819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055852551] [2021-07-09 16:21:52,353 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:21:52,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055852551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:52,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:52,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:21:52,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148850103] [2021-07-09 16:21:52,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:52,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:52,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:52,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:52,850 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:53,747 INFO L93 Difference]: Finished difference Result 104450 states and 277305 transitions. [2021-07-09 16:21:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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 374 [2021-07-09 16:21:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:53,985 INFO L225 Difference]: With dead ends: 104450 [2021-07-09 16:21:53,985 INFO L226 Difference]: Without dead ends: 104450 [2021-07-09 16:21:53,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104450 states. [2021-07-09 16:21:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104450 to 89465. [2021-07-09 16:21:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89465 states, 89463 states have (on average 2.6731050825480924) internal successors, (239144), 89464 states have internal predecessors, (239144), 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) [2021-07-09 16:21:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89465 states to 89465 states and 239144 transitions. [2021-07-09 16:21:56,304 INFO L78 Accepts]: Start accepts. Automaton has 89465 states and 239144 transitions. Word has length 374 [2021-07-09 16:21:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:56,304 INFO L482 AbstractCegarLoop]: Abstraction has 89465 states and 239144 transitions. [2021-07-09 16:21:56,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 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) [2021-07-09 16:21:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 89465 states and 239144 transitions. [2021-07-09 16:21:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-07-09 16:21:56,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:56,442 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2021-07-09 16:21:56,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 16:21:56,659 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1195549329, now seen corresponding path program 10 times [2021-07-09 16:21:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:56,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456209750] [2021-07-09 16:21:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:21:56,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:56,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456209750] [2021-07-09 16:21:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456209750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:56,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089692034] [2021-07-09 16:21:56,889 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:57,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:57,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:57,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:21:58,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089692034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:58,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:58,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-09 16:21:58,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146668733] [2021-07-09 16:21:58,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 16:21:58,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 16:21:58,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:21:58,189 INFO L87 Difference]: Start difference. First operand 89465 states and 239144 transitions. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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) [2021-07-09 16:21:58,878 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 16:21:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:59,133 INFO L93 Difference]: Finished difference Result 101502 states and 269889 transitions. [2021-07-09 16:21:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:21:59,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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 404 [2021-07-09 16:21:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:59,351 INFO L225 Difference]: With dead ends: 101502 [2021-07-09 16:21:59,352 INFO L226 Difference]: Without dead ends: 101502 [2021-07-09 16:21:59,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:21:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101502 states. [2021-07-09 16:22:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101502 to 93860. [2021-07-09 16:22:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93860 states, 93858 states have (on average 2.6721856421402546) internal successors, (250806), 93859 states have internal predecessors, (250806), 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) [2021-07-09 16:22:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93860 states to 93860 states and 250806 transitions. [2021-07-09 16:22:01,860 INFO L78 Accepts]: Start accepts. Automaton has 93860 states and 250806 transitions. Word has length 404 [2021-07-09 16:22:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:01,860 INFO L482 AbstractCegarLoop]: Abstraction has 93860 states and 250806 transitions. [2021-07-09 16:22:01,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 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) [2021-07-09 16:22:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93860 states and 250806 transitions. [2021-07-09 16:22:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-09 16:22:02,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:02,010 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:02,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 16:22:02,229 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash 138077518, now seen corresponding path program 19 times [2021-07-09 16:22:02,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:02,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745036206] [2021-07-09 16:22:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:22:02,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745036206] [2021-07-09 16:22:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745036206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:02,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614976459] [2021-07-09 16:22:02,388 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:02,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:22:03,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614976459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:03,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:03,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:22:03,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168311618] [2021-07-09 16:22:03,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:03,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:03,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:03,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:03,333 INFO L87 Difference]: Start difference. First operand 93860 states and 250806 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:04,130 INFO L93 Difference]: Finished difference Result 142070 states and 376080 transitions. [2021-07-09 16:22:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:22:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-07-09 16:22:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:04,437 INFO L225 Difference]: With dead ends: 142070 [2021-07-09 16:22:04,437 INFO L226 Difference]: Without dead ends: 142070 [2021-07-09 16:22:04,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:22:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142070 states. [2021-07-09 16:22:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142070 to 90700. [2021-07-09 16:22:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90700 states, 90698 states have (on average 2.671150411254934) internal successors, (242268), 90699 states have internal predecessors, (242268), 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) [2021-07-09 16:22:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90700 states to 90700 states and 242268 transitions. [2021-07-09 16:22:07,263 INFO L78 Accepts]: Start accepts. Automaton has 90700 states and 242268 transitions. Word has length 407 [2021-07-09 16:22:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:07,263 INFO L482 AbstractCegarLoop]: Abstraction has 90700 states and 242268 transitions. [2021-07-09 16:22:07,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90700 states and 242268 transitions. [2021-07-09 16:22:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-09 16:22:07,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:07,419 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:07,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 16:22:07,633 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -802515258, now seen corresponding path program 20 times [2021-07-09 16:22:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:07,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667304025] [2021-07-09 16:22:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:22:07,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:07,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667304025] [2021-07-09 16:22:07,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667304025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:07,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851755283] [2021-07-09 16:22:07,759 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:07,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:08,473 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:22:08,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851755283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:08,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:08,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:08,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757444098] [2021-07-09 16:22:08,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:08,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:08,528 INFO L87 Difference]: Start difference. First operand 90700 states and 242268 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:09,136 INFO L93 Difference]: Finished difference Result 125225 states and 331936 transitions. [2021-07-09 16:22:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-07-09 16:22:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:09,579 INFO L225 Difference]: With dead ends: 125225 [2021-07-09 16:22:09,580 INFO L226 Difference]: Without dead ends: 125225 [2021-07-09 16:22:09,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125225 states. [2021-07-09 16:22:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125225 to 92520. [2021-07-09 16:22:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92520 states, 92518 states have (on average 2.67179359692168) internal successors, (247189), 92519 states have internal predecessors, (247189), 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) [2021-07-09 16:22:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92520 states to 92520 states and 247189 transitions. [2021-07-09 16:22:11,885 INFO L78 Accepts]: Start accepts. Automaton has 92520 states and 247189 transitions. Word has length 407 [2021-07-09 16:22:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:11,885 INFO L482 AbstractCegarLoop]: Abstraction has 92520 states and 247189 transitions. [2021-07-09 16:22:11,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 92520 states and 247189 transitions. [2021-07-09 16:22:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-09 16:22:12,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:12,035 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:12,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:12,252 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1233476004, now seen corresponding path program 21 times [2021-07-09 16:22:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:12,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196394907] [2021-07-09 16:22:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:22:12,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:12,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196394907] [2021-07-09 16:22:12,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196394907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98113699] [2021-07-09 16:22:12,705 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:13,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:22:13,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:22:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98113699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:13,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217789823] [2021-07-09 16:22:13,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:13,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:13,398 INFO L87 Difference]: Start difference. First operand 92520 states and 247189 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:14,175 INFO L93 Difference]: Finished difference Result 130760 states and 346823 transitions. [2021-07-09 16:22:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-07-09 16:22:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:14,459 INFO L225 Difference]: With dead ends: 130760 [2021-07-09 16:22:14,460 INFO L226 Difference]: Without dead ends: 130760 [2021-07-09 16:22:14,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130760 states. [2021-07-09 16:22:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130760 to 94680. [2021-07-09 16:22:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94680 states, 94678 states have (on average 2.6732398234014236) internal successors, (253097), 94679 states have internal predecessors, (253097), 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) [2021-07-09 16:22:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94680 states to 94680 states and 253097 transitions. [2021-07-09 16:22:17,218 INFO L78 Accepts]: Start accepts. Automaton has 94680 states and 253097 transitions. Word has length 407 [2021-07-09 16:22:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:17,219 INFO L482 AbstractCegarLoop]: Abstraction has 94680 states and 253097 transitions. [2021-07-09 16:22:17,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94680 states and 253097 transitions. [2021-07-09 16:22:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-09 16:22:17,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:17,368 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:17,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 16:22:17,585 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash 108197126, now seen corresponding path program 22 times [2021-07-09 16:22:17,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503478783] [2021-07-09 16:22:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:22:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503478783] [2021-07-09 16:22:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503478783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272549627] [2021-07-09 16:22:17,731 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:18,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:18,857 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:22:18,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272549627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:18,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:18,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:18,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693426263] [2021-07-09 16:22:18,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:18,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:18,994 INFO L87 Difference]: Start difference. First operand 94680 states and 253097 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:19,856 INFO L93 Difference]: Finished difference Result 131870 states and 349283 transitions. [2021-07-09 16:22:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:19,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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 407 [2021-07-09 16:22:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:20,182 INFO L225 Difference]: With dead ends: 131870 [2021-07-09 16:22:20,182 INFO L226 Difference]: Without dead ends: 131870 [2021-07-09 16:22:20,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131870 states. [2021-07-09 16:22:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131870 to 102420. [2021-07-09 16:22:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102420 states, 102418 states have (on average 2.676424066082134) internal successors, (274114), 102419 states have internal predecessors, (274114), 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) [2021-07-09 16:22:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102420 states to 102420 states and 274114 transitions. [2021-07-09 16:22:23,630 INFO L78 Accepts]: Start accepts. Automaton has 102420 states and 274114 transitions. Word has length 407 [2021-07-09 16:22:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:23,631 INFO L482 AbstractCegarLoop]: Abstraction has 102420 states and 274114 transitions. [2021-07-09 16:22:23,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 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) [2021-07-09 16:22:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 102420 states and 274114 transitions. [2021-07-09 16:22:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:23,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:23,816 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:24,029 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1206991637, now seen corresponding path program 23 times [2021-07-09 16:22:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392195025] [2021-07-09 16:22:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:24,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392195025] [2021-07-09 16:22:24,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392195025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994560114] [2021-07-09 16:22:24,182 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:24,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:22:24,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:24,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:25,344 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:25,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994560114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:25,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:25,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118870038] [2021-07-09 16:22:25,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:25,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:25,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:25,393 INFO L87 Difference]: Start difference. First operand 102420 states and 274114 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:26,476 INFO L93 Difference]: Finished difference Result 135700 states and 360529 transitions. [2021-07-09 16:22:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:26,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:26,786 INFO L225 Difference]: With dead ends: 135700 [2021-07-09 16:22:26,786 INFO L226 Difference]: Without dead ends: 135700 [2021-07-09 16:22:26,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:22:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135700 states. [2021-07-09 16:22:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135700 to 98780. [2021-07-09 16:22:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 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) [2021-07-09 16:22:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-07-09 16:22:29,431 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-07-09 16:22:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:29,431 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-07-09 16:22:29,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-07-09 16:22:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:30,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:30,227 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:30,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 16:22:30,444 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:30,444 INFO L82 PathProgramCache]: Analyzing trace with hash 449938573, now seen corresponding path program 24 times [2021-07-09 16:22:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895107317] [2021-07-09 16:22:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:30,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:30,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895107317] [2021-07-09 16:22:30,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895107317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:30,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894884732] [2021-07-09 16:22:30,606 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:30,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:22:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:31,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894884732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:31,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:31,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:31,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057101093] [2021-07-09 16:22:31,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:31,390 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:32,559 INFO L93 Difference]: Finished difference Result 152985 states and 407630 transitions. [2021-07-09 16:22:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:22:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:33,325 INFO L225 Difference]: With dead ends: 152985 [2021-07-09 16:22:33,325 INFO L226 Difference]: Without dead ends: 152985 [2021-07-09 16:22:33,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152985 states. [2021-07-09 16:22:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152985 to 98780. [2021-07-09 16:22:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 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) [2021-07-09 16:22:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-07-09 16:22:36,738 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-07-09 16:22:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:36,739 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-07-09 16:22:36,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-07-09 16:22:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:36,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:36,897 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:37,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:37,111 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -675340305, now seen corresponding path program 25 times [2021-07-09 16:22:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:37,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629443023] [2021-07-09 16:22:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:37,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629443023] [2021-07-09 16:22:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629443023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256291319] [2021-07-09 16:22:37,285 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:37,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:38,111 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:38,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256291319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:38,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:38,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:38,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903771197] [2021-07-09 16:22:38,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:38,256 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:39,259 INFO L93 Difference]: Finished difference Result 132670 states and 352212 transitions. [2021-07-09 16:22:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:22:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:39,550 INFO L225 Difference]: With dead ends: 132670 [2021-07-09 16:22:39,550 INFO L226 Difference]: Without dead ends: 132670 [2021-07-09 16:22:39,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132670 states. [2021-07-09 16:22:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132670 to 101940. [2021-07-09 16:22:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 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) [2021-07-09 16:22:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-07-09 16:22:42,288 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-07-09 16:22:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:42,289 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-07-09 16:22:42,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-07-09 16:22:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:42,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:42,867 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:43,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 16:22:43,084 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash -525924331, now seen corresponding path program 26 times [2021-07-09 16:22:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:43,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138555789] [2021-07-09 16:22:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:43,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138555789] [2021-07-09 16:22:43,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138555789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:43,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254341096] [2021-07-09 16:22:43,224 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:43,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:43,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:43,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:43,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254341096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:43,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:43,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:43,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004199967] [2021-07-09 16:22:43,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:43,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:43,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:43,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:43,769 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:44,696 INFO L93 Difference]: Finished difference Result 156300 states and 415942 transitions. [2021-07-09 16:22:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:22:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:45,481 INFO L225 Difference]: With dead ends: 156300 [2021-07-09 16:22:45,482 INFO L226 Difference]: Without dead ends: 156300 [2021-07-09 16:22:45,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=325, Invalid=1007, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156300 states. [2021-07-09 16:22:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156300 to 101940. [2021-07-09 16:22:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 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) [2021-07-09 16:22:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-07-09 16:22:48,743 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-07-09 16:22:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:48,743 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-07-09 16:22:48,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-07-09 16:22:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:48,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:48,924 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:49,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:49,141 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1651203209, now seen corresponding path program 27 times [2021-07-09 16:22:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534057906] [2021-07-09 16:22:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:49,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534057906] [2021-07-09 16:22:49,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534057906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685800860] [2021-07-09 16:22:49,309 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:22:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:50,231 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685800860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:50,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:50,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:50,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812196849] [2021-07-09 16:22:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:50,256 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:51,227 INFO L93 Difference]: Finished difference Result 161260 states and 429321 transitions. [2021-07-09 16:22:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:22:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:51,619 INFO L225 Difference]: With dead ends: 161260 [2021-07-09 16:22:51,619 INFO L226 Difference]: Without dead ends: 161260 [2021-07-09 16:22:51,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:22:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161260 states. [2021-07-09 16:22:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161260 to 103760. [2021-07-09 16:22:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103760 states, 103758 states have (on average 2.6767189036026138) internal successors, (277731), 103759 states have internal predecessors, (277731), 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) [2021-07-09 16:22:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103760 states to 103760 states and 277731 transitions. [2021-07-09 16:22:54,734 INFO L78 Accepts]: Start accepts. Automaton has 103760 states and 277731 transitions. Word has length 408 [2021-07-09 16:22:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:54,734 INFO L482 AbstractCegarLoop]: Abstraction has 103760 states and 277731 transitions. [2021-07-09 16:22:54,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 103760 states and 277731 transitions. [2021-07-09 16:22:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:22:54,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:54,911 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:22:55,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 16:22:55,125 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:55,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1490861269, now seen corresponding path program 28 times [2021-07-09 16:22:55,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:55,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991128826] [2021-07-09 16:22:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991128826] [2021-07-09 16:22:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991128826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850202610] [2021-07-09 16:22:55,267 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:55,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:56,241 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:22:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850202610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:56,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:56,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:56,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89044611] [2021-07-09 16:22:56,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:56,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:56,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:56,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:56,512 INFO L87 Difference]: Start difference. First operand 103760 states and 277731 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:22:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:57,336 INFO L93 Difference]: Finished difference Result 133775 states and 354173 transitions. [2021-07-09 16:22:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:22:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:22:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:57,623 INFO L225 Difference]: With dead ends: 133775 [2021-07-09 16:22:57,624 INFO L226 Difference]: Without dead ends: 133775 [2021-07-09 16:22:57,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:22:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133775 states. [2021-07-09 16:22:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133775 to 104020. [2021-07-09 16:22:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 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) [2021-07-09 16:23:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-07-09 16:23:00,390 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-07-09 16:23:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:00,390 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-07-09 16:23:00,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-07-09 16:23:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:00,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:00,747 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:00,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:00,965 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:00,966 INFO L82 PathProgramCache]: Analyzing trace with hash -31418483, now seen corresponding path program 29 times [2021-07-09 16:23:00,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:00,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494449631] [2021-07-09 16:23:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:01,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:01,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494449631] [2021-07-09 16:23:01,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494449631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:01,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786269347] [2021-07-09 16:23:01,114 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:01,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:23:01,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:01,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:01,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786269347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:01,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:01,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067001783] [2021-07-09 16:23:01,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:01,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:01,905 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:02,840 INFO L93 Difference]: Finished difference Result 154635 states and 411610 transitions. [2021-07-09 16:23:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:23:02,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:03,611 INFO L225 Difference]: With dead ends: 154635 [2021-07-09 16:23:03,612 INFO L226 Difference]: Without dead ends: 154635 [2021-07-09 16:23:03,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154635 states. [2021-07-09 16:23:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154635 to 105100. [2021-07-09 16:23:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105100 states, 105098 states have (on average 2.677006222763516) internal successors, (281348), 105099 states have internal predecessors, (281348), 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) [2021-07-09 16:23:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105100 states to 105100 states and 281348 transitions. [2021-07-09 16:23:07,065 INFO L78 Accepts]: Start accepts. Automaton has 105100 states and 281348 transitions. Word has length 408 [2021-07-09 16:23:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:07,065 INFO L482 AbstractCegarLoop]: Abstraction has 105100 states and 281348 transitions. [2021-07-09 16:23:07,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 105100 states and 281348 transitions. [2021-07-09 16:23:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:07,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:07,250 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:07,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 16:23:07,467 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1156697361, now seen corresponding path program 30 times [2021-07-09 16:23:07,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:07,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321897625] [2021-07-09 16:23:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:07,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321897625] [2021-07-09 16:23:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321897625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564022498] [2021-07-09 16:23:07,610 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:07,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:23:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:08,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564022498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:08,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:08,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:08,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39626846] [2021-07-09 16:23:08,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:08,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:08,879 INFO L87 Difference]: Start difference. First operand 105100 states and 281348 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:10,028 INFO L93 Difference]: Finished difference Result 165320 states and 440234 transitions. [2021-07-09 16:23:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:23:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:10,418 INFO L225 Difference]: With dead ends: 165320 [2021-07-09 16:23:10,418 INFO L226 Difference]: Without dead ends: 165320 [2021-07-09 16:23:10,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:23:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165320 states. [2021-07-09 16:23:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165320 to 104020. [2021-07-09 16:23:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 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) [2021-07-09 16:23:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-07-09 16:23:13,845 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-07-09 16:23:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:13,845 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-07-09 16:23:13,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-07-09 16:23:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:14,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:14,049 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:14,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 16:23:14,268 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1985367117, now seen corresponding path program 31 times [2021-07-09 16:23:14,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:14,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529857411] [2021-07-09 16:23:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:14,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:14,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529857411] [2021-07-09 16:23:14,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529857411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:14,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770291297] [2021-07-09 16:23:14,404 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:14,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:15,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770291297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:15,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:15,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372394878] [2021-07-09 16:23:15,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:15,262 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:16,147 INFO L93 Difference]: Finished difference Result 160275 states and 426785 transitions. [2021-07-09 16:23:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:23:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:16,497 INFO L225 Difference]: With dead ends: 160275 [2021-07-09 16:23:16,497 INFO L226 Difference]: Without dead ends: 160275 [2021-07-09 16:23:16,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:23:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160275 states. [2021-07-09 16:23:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160275 to 109480. [2021-07-09 16:23:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109480 states, 109478 states have (on average 2.677770876340452) internal successors, (293157), 109479 states have internal predecessors, (293157), 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) [2021-07-09 16:23:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109480 states to 109480 states and 293157 transitions. [2021-07-09 16:23:20,002 INFO L78 Accepts]: Start accepts. Automaton has 109480 states and 293157 transitions. Word has length 408 [2021-07-09 16:23:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:20,002 INFO L482 AbstractCegarLoop]: Abstraction has 109480 states and 293157 transitions. [2021-07-09 16:23:20,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 109480 states and 293157 transitions. [2021-07-09 16:23:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:20,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:20,775 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:20,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 16:23:20,992 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1849276881, now seen corresponding path program 32 times [2021-07-09 16:23:20,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:20,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581981189] [2021-07-09 16:23:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:21,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:21,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581981189] [2021-07-09 16:23:21,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581981189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:21,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129538618] [2021-07-09 16:23:21,144 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:21,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:23:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:21,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129538618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:21,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:21,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:21,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85432841] [2021-07-09 16:23:21,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:21,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:21,687 INFO L87 Difference]: Start difference. First operand 109480 states and 293157 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:22,518 INFO L93 Difference]: Finished difference Result 135850 states and 359912 transitions. [2021-07-09 16:23:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:23:22,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:22,813 INFO L225 Difference]: With dead ends: 135850 [2021-07-09 16:23:22,813 INFO L226 Difference]: Without dead ends: 135850 [2021-07-09 16:23:22,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:23:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135850 states. [2021-07-09 16:23:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135850 to 114800. [2021-07-09 16:23:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 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) [2021-07-09 16:23:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-07-09 16:23:25,740 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-07-09 16:23:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:25,741 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-07-09 16:23:25,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-07-09 16:23:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:25,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:25,956 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:26,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:26,173 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash 874976533, now seen corresponding path program 33 times [2021-07-09 16:23:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:26,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923187382] [2021-07-09 16:23:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:23:27,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923187382] [2021-07-09 16:23:27,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923187382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892749833] [2021-07-09 16:23:27,081 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:27,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:23:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:27,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:27,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892749833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:27,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:27,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:23:27,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370576128] [2021-07-09 16:23:27,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:27,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:27,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:27,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:27,846 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:28,758 INFO L93 Difference]: Finished difference Result 150170 states and 399764 transitions. [2021-07-09 16:23:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:23:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:29,119 INFO L225 Difference]: With dead ends: 150170 [2021-07-09 16:23:29,119 INFO L226 Difference]: Without dead ends: 150170 [2021-07-09 16:23:29,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:23:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150170 states. [2021-07-09 16:23:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150170 to 114800. [2021-07-09 16:23:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 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) [2021-07-09 16:23:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-07-09 16:23:32,453 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-07-09 16:23:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:32,453 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-07-09 16:23:32,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-07-09 16:23:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:32,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:32,653 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:32,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:32,871 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash -250302345, now seen corresponding path program 34 times [2021-07-09 16:23:32,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:32,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090469064] [2021-07-09 16:23:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:23:33,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090469064] [2021-07-09 16:23:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090469064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295385145] [2021-07-09 16:23:33,027 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:33,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:34,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295385145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:34,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:34,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:23:34,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888511093] [2021-07-09 16:23:34,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:34,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:34,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:34,114 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:35,238 INFO L93 Difference]: Finished difference Result 157890 states and 420467 transitions. [2021-07-09 16:23:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:23:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:35,614 INFO L225 Difference]: With dead ends: 157890 [2021-07-09 16:23:35,614 INFO L226 Difference]: Without dead ends: 157890 [2021-07-09 16:23:35,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:23:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157890 states. [2021-07-09 16:23:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157890 to 113720. [2021-07-09 16:23:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113720 states, 113718 states have (on average 2.6789866160150546) internal successors, (304649), 113719 states have internal predecessors, (304649), 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) [2021-07-09 16:23:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113720 states to 113720 states and 304649 transitions. [2021-07-09 16:23:39,046 INFO L78 Accepts]: Start accepts. Automaton has 113720 states and 304649 transitions. Word has length 408 [2021-07-09 16:23:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:39,046 INFO L482 AbstractCegarLoop]: Abstraction has 113720 states and 304649 transitions. [2021-07-09 16:23:39,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 113720 states and 304649 transitions. [2021-07-09 16:23:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:39,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:39,240 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:39,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:39,457 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:39,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1403205163, now seen corresponding path program 35 times [2021-07-09 16:23:39,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:39,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922746671] [2021-07-09 16:23:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:23:39,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:39,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922746671] [2021-07-09 16:23:39,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922746671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:39,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194835119] [2021-07-09 16:23:39,667 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:40,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:23:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194835119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:40,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:40,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:23:40,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114669005] [2021-07-09 16:23:40,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:40,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:40,678 INFO L87 Difference]: Start difference. First operand 113720 states and 304649 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:41,592 INFO L93 Difference]: Finished difference Result 160390 states and 426475 transitions. [2021-07-09 16:23:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:23:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:41,950 INFO L225 Difference]: With dead ends: 160390 [2021-07-09 16:23:41,951 INFO L226 Difference]: Without dead ends: 160390 [2021-07-09 16:23:41,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:23:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160390 states. [2021-07-09 16:23:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160390 to 117360. [2021-07-09 16:23:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117360 states, 117358 states have (on average 2.6797576645818775) internal successors, (314491), 117359 states have internal predecessors, (314491), 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) [2021-07-09 16:23:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117360 states to 117360 states and 314491 transitions. [2021-07-09 16:23:45,286 INFO L78 Accepts]: Start accepts. Automaton has 117360 states and 314491 transitions. Word has length 408 [2021-07-09 16:23:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:45,286 INFO L482 AbstractCegarLoop]: Abstraction has 117360 states and 314491 transitions. [2021-07-09 16:23:45,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 117360 states and 314491 transitions. [2021-07-09 16:23:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:45,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:45,906 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:46,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 16:23:46,121 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash -942881865, now seen corresponding path program 36 times [2021-07-09 16:23:46,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:46,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546786676] [2021-07-09 16:23:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:23:46,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:46,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546786676] [2021-07-09 16:23:46,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546786676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:46,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78562837] [2021-07-09 16:23:46,272 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:46,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:23:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78562837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:23:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094182778] [2021-07-09 16:23:47,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:47,053 INFO L87 Difference]: Start difference. First operand 117360 states and 314491 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:48,291 INFO L93 Difference]: Finished difference Result 154525 states and 410727 transitions. [2021-07-09 16:23:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:23:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:48,632 INFO L225 Difference]: With dead ends: 154525 [2021-07-09 16:23:48,632 INFO L226 Difference]: Without dead ends: 154525 [2021-07-09 16:23:48,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154525 states. [2021-07-09 16:23:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154525 to 120260. [2021-07-09 16:23:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120260 states, 120258 states have (on average 2.680620000332618) internal successors, (322366), 120259 states have internal predecessors, (322366), 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) [2021-07-09 16:23:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120260 states to 120260 states and 322366 transitions. [2021-07-09 16:23:52,043 INFO L78 Accepts]: Start accepts. Automaton has 120260 states and 322366 transitions. Word has length 408 [2021-07-09 16:23:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:52,043 INFO L482 AbstractCegarLoop]: Abstraction has 120260 states and 322366 transitions. [2021-07-09 16:23:52,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 120260 states and 322366 transitions. [2021-07-09 16:23:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-09 16:23:52,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:52,273 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:23:52,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:52,492 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1537339029, now seen corresponding path program 37 times [2021-07-09 16:23:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:52,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899131490] [2021-07-09 16:23:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:23:52,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:52,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899131490] [2021-07-09 16:23:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899131490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:52,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051239408] [2021-07-09 16:23:52,641 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:23:53,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051239408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:53,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:53,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:23:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345064065] [2021-07-09 16:23:53,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:53,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:53,772 INFO L87 Difference]: Start difference. First operand 120260 states and 322366 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:54,704 INFO L93 Difference]: Finished difference Result 144180 states and 382907 transitions. [2021-07-09 16:23:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:23:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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 [2021-07-09 16:23:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:55,023 INFO L225 Difference]: With dead ends: 144180 [2021-07-09 16:23:55,023 INFO L226 Difference]: Without dead ends: 144180 [2021-07-09 16:23:55,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144180 states. [2021-07-09 16:23:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144180 to 122420. [2021-07-09 16:23:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 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) [2021-07-09 16:23:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-07-09 16:23:58,950 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 408 [2021-07-09 16:23:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:58,951 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-07-09 16:23:58,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 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) [2021-07-09 16:23:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-07-09 16:23:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:23:59,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:59,734 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:59,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:59,952 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash -540359732, now seen corresponding path program 26 times [2021-07-09 16:23:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:59,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041716937] [2021-07-09 16:23:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:00,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:00,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041716937] [2021-07-09 16:24:00,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041716937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:00,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613485950] [2021-07-09 16:24:00,123 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:00,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613485950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392290858] [2021-07-09 16:24:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:00,668 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:02,061 INFO L93 Difference]: Finished difference Result 148110 states and 394281 transitions. [2021-07-09 16:24:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:24:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:02,390 INFO L225 Difference]: With dead ends: 148110 [2021-07-09 16:24:02,390 INFO L226 Difference]: Without dead ends: 148110 [2021-07-09 16:24:02,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:24:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148110 states. [2021-07-09 16:24:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148110 to 121340. [2021-07-09 16:24:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 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) [2021-07-09 16:24:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-07-09 16:24:05,567 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-07-09 16:24:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:05,568 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-07-09 16:24:05,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-07-09 16:24:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:05,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:05,773 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:05,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:05,990 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1824663608, now seen corresponding path program 27 times [2021-07-09 16:24:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:05,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506073811] [2021-07-09 16:24:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:06,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:06,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506073811] [2021-07-09 16:24:06,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506073811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:06,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283781931] [2021-07-09 16:24:06,486 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:07,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:24:07,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:07,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283781931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:07,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:07,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:07,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25074236] [2021-07-09 16:24:07,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:07,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:07,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:07,460 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:08,472 INFO L93 Difference]: Finished difference Result 152100 states and 404453 transitions. [2021-07-09 16:24:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:24:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:08,810 INFO L225 Difference]: With dead ends: 152100 [2021-07-09 16:24:08,810 INFO L226 Difference]: Without dead ends: 152100 [2021-07-09 16:24:08,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:24:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152100 states. [2021-07-09 16:24:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152100 to 121340. [2021-07-09 16:24:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 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) [2021-07-09 16:24:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-07-09 16:24:13,222 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-07-09 16:24:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-07-09 16:24:13,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-07-09 16:24:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:13,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:13,659 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:13,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 16:24:13,878 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1918198348, now seen corresponding path program 28 times [2021-07-09 16:24:13,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:13,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655905843] [2021-07-09 16:24:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:14,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655905843] [2021-07-09 16:24:14,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655905843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:14,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725973867] [2021-07-09 16:24:14,182 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:14,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:15,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725973867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:15,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:15,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:15,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900506354] [2021-07-09 16:24:15,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:15,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:15,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:15,444 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:15,721 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:24:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:16,722 INFO L93 Difference]: Finished difference Result 155890 states and 414296 transitions. [2021-07-09 16:24:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:24:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:17,058 INFO L225 Difference]: With dead ends: 155890 [2021-07-09 16:24:17,058 INFO L226 Difference]: Without dead ends: 155890 [2021-07-09 16:24:17,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:24:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155890 states. [2021-07-09 16:24:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155890 to 119520. [2021-07-09 16:24:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119520 states, 119518 states have (on average 2.680759383523821) internal successors, (320399), 119519 states have internal predecessors, (320399), 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) [2021-07-09 16:24:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119520 states to 119520 states and 320399 transitions. [2021-07-09 16:24:20,023 INFO L78 Accepts]: Start accepts. Automaton has 119520 states and 320399 transitions. Word has length 409 [2021-07-09 16:24:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:20,023 INFO L482 AbstractCegarLoop]: Abstraction has 119520 states and 320399 transitions. [2021-07-09 16:24:20,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 119520 states and 320399 transitions. [2021-07-09 16:24:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:20,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:20,241 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:20,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:20,456 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1222289736, now seen corresponding path program 29 times [2021-07-09 16:24:20,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:20,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217387893] [2021-07-09 16:24:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:20,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217387893] [2021-07-09 16:24:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217387893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:20,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861369864] [2021-07-09 16:24:20,639 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:21,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:24:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:21,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861369864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:21,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:21,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298639543] [2021-07-09 16:24:21,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:21,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:21,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:21,769 INFO L87 Difference]: Start difference. First operand 119520 states and 320399 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:22,735 INFO L93 Difference]: Finished difference Result 153090 states and 406682 transitions. [2021-07-09 16:24:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:24:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:23,072 INFO L225 Difference]: With dead ends: 153090 [2021-07-09 16:24:23,073 INFO L226 Difference]: Without dead ends: 153090 [2021-07-09 16:24:23,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:24:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153090 states. [2021-07-09 16:24:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153090 to 122420. [2021-07-09 16:24:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 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) [2021-07-09 16:24:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-07-09 16:24:26,640 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 409 [2021-07-09 16:24:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:26,640 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-07-09 16:24:26,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-07-09 16:24:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:26,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:26,854 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:27,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 16:24:27,069 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1277484852, now seen corresponding path program 30 times [2021-07-09 16:24:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:27,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165087174] [2021-07-09 16:24:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:27,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:27,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165087174] [2021-07-09 16:24:27,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165087174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294942632] [2021-07-09 16:24:27,239 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:27,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:24:27,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:28,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294942632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:28,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:28,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564894443] [2021-07-09 16:24:28,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:28,244 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:29,357 INFO L93 Difference]: Finished difference Result 151720 states and 403302 transitions. [2021-07-09 16:24:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:24:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:29,699 INFO L225 Difference]: With dead ends: 151720 [2021-07-09 16:24:29,700 INFO L226 Difference]: Without dead ends: 151720 [2021-07-09 16:24:29,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=473, Invalid=1249, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:24:29,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151720 states. [2021-07-09 16:24:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151720 to 125320. [2021-07-09 16:24:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125320 states, 125318 states have (on average 2.6823680556663847) internal successors, (336149), 125319 states have internal predecessors, (336149), 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) [2021-07-09 16:24:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125320 states to 125320 states and 336149 transitions. [2021-07-09 16:24:33,229 INFO L78 Accepts]: Start accepts. Automaton has 125320 states and 336149 transitions. Word has length 409 [2021-07-09 16:24:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:33,229 INFO L482 AbstractCegarLoop]: Abstraction has 125320 states and 336149 transitions. [2021-07-09 16:24:33,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 125320 states and 336149 transitions. [2021-07-09 16:24:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:34,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:34,266 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:34,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:34,484 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1129817400, now seen corresponding path program 31 times [2021-07-09 16:24:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:34,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259100818] [2021-07-09 16:24:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:34,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259100818] [2021-07-09 16:24:34,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259100818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:34,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178712220] [2021-07-09 16:24:34,655 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178712220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229756576] [2021-07-09 16:24:35,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:35,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:35,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:35,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:35,194 INFO L87 Difference]: Start difference. First operand 125320 states and 336149 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:36,708 INFO L93 Difference]: Finished difference Result 150655 states and 399845 transitions. [2021-07-09 16:24:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:24:36,708 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:37,030 INFO L225 Difference]: With dead ends: 150655 [2021-07-09 16:24:37,030 INFO L226 Difference]: Without dead ends: 150655 [2021-07-09 16:24:37,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:24:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150655 states. [2021-07-09 16:24:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150655 to 124240. [2021-07-09 16:24:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 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) [2021-07-09 16:24:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-09 16:24:40,438 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-09 16:24:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:40,438 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-09 16:24:40,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-09 16:24:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:40,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:40,654 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:40,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:40,872 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1518600012, now seen corresponding path program 32 times [2021-07-09 16:24:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:40,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407914456] [2021-07-09 16:24:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:41,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:41,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407914456] [2021-07-09 16:24:41,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407914456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:41,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683058441] [2021-07-09 16:24:41,678 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:41,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:41,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:41,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683058441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:42,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184877970] [2021-07-09 16:24:42,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:42,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:42,225 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:43,196 INFO L93 Difference]: Finished difference Result 145070 states and 385658 transitions. [2021-07-09 16:24:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:24:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:43,517 INFO L225 Difference]: With dead ends: 145070 [2021-07-09 16:24:43,517 INFO L226 Difference]: Without dead ends: 145070 [2021-07-09 16:24:43,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 885.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:24:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145070 states. [2021-07-09 16:24:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145070 to 124240. [2021-07-09 16:24:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 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) [2021-07-09 16:24:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-09 16:24:46,905 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-09 16:24:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:46,905 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-09 16:24:46,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-09 16:24:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-09 16:24:47,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:47,765 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:47,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:47,982 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1199500360, now seen corresponding path program 33 times [2021-07-09 16:24:47,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:47,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946277553] [2021-07-09 16:24:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1383 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:24:48,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946277553] [2021-07-09 16:24:48,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946277553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107754304] [2021-07-09 16:24:48,313 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:48,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:24:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:24:49,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107754304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:49,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:49,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-09 16:24:49,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756917405] [2021-07-09 16:24:49,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:49,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:49,131 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:50,037 INFO L93 Difference]: Finished difference Result 138275 states and 368306 transitions. [2021-07-09 16:24:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:24:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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 409 [2021-07-09 16:24:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:50,532 INFO L225 Difference]: With dead ends: 138275 [2021-07-09 16:24:50,532 INFO L226 Difference]: Without dead ends: 138275 [2021-07-09 16:24:50,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:24:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138275 states. [2021-07-09 16:24:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138275 to 121000. [2021-07-09 16:24:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121000 states, 120998 states have (on average 2.6804823220218514) internal successors, (324333), 120999 states have internal predecessors, (324333), 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) [2021-07-09 16:24:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121000 states to 121000 states and 324333 transitions. [2021-07-09 16:24:53,687 INFO L78 Accepts]: Start accepts. Automaton has 121000 states and 324333 transitions. Word has length 409 [2021-07-09 16:24:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:53,688 INFO L482 AbstractCegarLoop]: Abstraction has 121000 states and 324333 transitions. [2021-07-09 16:24:53,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2021-07-09 16:24:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 121000 states and 324333 transitions. [2021-07-09 16:24:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-07-09 16:24:53,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:53,912 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-07-09 16:24:54,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:54,125 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash 642031821, now seen corresponding path program 11 times [2021-07-09 16:24:54,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:54,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537892811] [2021-07-09 16:24:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:54,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537892811] [2021-07-09 16:24:54,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537892811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932246787] [2021-07-09 16:24:54,350 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:54,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 16:24:54,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:55,040 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:24:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932246787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 16:24:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289827676] [2021-07-09 16:24:55,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:24:55,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:24:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:24:55,291 INFO L87 Difference]: Start difference. First operand 121000 states and 324333 transitions. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2021-07-09 16:24:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:56,381 INFO L93 Difference]: Finished difference Result 134722 states and 359461 transitions. [2021-07-09 16:24:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:24:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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 439 [2021-07-09 16:24:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:56,669 INFO L225 Difference]: With dead ends: 134722 [2021-07-09 16:24:56,669 INFO L226 Difference]: Without dead ends: 134722 [2021-07-09 16:24:56,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:24:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134722 states. [2021-07-09 16:24:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134722 to 126475. [2021-07-09 16:24:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126475 states, 126473 states have (on average 2.6800107532833093) internal successors, (338949), 126474 states have internal predecessors, (338949), 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) [2021-07-09 16:24:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126475 states to 126475 states and 338949 transitions. [2021-07-09 16:24:59,966 INFO L78 Accepts]: Start accepts. Automaton has 126475 states and 338949 transitions. Word has length 439 [2021-07-09 16:24:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:59,967 INFO L482 AbstractCegarLoop]: Abstraction has 126475 states and 338949 transitions. [2021-07-09 16:24:59,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 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) [2021-07-09 16:24:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 126475 states and 338949 transitions. [2021-07-09 16:25:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:00,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:00,189 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:00,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:00,401 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1724136234, now seen corresponding path program 38 times [2021-07-09 16:25:00,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:00,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015398187] [2021-07-09 16:25:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:00,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015398187] [2021-07-09 16:25:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015398187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394411138] [2021-07-09 16:25:00,927 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:01,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:01,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:01,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394411138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:01,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:01,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:01,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469339261] [2021-07-09 16:25:01,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:01,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:01,500 INFO L87 Difference]: Start difference. First operand 126475 states and 338949 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:02,444 INFO L93 Difference]: Finished difference Result 177585 states and 471277 transitions. [2021-07-09 16:25:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:25:02,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:03,435 INFO L225 Difference]: With dead ends: 177585 [2021-07-09 16:25:03,436 INFO L226 Difference]: Without dead ends: 177585 [2021-07-09 16:25:03,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:25:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-07-09 16:25:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 123315. [2021-07-09 16:25:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123315 states, 123313 states have (on average 2.6794498552464057) internal successors, (330411), 123314 states have internal predecessors, (330411), 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) [2021-07-09 16:25:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123315 states to 123315 states and 330411 transitions. [2021-07-09 16:25:07,343 INFO L78 Accepts]: Start accepts. Automaton has 123315 states and 330411 transitions. Word has length 442 [2021-07-09 16:25:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:07,344 INFO L482 AbstractCegarLoop]: Abstraction has 123315 states and 330411 transitions. [2021-07-09 16:25:07,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 123315 states and 330411 transitions. [2021-07-09 16:25:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:08,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:08,200 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:08,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:08,417 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1630238286, now seen corresponding path program 39 times [2021-07-09 16:25:08,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:08,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329708456] [2021-07-09 16:25:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:08,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329708456] [2021-07-09 16:25:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329708456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:08,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489616774] [2021-07-09 16:25:08,557 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:08,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:25:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:09,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489616774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:09,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:09,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159446758] [2021-07-09 16:25:09,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:09,709 INFO L87 Difference]: Start difference. First operand 123315 states and 330411 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:10,742 INFO L93 Difference]: Finished difference Result 180470 states and 480926 transitions. [2021-07-09 16:25:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:11,144 INFO L225 Difference]: With dead ends: 180470 [2021-07-09 16:25:11,145 INFO L226 Difference]: Without dead ends: 180470 [2021-07-09 16:25:11,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:25:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180470 states. [2021-07-09 16:25:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180470 to 126215. [2021-07-09 16:25:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126215 states, 126213 states have (on average 2.680278576691783) internal successors, (338286), 126214 states have internal predecessors, (338286), 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) [2021-07-09 16:25:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126215 states to 126215 states and 338286 transitions. [2021-07-09 16:25:15,186 INFO L78 Accepts]: Start accepts. Automaton has 126215 states and 338286 transitions. Word has length 442 [2021-07-09 16:25:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:15,187 INFO L482 AbstractCegarLoop]: Abstraction has 126215 states and 338286 transitions. [2021-07-09 16:25:15,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 126215 states and 338286 transitions. [2021-07-09 16:25:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:15,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:15,413 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:15,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:15,631 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash -628737748, now seen corresponding path program 40 times [2021-07-09 16:25:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:15,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628177033] [2021-07-09 16:25:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:15,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:15,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628177033] [2021-07-09 16:25:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628177033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590966673] [2021-07-09 16:25:15,764 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:16,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590966673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:17,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548609272] [2021-07-09 16:25:17,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:17,218 INFO L87 Difference]: Start difference. First operand 126215 states and 338286 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:18,265 INFO L93 Difference]: Finished difference Result 177810 states and 473410 transitions. [2021-07-09 16:25:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:18,659 INFO L225 Difference]: With dead ends: 177810 [2021-07-09 16:25:18,659 INFO L226 Difference]: Without dead ends: 177810 [2021-07-09 16:25:18,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:25:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177810 states. [2021-07-09 16:25:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177810 to 129455. [2021-07-09 16:25:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129455 states, 129453 states have (on average 2.6816528006303444) internal successors, (347148), 129454 states have internal predecessors, (347148), 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) [2021-07-09 16:25:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129455 states to 129455 states and 347148 transitions. [2021-07-09 16:25:23,717 INFO L78 Accepts]: Start accepts. Automaton has 129455 states and 347148 transitions. Word has length 442 [2021-07-09 16:25:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:23,718 INFO L482 AbstractCegarLoop]: Abstraction has 129455 states and 347148 transitions. [2021-07-09 16:25:23,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 129455 states and 347148 transitions. [2021-07-09 16:25:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:23,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:23,983 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:24,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 16:25:24,202 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1754016626, now seen corresponding path program 41 times [2021-07-09 16:25:24,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:24,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944342346] [2021-07-09 16:25:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:24,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944342346] [2021-07-09 16:25:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944342346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387300392] [2021-07-09 16:25:24,484 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:24,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:25:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:24,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:25,250 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387300392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:25,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:25,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:25,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230911158] [2021-07-09 16:25:25,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:25,738 INFO L87 Difference]: Start difference. First operand 129455 states and 347148 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:26,747 INFO L93 Difference]: Finished difference Result 170990 states and 454159 transitions. [2021-07-09 16:25:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:27,123 INFO L225 Difference]: With dead ends: 170990 [2021-07-09 16:25:27,123 INFO L226 Difference]: Without dead ends: 170990 [2021-07-09 16:25:27,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:25:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170990 states. [2021-07-09 16:25:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170990 to 120495. [2021-07-09 16:25:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 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) [2021-07-09 16:25:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-07-09 16:25:31,338 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-07-09 16:25:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:31,339 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-07-09 16:25:31,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-07-09 16:25:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:31,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:31,599 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:31,817 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 242782678, now seen corresponding path program 42 times [2021-07-09 16:25:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238841941] [2021-07-09 16:25:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:25:31,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238841941] [2021-07-09 16:25:31,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238841941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930420694] [2021-07-09 16:25:31,963 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:32,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:25:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:33,009 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930420694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:33,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:33,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:25:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299673104] [2021-07-09 16:25:33,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:33,136 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:34,226 INFO L93 Difference]: Finished difference Result 170120 states and 452612 transitions. [2021-07-09 16:25:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:25:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:34,657 INFO L225 Difference]: With dead ends: 170120 [2021-07-09 16:25:34,658 INFO L226 Difference]: Without dead ends: 170120 [2021-07-09 16:25:34,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170120 states. [2021-07-09 16:25:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170120 to 119415. [2021-07-09 16:25:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119415 states, 119413 states have (on average 2.6789880498773164) internal successors, (319906), 119414 states have internal predecessors, (319906), 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) [2021-07-09 16:25:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119415 states to 119415 states and 319906 transitions. [2021-07-09 16:25:38,592 INFO L78 Accepts]: Start accepts. Automaton has 119415 states and 319906 transitions. Word has length 442 [2021-07-09 16:25:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:38,593 INFO L482 AbstractCegarLoop]: Abstraction has 119415 states and 319906 transitions. [2021-07-09 16:25:38,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 119415 states and 319906 transitions. [2021-07-09 16:25:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:38,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:38,853 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:39,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 16:25:39,071 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2016193356, now seen corresponding path program 43 times [2021-07-09 16:25:39,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:39,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528539335] [2021-07-09 16:25:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:25:39,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:39,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528539335] [2021-07-09 16:25:39,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528539335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:39,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784709487] [2021-07-09 16:25:39,238 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:40,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784709487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:40,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:40,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:25:40,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038571567] [2021-07-09 16:25:40,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:40,030 INFO L87 Difference]: Start difference. First operand 119415 states and 319906 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:41,148 INFO L93 Difference]: Finished difference Result 189795 states and 505902 transitions. [2021-07-09 16:25:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:25:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:41,695 INFO L225 Difference]: With dead ends: 189795 [2021-07-09 16:25:41,695 INFO L226 Difference]: Without dead ends: 189795 [2021-07-09 16:25:41,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:25:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189795 states. [2021-07-09 16:25:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189795 to 120495. [2021-07-09 16:25:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 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) [2021-07-09 16:25:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-07-09 16:25:45,680 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-07-09 16:25:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:45,680 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-07-09 16:25:45,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-07-09 16:25:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:45,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:45,883 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:46,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:46,100 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1153495062, now seen corresponding path program 44 times [2021-07-09 16:25:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:46,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019333486] [2021-07-09 16:25:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:46,679 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:25:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019333486] [2021-07-09 16:25:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019333486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569085798] [2021-07-09 16:25:46,738 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:46,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:47,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569085798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:47,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:47,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:25:47,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012276970] [2021-07-09 16:25:47,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:47,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:47,309 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:48,187 INFO L93 Difference]: Finished difference Result 163890 states and 435629 transitions. [2021-07-09 16:25:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:25:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:48,549 INFO L225 Difference]: With dead ends: 163890 [2021-07-09 16:25:48,550 INFO L226 Difference]: Without dead ends: 163890 [2021-07-09 16:25:48,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:25:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163890 states. [2021-07-09 16:25:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163890 to 125475. [2021-07-09 16:25:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125475 states, 125473 states have (on average 2.680409331091151) internal successors, (336319), 125474 states have internal predecessors, (336319), 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) [2021-07-09 16:25:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125475 states to 125475 states and 336319 transitions. [2021-07-09 16:25:52,553 INFO L78 Accepts]: Start accepts. Automaton has 125475 states and 336319 transitions. Word has length 442 [2021-07-09 16:25:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:52,553 INFO L482 AbstractCegarLoop]: Abstraction has 125475 states and 336319 transitions. [2021-07-09 16:25:52,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 125475 states and 336319 transitions. [2021-07-09 16:25:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:25:52,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:52,801 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:53,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,015 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash -138136298, now seen corresponding path program 45 times [2021-07-09 16:25:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:53,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647428118] [2021-07-09 16:25:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:25:53,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647428118] [2021-07-09 16:25:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647428118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031009824] [2021-07-09 16:25:53,164 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:25:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:53,874 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:25:54,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031009824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:54,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:54,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:25:54,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935455090] [2021-07-09 16:25:54,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:54,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:54,237 INFO L87 Difference]: Start difference. First operand 125475 states and 336319 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:25:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:55,153 INFO L93 Difference]: Finished difference Result 171200 states and 455265 transitions. [2021-07-09 16:25:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:25:55,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:25:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:55,517 INFO L225 Difference]: With dead ends: 171200 [2021-07-09 16:25:55,517 INFO L226 Difference]: Without dead ends: 171200 [2021-07-09 16:25:55,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171200 states. [2021-07-09 16:25:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171200 to 127635. [2021-07-09 16:25:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 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) [2021-07-09 16:26:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-07-09 16:26:00,097 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-07-09 16:26:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:00,097 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-07-09 16:26:00,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:26:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-07-09 16:26:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:26:00,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:00,366 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:00,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:00,581 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1263415176, now seen corresponding path program 46 times [2021-07-09 16:26:00,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:00,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744089268] [2021-07-09 16:26:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:26:00,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744089268] [2021-07-09 16:26:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744089268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462055458] [2021-07-09 16:26:00,729 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:01,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:26:02,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462055458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:02,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:02,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:26:02,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993308288] [2021-07-09 16:26:02,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:26:02,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:26:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:26:02,270 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:26:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:03,202 INFO L93 Difference]: Finished difference Result 177035 states and 471099 transitions. [2021-07-09 16:26:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:26:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:26:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:03,598 INFO L225 Difference]: With dead ends: 177035 [2021-07-09 16:26:03,598 INFO L226 Difference]: Without dead ends: 177035 [2021-07-09 16:26:03,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:26:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177035 states. [2021-07-09 16:26:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177035 to 127635. [2021-07-09 16:26:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 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) [2021-07-09 16:26:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-07-09 16:26:07,523 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-07-09 16:26:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:07,523 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-07-09 16:26:07,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:26:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-07-09 16:26:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-09 16:26:07,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:07,742 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:07,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:07,962 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1878649302, now seen corresponding path program 47 times [2021-07-09 16:26:07,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:07,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688403398] [2021-07-09 16:26:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-09 16:26:08,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688403398] [2021-07-09 16:26:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688403398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176134672] [2021-07-09 16:26:08,719 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:08,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:26:08,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:26:09,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176134672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:09,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:09,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:26:09,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212675534] [2021-07-09 16:26:09,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:26:09,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:26:09,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:26:09,397 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:26:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:10,373 INFO L93 Difference]: Finished difference Result 171770 states and 456242 transitions. [2021-07-09 16:26:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:26:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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 442 [2021-07-09 16:26:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:11,227 INFO L225 Difference]: With dead ends: 171770 [2021-07-09 16:26:11,227 INFO L226 Difference]: Without dead ends: 171770 [2021-07-09 16:26:11,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 807.4ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:26:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171770 states. [2021-07-09 16:26:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171770 to 143255. [2021-07-09 16:26:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143255 states, 143253 states have (on average 2.6846069541301056) internal successors, (384578), 143254 states have internal predecessors, (384578), 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) [2021-07-09 16:26:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-07-09 16:26:14,931 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 442 [2021-07-09 16:26:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:14,931 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-07-09 16:26:14,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 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) [2021-07-09 16:26:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-07-09 16:26:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:15,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:15,759 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:15,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 16:26:15,977 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -687059827, now seen corresponding path program 48 times [2021-07-09 16:26:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:15,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862639128] [2021-07-09 16:26:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:16,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:16,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862639128] [2021-07-09 16:26:16,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862639128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:16,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286090462] [2021-07-09 16:26:16,138 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:16,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:26:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:17,332 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:26:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286090462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:17,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:17,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:17,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899916511] [2021-07-09 16:26:17,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:17,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:17,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:17,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:17,356 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:18,541 INFO L93 Difference]: Finished difference Result 181095 states and 482560 transitions. [2021-07-09 16:26:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:26:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:18,941 INFO L225 Difference]: With dead ends: 181095 [2021-07-09 16:26:18,941 INFO L226 Difference]: Without dead ends: 181095 [2021-07-09 16:26:18,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181095 states. [2021-07-09 16:26:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181095 to 141435. [2021-07-09 16:26:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 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) [2021-07-09 16:26:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-07-09 16:26:23,033 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-07-09 16:26:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:23,034 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-07-09 16:26:23,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-07-09 16:26:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:23,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:23,924 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:24,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:24,137 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1444112891, now seen corresponding path program 49 times [2021-07-09 16:26:24,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:24,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521617629] [2021-07-09 16:26:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:24,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521617629] [2021-07-09 16:26:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521617629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49878030] [2021-07-09 16:26:24,288 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49878030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:24,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:24,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:24,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573204181] [2021-07-09 16:26:24,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:24,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:24,817 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:26,242 INFO L93 Difference]: Finished difference Result 215205 states and 575027 transitions. [2021-07-09 16:26:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:26:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:26,793 INFO L225 Difference]: With dead ends: 215205 [2021-07-09 16:26:26,793 INFO L226 Difference]: Without dead ends: 215205 [2021-07-09 16:26:26,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215205 states. [2021-07-09 16:26:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215205 to 141435. [2021-07-09 16:26:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 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) [2021-07-09 16:26:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-07-09 16:26:31,294 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-07-09 16:26:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:31,294 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-07-09 16:26:31,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-07-09 16:26:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:31,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:31,743 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:31,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 16:26:31,961 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1725575527, now seen corresponding path program 50 times [2021-07-09 16:26:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065074372] [2021-07-09 16:26:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:32,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065074372] [2021-07-09 16:26:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065074372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057627469] [2021-07-09 16:26:32,137 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:32,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057627469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:32,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:32,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646182933] [2021-07-09 16:26:32,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:32,747 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:34,129 INFO L93 Difference]: Finished difference Result 180350 states and 480244 transitions. [2021-07-09 16:26:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:26:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:34,619 INFO L225 Difference]: With dead ends: 180350 [2021-07-09 16:26:34,619 INFO L226 Difference]: Without dead ends: 180350 [2021-07-09 16:26:34,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180350 states. [2021-07-09 16:26:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180350 to 138535. [2021-07-09 16:26:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 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) [2021-07-09 16:26:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-07-09 16:26:38,858 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-07-09 16:26:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:38,858 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-07-09 16:26:38,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-07-09 16:26:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:39,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:39,109 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:39,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:39,326 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:39,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1874991501, now seen corresponding path program 51 times [2021-07-09 16:26:39,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:39,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028751704] [2021-07-09 16:26:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:39,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028751704] [2021-07-09 16:26:39,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028751704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:39,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546567234] [2021-07-09 16:26:39,952 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:40,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:26:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546567234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:40,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601868148] [2021-07-09 16:26:40,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:40,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:40,823 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:42,325 INFO L93 Difference]: Finished difference Result 214110 states and 571753 transitions. [2021-07-09 16:26:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:26:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:42,927 INFO L225 Difference]: With dead ends: 214110 [2021-07-09 16:26:42,927 INFO L226 Difference]: Without dead ends: 214110 [2021-07-09 16:26:42,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214110 states. [2021-07-09 16:26:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214110 to 138535. [2021-07-09 16:26:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 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) [2021-07-09 16:26:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-07-09 16:26:47,364 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-07-09 16:26:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:47,364 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-07-09 16:26:47,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-07-09 16:26:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:48,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:48,033 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:48,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:48,252 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash 749712623, now seen corresponding path program 52 times [2021-07-09 16:26:48,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:48,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684761346] [2021-07-09 16:26:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:48,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684761346] [2021-07-09 16:26:48,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684761346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451141514] [2021-07-09 16:26:48,417 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:49,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:49,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:49,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451141514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:49,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:49,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382209558] [2021-07-09 16:26:49,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:49,605 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:51,041 INFO L93 Difference]: Finished difference Result 226060 states and 604582 transitions. [2021-07-09 16:26:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:26:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:51,646 INFO L225 Difference]: With dead ends: 226060 [2021-07-09 16:26:51,646 INFO L226 Difference]: Without dead ends: 226060 [2021-07-09 16:26:51,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:26:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226060 states. [2021-07-09 16:26:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226060 to 137455. [2021-07-09 16:26:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137455 states, 137453 states have (on average 2.683302656180658) internal successors, (368828), 137454 states have internal predecessors, (368828), 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) [2021-07-09 16:26:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137455 states to 137455 states and 368828 transitions. [2021-07-09 16:26:56,047 INFO L78 Accepts]: Start accepts. Automaton has 137455 states and 368828 transitions. Word has length 443 [2021-07-09 16:26:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 137455 states and 368828 transitions. [2021-07-09 16:26:56,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 137455 states and 368828 transitions. [2021-07-09 16:26:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:26:56,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:56,746 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:26:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 16:26:56,965 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -403190195, now seen corresponding path program 53 times [2021-07-09 16:26:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117808589] [2021-07-09 16:26:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:57,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:57,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117808589] [2021-07-09 16:26:57,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117808589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:57,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459246407] [2021-07-09 16:26:57,126 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:57,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:26:57,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:57,830 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:26:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:26:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459246407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:57,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:57,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:57,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210050725] [2021-07-09 16:26:57,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:57,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:57,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:57,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:57,974 INFO L87 Difference]: Start difference. First operand 137455 states and 368828 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:26:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:59,050 INFO L93 Difference]: Finished difference Result 174995 states and 465521 transitions. [2021-07-09 16:26:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:26:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:26:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:59,493 INFO L225 Difference]: With dead ends: 174995 [2021-07-09 16:26:59,494 INFO L226 Difference]: Without dead ends: 174995 [2021-07-09 16:26:59,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:27:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174995 states. [2021-07-09 16:27:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174995 to 137715. [2021-07-09 16:27:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137715 states, 137713 states have (on average 2.683050982841126) internal successors, (369491), 137714 states have internal predecessors, (369491), 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) [2021-07-09 16:27:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137715 states to 137715 states and 369491 transitions. [2021-07-09 16:27:03,723 INFO L78 Accepts]: Start accepts. Automaton has 137715 states and 369491 transitions. Word has length 443 [2021-07-09 16:27:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:03,724 INFO L482 AbstractCegarLoop]: Abstraction has 137715 states and 369491 transitions. [2021-07-09 16:27:03,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137715 states and 369491 transitions. [2021-07-09 16:27:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:03,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:03,981 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:04,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 16:27:04,199 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1925469947, now seen corresponding path program 54 times [2021-07-09 16:27:04,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:04,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203588334] [2021-07-09 16:27:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:04,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:04,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203588334] [2021-07-09 16:27:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203588334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656462905] [2021-07-09 16:27:04,816 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:05,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:27:05,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:05,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656462905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:05,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:05,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:05,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594794988] [2021-07-09 16:27:05,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:05,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:05,662 INFO L87 Difference]: Start difference. First operand 137715 states and 369491 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:07,470 INFO L93 Difference]: Finished difference Result 210545 states and 561473 transitions. [2021-07-09 16:27:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:27:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:08,115 INFO L225 Difference]: With dead ends: 210545 [2021-07-09 16:27:08,115 INFO L226 Difference]: Without dead ends: 210545 [2021-07-09 16:27:08,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:27:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210545 states. [2021-07-09 16:27:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210545 to 138795. [2021-07-09 16:27:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138795 states, 138793 states have (on average 2.6834566584770125) internal successors, (372445), 138794 states have internal predecessors, (372445), 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) [2021-07-09 16:27:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138795 states to 138795 states and 372445 transitions. [2021-07-09 16:27:12,402 INFO L78 Accepts]: Start accepts. Automaton has 138795 states and 372445 transitions. Word has length 443 [2021-07-09 16:27:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:12,403 INFO L482 AbstractCegarLoop]: Abstraction has 138795 states and 372445 transitions. [2021-07-09 16:27:12,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 138795 states and 372445 transitions. [2021-07-09 16:27:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:13,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:13,114 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:13,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:13,332 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1244218471, now seen corresponding path program 55 times [2021-07-09 16:27:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994131624] [2021-07-09 16:27:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:13,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:13,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994131624] [2021-07-09 16:27:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994131624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:13,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661672130] [2021-07-09 16:27:13,554 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661672130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:14,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:14,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596367699] [2021-07-09 16:27:14,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:14,119 INFO L87 Difference]: Start difference. First operand 138795 states and 372445 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:15,776 INFO L93 Difference]: Finished difference Result 226775 states and 605776 transitions. [2021-07-09 16:27:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:27:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:16,356 INFO L225 Difference]: With dead ends: 226775 [2021-07-09 16:27:16,356 INFO L226 Difference]: Without dead ends: 226775 [2021-07-09 16:27:16,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=408, Invalid=1232, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:27:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226775 states. [2021-07-09 16:27:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226775 to 136635. [2021-07-09 16:27:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136635 states, 136633 states have (on average 2.6826388939714416) internal successors, (366537), 136634 states have internal predecessors, (366537), 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) [2021-07-09 16:27:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136635 states to 136635 states and 366537 transitions. [2021-07-09 16:27:21,034 INFO L78 Accepts]: Start accepts. Automaton has 136635 states and 366537 transitions. Word has length 443 [2021-07-09 16:27:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:21,035 INFO L482 AbstractCegarLoop]: Abstraction has 136635 states and 366537 transitions. [2021-07-09 16:27:21,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 136635 states and 366537 transitions. [2021-07-09 16:27:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:21,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:21,814 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:22,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 16:27:22,031 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash 91315653, now seen corresponding path program 56 times [2021-07-09 16:27:22,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:22,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345192685] [2021-07-09 16:27:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:22,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345192685] [2021-07-09 16:27:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345192685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266151822] [2021-07-09 16:27:22,216 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:22,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:27:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:22,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:22,896 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:27:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:22,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266151822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:22,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:22,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454231936] [2021-07-09 16:27:22,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:22,992 INFO L87 Difference]: Start difference. First operand 136635 states and 366537 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:24,250 INFO L93 Difference]: Finished difference Result 227105 states and 606454 transitions. [2021-07-09 16:27:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:27:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:25,174 INFO L225 Difference]: With dead ends: 227105 [2021-07-09 16:27:25,174 INFO L226 Difference]: Without dead ends: 227105 [2021-07-09 16:27:25,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:27:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227105 states. [2021-07-09 16:27:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227105 to 142095. [2021-07-09 16:27:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142095 states, 142093 states have (on average 2.6834537943459567) internal successors, (381300), 142094 states have internal predecessors, (381300), 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) [2021-07-09 16:27:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142095 states to 142095 states and 381300 transitions. [2021-07-09 16:27:29,532 INFO L78 Accepts]: Start accepts. Automaton has 142095 states and 381300 transitions. Word has length 443 [2021-07-09 16:27:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:29,533 INFO L482 AbstractCegarLoop]: Abstraction has 142095 states and 381300 transitions. [2021-07-09 16:27:29,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 142095 states and 381300 transitions. [2021-07-09 16:27:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:29,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:29,796 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 16:27:30,013 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash 551638951, now seen corresponding path program 57 times [2021-07-09 16:27:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191806166] [2021-07-09 16:27:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:30,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:30,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191806166] [2021-07-09 16:27:30,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191806166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615845160] [2021-07-09 16:27:30,561 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:30,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:27:30,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615845160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:31,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:31,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098332322] [2021-07-09 16:27:31,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:31,326 INFO L87 Difference]: Start difference. First operand 142095 states and 381300 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:32,323 INFO L93 Difference]: Finished difference Result 175900 states and 466844 transitions. [2021-07-09 16:27:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:27:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:33,054 INFO L225 Difference]: With dead ends: 175900 [2021-07-09 16:27:33,054 INFO L226 Difference]: Without dead ends: 175900 [2021-07-09 16:27:33,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:27:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175900 states. [2021-07-09 16:27:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175900 to 147415. [2021-07-09 16:27:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147415 states, 147413 states have (on average 2.684607192038694) internal successors, (395746), 147414 states have internal predecessors, (395746), 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) [2021-07-09 16:27:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147415 states to 147415 states and 395746 transitions. [2021-07-09 16:27:37,176 INFO L78 Accepts]: Start accepts. Automaton has 147415 states and 395746 transitions. Word has length 443 [2021-07-09 16:27:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:37,176 INFO L482 AbstractCegarLoop]: Abstraction has 147415 states and 395746 transitions. [2021-07-09 16:27:37,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 147415 states and 395746 transitions. [2021-07-09 16:27:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:37,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:37,444 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:37,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 16:27:37,657 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1019074931, now seen corresponding path program 58 times [2021-07-09 16:27:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:37,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298383378] [2021-07-09 16:27:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:37,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298383378] [2021-07-09 16:27:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298383378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682475013] [2021-07-09 16:27:37,910 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:38,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:27:38,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:38,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:38,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:38,929 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:27:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682475013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639028660] [2021-07-09 16:27:39,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:39,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:39,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:39,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:39,257 INFO L87 Difference]: Start difference. First operand 147415 states and 395746 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:40,454 INFO L93 Difference]: Finished difference Result 201235 states and 536688 transitions. [2021-07-09 16:27:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:27:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:41,276 INFO L225 Difference]: With dead ends: 201235 [2021-07-09 16:27:41,276 INFO L226 Difference]: Without dead ends: 201235 [2021-07-09 16:27:41,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:27:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201235 states. [2021-07-09 16:27:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201235 to 149575. [2021-07-09 16:27:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149575 states, 149573 states have (on average 2.685337594351922) internal successors, (401654), 149574 states have internal predecessors, (401654), 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) [2021-07-09 16:27:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149575 states to 149575 states and 401654 transitions. [2021-07-09 16:27:47,186 INFO L78 Accepts]: Start accepts. Automaton has 149575 states and 401654 transitions. Word has length 443 [2021-07-09 16:27:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:47,187 INFO L482 AbstractCegarLoop]: Abstraction has 149575 states and 401654 transitions. [2021-07-09 16:27:47,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 149575 states and 401654 transitions. [2021-07-09 16:27:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:47,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:47,467 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:47,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:47,681 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2144353809, now seen corresponding path program 59 times [2021-07-09 16:27:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951419896] [2021-07-09 16:27:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:48,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:48,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951419896] [2021-07-09 16:27:48,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951419896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:48,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208629517] [2021-07-09 16:27:48,234 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:48,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:27:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208629517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307100063] [2021-07-09 16:27:49,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:49,108 INFO L87 Difference]: Start difference. First operand 149575 states and 401654 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:50,840 INFO L93 Difference]: Finished difference Result 213830 states and 570872 transitions. [2021-07-09 16:27:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:27:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:27:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:51,738 INFO L225 Difference]: With dead ends: 213830 [2021-07-09 16:27:51,738 INFO L226 Difference]: Without dead ends: 213830 [2021-07-09 16:27:51,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:27:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213830 states. [2021-07-09 16:27:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213830 to 148495. [2021-07-09 16:27:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148495 states, 148493 states have (on average 2.6849750493289246) internal successors, (398700), 148494 states have internal predecessors, (398700), 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) [2021-07-09 16:27:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148495 states to 148495 states and 398700 transitions. [2021-07-09 16:27:56,499 INFO L78 Accepts]: Start accepts. Automaton has 148495 states and 398700 transitions. Word has length 443 [2021-07-09 16:27:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:56,500 INFO L482 AbstractCegarLoop]: Abstraction has 148495 states and 398700 transitions. [2021-07-09 16:27:56,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:27:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 148495 states and 398700 transitions. [2021-07-09 16:27:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:27:57,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:57,190 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:27:57,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 16:27:57,405 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 997710669, now seen corresponding path program 60 times [2021-07-09 16:27:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:57,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035394100] [2021-07-09 16:27:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:57,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035394100] [2021-07-09 16:27:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035394100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123901411] [2021-07-09 16:27:57,558 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:58,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:27:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:27:58,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123901411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:58,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:58,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152808473] [2021-07-09 16:27:58,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:58,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:58,478 INFO L87 Difference]: Start difference. First operand 148495 states and 398700 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:00,133 INFO L93 Difference]: Finished difference Result 224125 states and 598255 transitions. [2021-07-09 16:28:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:28:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:00,733 INFO L225 Difference]: With dead ends: 224125 [2021-07-09 16:28:00,733 INFO L226 Difference]: Without dead ends: 224125 [2021-07-09 16:28:00,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:28:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224125 states. [2021-07-09 16:28:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224125 to 152135. [2021-07-09 16:28:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152135 states, 152133 states have (on average 2.6854265675428737) internal successors, (408542), 152134 states have internal predecessors, (408542), 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) [2021-07-09 16:28:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152135 states to 152135 states and 408542 transitions. [2021-07-09 16:28:05,847 INFO L78 Accepts]: Start accepts. Automaton has 152135 states and 408542 transitions. Word has length 443 [2021-07-09 16:28:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:05,847 INFO L482 AbstractCegarLoop]: Abstraction has 152135 states and 408542 transitions. [2021-07-09 16:28:05,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 152135 states and 408542 transitions. [2021-07-09 16:28:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:06,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:06,166 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:06,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 16:28:06,386 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1458033967, now seen corresponding path program 61 times [2021-07-09 16:28:06,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:06,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014693310] [2021-07-09 16:28:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014693310] [2021-07-09 16:28:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014693310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758957448] [2021-07-09 16:28:06,552 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:07,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758957448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:07,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:07,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:28:07,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992432565] [2021-07-09 16:28:07,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:07,469 INFO L87 Difference]: Start difference. First operand 152135 states and 408542 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:08,731 INFO L93 Difference]: Finished difference Result 215735 states and 575934 transitions. [2021-07-09 16:28:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:28:08,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:09,972 INFO L225 Difference]: With dead ends: 215735 [2021-07-09 16:28:09,973 INFO L226 Difference]: Without dead ends: 215735 [2021-07-09 16:28:09,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:28:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215735 states. [2021-07-09 16:28:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215735 to 155035. [2021-07-09 16:28:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155035 states, 155033 states have (on average 2.685989434507492) internal successors, (416417), 155034 states have internal predecessors, (416417), 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) [2021-07-09 16:28:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155035 states to 155035 states and 416417 transitions. [2021-07-09 16:28:14,909 INFO L78 Accepts]: Start accepts. Automaton has 155035 states and 416417 transitions. Word has length 443 [2021-07-09 16:28:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:14,909 INFO L482 AbstractCegarLoop]: Abstraction has 155035 states and 416417 transitions. [2021-07-09 16:28:14,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155035 states and 416417 transitions. [2021-07-09 16:28:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:15,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:15,629 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:15,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:15,846 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash -356712435, now seen corresponding path program 62 times [2021-07-09 16:28:15,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:15,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047876678] [2021-07-09 16:28:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:16,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047876678] [2021-07-09 16:28:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047876678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383129618] [2021-07-09 16:28:16,006 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:16,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:28:16,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:16,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383129618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:16,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:16,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:28:16,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175093432] [2021-07-09 16:28:16,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:16,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:16,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:16,746 INFO L87 Difference]: Start difference. First operand 155035 states and 416417 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:17,871 INFO L93 Difference]: Finished difference Result 184590 states and 490845 transitions. [2021-07-09 16:28:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:28:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:18,564 INFO L225 Difference]: With dead ends: 184590 [2021-07-09 16:28:18,564 INFO L226 Difference]: Without dead ends: 184590 [2021-07-09 16:28:18,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:28:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184590 states. [2021-07-09 16:28:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184590 to 157195. [2021-07-09 16:28:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-07-09 16:28:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-09 16:28:22,758 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-07-09 16:28:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:22,759 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-09 16:28:22,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-09 16:28:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:23,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:23,081 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:23,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:23,298 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1080525819, now seen corresponding path program 63 times [2021-07-09 16:28:23,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:23,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534059912] [2021-07-09 16:28:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:28:23,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534059912] [2021-07-09 16:28:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534059912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832438007] [2021-07-09 16:28:23,870 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:24,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:28:24,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832438007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:24,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:24,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:28:24,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549961536] [2021-07-09 16:28:24,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:24,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:24,709 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:26,024 INFO L93 Difference]: Finished difference Result 194125 states and 517955 transitions. [2021-07-09 16:28:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:28:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:26,466 INFO L225 Difference]: With dead ends: 194125 [2021-07-09 16:28:26,466 INFO L226 Difference]: Without dead ends: 194125 [2021-07-09 16:28:26,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:28:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194125 states. [2021-07-09 16:28:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194125 to 158275. [2021-07-09 16:28:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158275 states, 158273 states have (on average 2.6869965186734315) internal successors, (425279), 158274 states have internal predecessors, (425279), 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) [2021-07-09 16:28:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158275 states to 158275 states and 425279 transitions. [2021-07-09 16:28:30,381 INFO L78 Accepts]: Start accepts. Automaton has 158275 states and 425279 transitions. Word has length 443 [2021-07-09 16:28:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:30,381 INFO L482 AbstractCegarLoop]: Abstraction has 158275 states and 425279 transitions. [2021-07-09 16:28:30,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 158275 states and 425279 transitions. [2021-07-09 16:28:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:31,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:31,157 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:31,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:31,361 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2089162599, now seen corresponding path program 64 times [2021-07-09 16:28:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738656762] [2021-07-09 16:28:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:28:31,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:31,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738656762] [2021-07-09 16:28:31,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738656762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:31,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315098044] [2021-07-09 16:28:31,542 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:32,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:28:32,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:32,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315098044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:32,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:32,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:28:32,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794781550] [2021-07-09 16:28:32,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:32,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:32,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:32,733 INFO L87 Difference]: Start difference. First operand 158275 states and 425279 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:34,093 INFO L93 Difference]: Finished difference Result 202530 states and 540291 transitions. [2021-07-09 16:28:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:28:34,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:34,629 INFO L225 Difference]: With dead ends: 202530 [2021-07-09 16:28:34,629 INFO L226 Difference]: Without dead ends: 202530 [2021-07-09 16:28:34,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:28:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202530 states. [2021-07-09 16:28:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202530 to 157195. [2021-07-09 16:28:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-07-09 16:28:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-09 16:28:39,518 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-07-09 16:28:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:39,519 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-09 16:28:39,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-09 16:28:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:39,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:39,849 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:40,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:40,065 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 936259781, now seen corresponding path program 65 times [2021-07-09 16:28:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282151185] [2021-07-09 16:28:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:28:40,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282151185] [2021-07-09 16:28:40,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282151185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:40,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430016621] [2021-07-09 16:28:40,595 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:40,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:28:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:41,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430016621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:41,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:41,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:28:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626218711] [2021-07-09 16:28:41,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:41,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:41,299 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:42,849 INFO L93 Difference]: Finished difference Result 208415 states and 555982 transitions. [2021-07-09 16:28:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:28:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:43,399 INFO L225 Difference]: With dead ends: 208415 [2021-07-09 16:28:43,400 INFO L226 Difference]: Without dead ends: 208415 [2021-07-09 16:28:43,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:28:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208415 states. [2021-07-09 16:28:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208415 to 156115. [2021-07-09 16:28:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156115 states, 156113 states have (on average 2.6863297739457956) internal successors, (419371), 156114 states have internal predecessors, (419371), 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) [2021-07-09 16:28:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156115 states to 156115 states and 419371 transitions. [2021-07-09 16:28:47,465 INFO L78 Accepts]: Start accepts. Automaton has 156115 states and 419371 transitions. Word has length 443 [2021-07-09 16:28:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:47,466 INFO L482 AbstractCegarLoop]: Abstraction has 156115 states and 419371 transitions. [2021-07-09 16:28:47,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 156115 states and 419371 transitions. [2021-07-09 16:28:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:48,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:48,195 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 16:28:48,413 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1396583079, now seen corresponding path program 66 times [2021-07-09 16:28:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757628033] [2021-07-09 16:28:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:28:48,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:48,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757628033] [2021-07-09 16:28:48,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757628033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:48,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961736409] [2021-07-09 16:28:48,669 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:49,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:28:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:49,762 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:28:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:49,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961736409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:49,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:49,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:28:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245841427] [2021-07-09 16:28:49,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:49,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:49,874 INFO L87 Difference]: Start difference. First operand 156115 states and 419371 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:51,396 INFO L93 Difference]: Finished difference Result 204375 states and 544297 transitions. [2021-07-09 16:28:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:28:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:28:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:52,194 INFO L225 Difference]: With dead ends: 204375 [2021-07-09 16:28:52,194 INFO L226 Difference]: Without dead ends: 204375 [2021-07-09 16:28:52,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:28:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204375 states. [2021-07-09 16:28:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204375 to 160835. [2021-07-09 16:28:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-07-09 16:28:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-09 16:28:57,447 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-07-09 16:28:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:57,447 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-09 16:28:57,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:28:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-09 16:28:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:28:57,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:57,769 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:28:57,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 16:28:57,988 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -418163323, now seen corresponding path program 67 times [2021-07-09 16:28:57,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:57,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798099126] [2021-07-09 16:28:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:28:58,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798099126] [2021-07-09 16:28:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798099126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043775374] [2021-07-09 16:28:58,762 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:28:59,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043775374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:59,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:59,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:28:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873844409] [2021-07-09 16:28:59,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:28:59,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:28:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:28:59,326 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:29:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:00,634 INFO L93 Difference]: Finished difference Result 203605 states and 542647 transitions. [2021-07-09 16:29:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:29:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:01,662 INFO L225 Difference]: With dead ends: 203605 [2021-07-09 16:29:01,663 INFO L226 Difference]: Without dead ends: 203605 [2021-07-09 16:29:01,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 855.2ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:29:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203605 states. [2021-07-09 16:29:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203605 to 160835. [2021-07-09 16:29:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-07-09 16:29:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-09 16:29:06,159 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-07-09 16:29:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:06,159 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-09 16:29:06,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:29:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-09 16:29:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-09 16:29:07,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:07,025 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-07-09 16:29:07,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 16:29:07,242 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1993290265, now seen corresponding path program 68 times [2021-07-09 16:29:07,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:07,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951413645] [2021-07-09 16:29:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-09 16:29:07,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951413645] [2021-07-09 16:29:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951413645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841732007] [2021-07-09 16:29:07,419 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:07,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:29:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:08,051 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:29:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-09 16:29:08,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841732007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:08,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:08,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:29:08,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270677875] [2021-07-09 16:29:08,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:29:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:08,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:29:08,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:29:08,164 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:29:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:09,363 INFO L93 Difference]: Finished difference Result 189335 states and 504332 transitions. [2021-07-09 16:29:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:09,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 443 [2021-07-09 16:29:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:09,829 INFO L225 Difference]: With dead ends: 189335 [2021-07-09 16:29:09,829 INFO L226 Difference]: Without dead ends: 189335 [2021-07-09 16:29:09,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:29:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189335 states. [2021-07-09 16:29:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189335 to 162995. [2021-07-09 16:29:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162995 states, 162993 states have (on average 2.6876921094770942) internal successors, (438075), 162994 states have internal predecessors, (438075), 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) [2021-07-09 16:29:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162995 states to 162995 states and 438075 transitions. [2021-07-09 16:29:14,937 INFO L78 Accepts]: Start accepts. Automaton has 162995 states and 438075 transitions. Word has length 443 [2021-07-09 16:29:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:14,939 INFO L482 AbstractCegarLoop]: Abstraction has 162995 states and 438075 transitions. [2021-07-09 16:29:14,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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) [2021-07-09 16:29:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 162995 states and 438075 transitions. [2021-07-09 16:29:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:15,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:15,278 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:15,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:15,479 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash 873587028, now seen corresponding path program 34 times [2021-07-09 16:29:15,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:15,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234575758] [2021-07-09 16:29:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:16,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234575758] [2021-07-09 16:29:16,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234575758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:16,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159666946] [2021-07-09 16:29:16,049 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:17,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:29:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:17,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159666946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:17,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:17,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:29:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950858112] [2021-07-09 16:29:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:29:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:29:17,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:29:17,510 INFO L87 Difference]: Start difference. First operand 162995 states and 438075 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:18,919 INFO L93 Difference]: Finished difference Result 190380 states and 508089 transitions. [2021-07-09 16:29:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:29:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:29:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:19,401 INFO L225 Difference]: With dead ends: 190380 [2021-07-09 16:29:19,402 INFO L226 Difference]: Without dead ends: 190380 [2021-07-09 16:29:19,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 16:29:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190380 states. [2021-07-09 16:29:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190380 to 161915. [2021-07-09 16:29:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161915 states, 161913 states have (on average 2.6873753188440705) internal successors, (435121), 161914 states have internal predecessors, (435121), 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) [2021-07-09 16:29:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161915 states to 161915 states and 435121 transitions. [2021-07-09 16:29:24,150 INFO L78 Accepts]: Start accepts. Automaton has 161915 states and 435121 transitions. Word has length 444 [2021-07-09 16:29:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 161915 states and 435121 transitions. [2021-07-09 16:29:24,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 161915 states and 435121 transitions. [2021-07-09 16:29:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:24,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:24,501 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:24,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 16:29:24,708 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -410716848, now seen corresponding path program 35 times [2021-07-09 16:29:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:24,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971701850] [2021-07-09 16:29:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:24,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971701850] [2021-07-09 16:29:24,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971701850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:24,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93819498] [2021-07-09 16:29:24,903 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:25,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:29:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:25,815 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:29:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93819498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:26,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:26,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:29:26,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541765911] [2021-07-09 16:29:26,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:29:26,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:29:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:29:26,069 INFO L87 Difference]: Start difference. First operand 161915 states and 435121 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:27,357 INFO L93 Difference]: Finished difference Result 195055 states and 519894 transitions. [2021-07-09 16:29:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 16:29:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:29:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:28,171 INFO L225 Difference]: With dead ends: 195055 [2021-07-09 16:29:28,171 INFO L226 Difference]: Without dead ends: 195055 [2021-07-09 16:29:28,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 16:29:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195055 states. [2021-07-09 16:29:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195055 to 160835. [2021-07-09 16:29:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 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) [2021-07-09 16:29:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-09 16:29:32,624 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 444 [2021-07-09 16:29:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:32,625 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-09 16:29:32,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-09 16:29:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:33,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:33,320 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:33,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:33,536 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash -962822188, now seen corresponding path program 36 times [2021-07-09 16:29:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770375745] [2021-07-09 16:29:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:33,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:33,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770375745] [2021-07-09 16:29:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770375745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078802848] [2021-07-09 16:29:33,724 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:34,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:29:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:34,672 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:29:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078802848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:34,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:34,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:29:34,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564297804] [2021-07-09 16:29:34,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:29:34,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:29:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:29:34,828 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:36,249 INFO L93 Difference]: Finished difference Result 200050 states and 532784 transitions. [2021-07-09 16:29:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:29:36,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:29:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:37,117 INFO L225 Difference]: With dead ends: 200050 [2021-07-09 16:29:37,117 INFO L226 Difference]: Without dead ends: 200050 [2021-07-09 16:29:37,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:29:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200050 states. [2021-07-09 16:29:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200050 to 159015. [2021-07-09 16:29:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 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) [2021-07-09 16:29:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-07-09 16:29:41,394 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-07-09 16:29:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:41,394 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-07-09 16:29:41,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-07-09 16:29:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:41,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:41,710 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:41,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 16:29:41,929 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1658730800, now seen corresponding path program 37 times [2021-07-09 16:29:41,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:41,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17408608] [2021-07-09 16:29:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:42,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17408608] [2021-07-09 16:29:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17408608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103865040] [2021-07-09 16:29:42,526 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:43,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103865040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:43,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:43,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:29:43,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295870577] [2021-07-09 16:29:43,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:29:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:29:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:29:43,091 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:44,690 INFO L93 Difference]: Finished difference Result 198935 states and 529553 transitions. [2021-07-09 16:29:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:29:44,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:29:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:45,232 INFO L225 Difference]: With dead ends: 198935 [2021-07-09 16:29:45,232 INFO L226 Difference]: Without dead ends: 198935 [2021-07-09 16:29:45,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:29:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198935 states. [2021-07-09 16:29:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198935 to 157195. [2021-07-09 16:29:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 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) [2021-07-09 16:29:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-09 16:29:50,435 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 444 [2021-07-09 16:29:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:50,436 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-09 16:29:50,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-09 16:29:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:51,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:51,452 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:51,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:51,665 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 136461908, now seen corresponding path program 38 times [2021-07-09 16:29:51,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:51,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342775487] [2021-07-09 16:29:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:51,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342775487] [2021-07-09 16:29:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342775487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799387645] [2021-07-09 16:29:51,856 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:52,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:29:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:29:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:52,430 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:29:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:29:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799387645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:52,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:52,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:29:52,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748122445] [2021-07-09 16:29:52,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:29:52,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:29:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:29:52,648 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:53,914 INFO L93 Difference]: Finished difference Result 194530 states and 517760 transitions. [2021-07-09 16:29:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:29:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:29:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:54,707 INFO L225 Difference]: With dead ends: 194530 [2021-07-09 16:29:54,707 INFO L226 Difference]: Without dead ends: 194530 [2021-07-09 16:29:54,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:29:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194530 states. [2021-07-09 16:29:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194530 to 159015. [2021-07-09 16:29:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 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) [2021-07-09 16:29:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-07-09 16:29:59,365 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-07-09 16:29:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:59,365 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-07-09 16:29:59,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:29:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-07-09 16:29:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:29:59,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:59,691 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:59,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:59,906 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash 284129360, now seen corresponding path program 39 times [2021-07-09 16:29:59,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:59,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919055827] [2021-07-09 16:29:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:00,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:00,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919055827] [2021-07-09 16:30:00,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919055827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:00,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727533858] [2021-07-09 16:30:00,518 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:01,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 16:30:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:30:01,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:01,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727533858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:01,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:01,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:30:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970417824] [2021-07-09 16:30:01,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:30:01,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:30:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:30:01,552 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:02,973 INFO L93 Difference]: Finished difference Result 190075 states and 506227 transitions. [2021-07-09 16:30:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:30:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:30:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:03,922 INFO L225 Difference]: With dead ends: 190075 [2021-07-09 16:30:03,922 INFO L226 Difference]: Without dead ends: 190075 [2021-07-09 16:30:03,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=574, Invalid=1496, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:30:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190075 states. [2021-07-09 16:30:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190075 to 157935. [2021-07-09 16:30:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157935 states, 157933 states have (on average 2.6865316305015416) internal successors, (424292), 157934 states have internal predecessors, (424292), 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) [2021-07-09 16:30:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157935 states to 157935 states and 424292 transitions. [2021-07-09 16:30:08,944 INFO L78 Accepts]: Start accepts. Automaton has 157935 states and 424292 transitions. Word has length 444 [2021-07-09 16:30:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:08,945 INFO L482 AbstractCegarLoop]: Abstraction has 157935 states and 424292 transitions. [2021-07-09 16:30:08,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 157935 states and 424292 transitions. [2021-07-09 16:30:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:30:09,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:09,311 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:30:09,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 16:30:09,530 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:09,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1362420524, now seen corresponding path program 40 times [2021-07-09 16:30:09,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:09,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692089560] [2021-07-09 16:30:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:10,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692089560] [2021-07-09 16:30:10,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692089560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:10,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316573347] [2021-07-09 16:30:10,193 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:10,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:30:10,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:10,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:30:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:11,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316573347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:11,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:11,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:30:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800224770] [2021-07-09 16:30:11,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:30:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:30:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:30:11,213 INFO L87 Difference]: Start difference. First operand 157935 states and 424292 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:12,818 INFO L93 Difference]: Finished difference Result 187770 states and 499408 transitions. [2021-07-09 16:30:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:30:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:30:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:13,315 INFO L225 Difference]: With dead ends: 187770 [2021-07-09 16:30:13,315 INFO L226 Difference]: Without dead ends: 187770 [2021-07-09 16:30:13,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:30:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187770 states. [2021-07-09 16:30:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187770 to 156855. [2021-07-09 16:30:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 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) [2021-07-09 16:30:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-07-09 16:30:18,547 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-07-09 16:30:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:18,548 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-07-09 16:30:18,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-07-09 16:30:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:30:19,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:19,291 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:30:19,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 16:30:19,509 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1681520176, now seen corresponding path program 41 times [2021-07-09 16:30:19,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:19,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055151997] [2021-07-09 16:30:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:19,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:19,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055151997] [2021-07-09 16:30:19,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055151997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:19,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550549388] [2021-07-09 16:30:19,712 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:20,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:30:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:30:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:20,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550549388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:20,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:20,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:30:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319789270] [2021-07-09 16:30:20,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:30:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:20,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:30:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:30:20,900 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:22,277 INFO L93 Difference]: Finished difference Result 180580 states and 481042 transitions. [2021-07-09 16:30:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:30:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:30:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:22,768 INFO L225 Difference]: With dead ends: 180580 [2021-07-09 16:30:22,768 INFO L226 Difference]: Without dead ends: 180580 [2021-07-09 16:30:22,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:30:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180580 states. [2021-07-09 16:30:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180580 to 156855. [2021-07-09 16:30:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 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) [2021-07-09 16:30:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-07-09 16:30:27,298 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-07-09 16:30:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:27,298 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-07-09 16:30:27,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-07-09 16:30:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-09 16:30:28,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:28,259 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:30:28,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:28,471 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -222356652, now seen corresponding path program 42 times [2021-07-09 16:30:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:28,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74168070] [2021-07-09 16:30:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1713 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 16:30:28,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:28,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74168070] [2021-07-09 16:30:28,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74168070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:28,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468128674] [2021-07-09 16:30:28,670 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:29,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:30:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:30:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-09 16:30:30,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468128674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:30,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:30,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-09 16:30:30,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935805030] [2021-07-09 16:30:30,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:30:30,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:30,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:30:30,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:30:30,057 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:31,283 INFO L93 Difference]: Finished difference Result 173180 states and 462261 transitions. [2021-07-09 16:30:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:30:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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 444 [2021-07-09 16:30:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:31,729 INFO L225 Difference]: With dead ends: 173180 [2021-07-09 16:30:31,730 INFO L226 Difference]: Without dead ends: 173180 [2021-07-09 16:30:31,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:30:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173180 states. [2021-07-09 16:30:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173180 to 152535. [2021-07-09 16:30:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152535 states, 152533 states have (on average 2.6848091888312693) internal successors, (409522), 152534 states have internal predecessors, (409522), 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) [2021-07-09 16:30:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152535 states to 152535 states and 409522 transitions. [2021-07-09 16:30:36,051 INFO L78 Accepts]: Start accepts. Automaton has 152535 states and 409522 transitions. Word has length 444 [2021-07-09 16:30:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:36,052 INFO L482 AbstractCegarLoop]: Abstraction has 152535 states and 409522 transitions. [2021-07-09 16:30:36,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 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) [2021-07-09 16:30:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 152535 states and 409522 transitions. [2021-07-09 16:30:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-07-09 16:30:36,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:36,836 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2021-07-09 16:30:37,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 16:30:37,056 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:37,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1907019601, now seen corresponding path program 12 times [2021-07-09 16:30:37,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:37,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445230780] [2021-07-09 16:30:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:30:37,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445230780] [2021-07-09 16:30:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445230780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022518382] [2021-07-09 16:30:37,314 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:37,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 16:30:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:37,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:30:38,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022518382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:38,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:38,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-09 16:30:38,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879036752] [2021-07-09 16:30:38,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 16:30:38,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:38,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 16:30:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:30:38,382 INFO L87 Difference]: Start difference. First operand 152535 states and 409522 transitions. Second operand has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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) [2021-07-09 16:30:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:39,891 INFO L93 Difference]: Finished difference Result 167942 states and 449033 transitions. [2021-07-09 16:30:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:30:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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 474 [2021-07-09 16:30:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:40,550 INFO L225 Difference]: With dead ends: 167942 [2021-07-09 16:30:40,550 INFO L226 Difference]: Without dead ends: 167942 [2021-07-09 16:30:40,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:30:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167942 states. [2021-07-09 16:30:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167942 to 159090. [2021-07-09 16:30:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159090 states, 159088 states have (on average 2.684627376043448) internal successors, (427092), 159089 states have internal predecessors, (427092), 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) [2021-07-09 16:30:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159090 states to 159090 states and 427092 transitions. [2021-07-09 16:30:45,660 INFO L78 Accepts]: Start accepts. Automaton has 159090 states and 427092 transitions. Word has length 474 [2021-07-09 16:30:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:45,660 INFO L482 AbstractCegarLoop]: Abstraction has 159090 states and 427092 transitions. [2021-07-09 16:30:45,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 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) [2021-07-09 16:30:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 159090 states and 427092 transitions. [2021-07-09 16:30:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-07-09 16:30:46,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:46,019 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:30:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:46,238 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash 698773911, now seen corresponding path program 69 times [2021-07-09 16:30:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:46,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494579714] [2021-07-09 16:30:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1178 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-07-09 16:30:46,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:46,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494579714] [2021-07-09 16:30:46,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494579714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:46,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066847603] [2021-07-09 16:30:46,381 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:47,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:30:47,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1155 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-07-09 16:30:47,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066847603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:47,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:47,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:30:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943594796] [2021-07-09 16:30:47,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:30:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:30:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:30:47,455 INFO L87 Difference]: Start difference. First operand 159090 states and 427092 transitions. Second operand has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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) [2021-07-09 16:30:49,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:49,309 INFO L93 Difference]: Finished difference Result 277120 states and 738750 transitions. [2021-07-09 16:30:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:30:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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 476 [2021-07-09 16:30:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:50,562 INFO L225 Difference]: With dead ends: 277120 [2021-07-09 16:30:50,563 INFO L226 Difference]: Without dead ends: 277120 [2021-07-09 16:30:50,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:30:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277120 states. [2021-07-09 16:30:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277120 to 193710. [2021-07-09 16:30:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193710 states, 193708 states have (on average 2.6894759121977407) internal successors, (520973), 193709 states have internal predecessors, (520973), 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) [2021-07-09 16:30:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193710 states to 193710 states and 520973 transitions. [2021-07-09 16:30:57,799 INFO L78 Accepts]: Start accepts. Automaton has 193710 states and 520973 transitions. Word has length 476 [2021-07-09 16:30:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:57,800 INFO L482 AbstractCegarLoop]: Abstraction has 193710 states and 520973 transitions. [2021-07-09 16:30:57,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 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) [2021-07-09 16:30:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 193710 states and 520973 transitions. [2021-07-09 16:30:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-09 16:30:58,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:58,788 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:30:59,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 16:30:59,001 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1005353038, now seen corresponding path program 70 times [2021-07-09 16:30:59,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:59,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209124833] [2021-07-09 16:30:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:30:59,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:59,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209124833] [2021-07-09 16:30:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209124833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:59,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801216525] [2021-07-09 16:30:59,156 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:59,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:30:59,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:31:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:31:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801216525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:00,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:31:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:31:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813492555] [2021-07-09 16:31:00,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:31:00,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:31:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:31:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:31:00,096 INFO L87 Difference]: Start difference. First operand 193710 states and 520973 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-07-09 16:31:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:31:01,842 INFO L93 Difference]: Finished difference Result 252720 states and 674678 transitions. [2021-07-09 16:31:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:31:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-07-09 16:31:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:31:03,069 INFO L225 Difference]: With dead ends: 252720 [2021-07-09 16:31:03,069 INFO L226 Difference]: Without dead ends: 252720 [2021-07-09 16:31:03,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:31:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252720 states. [2021-07-09 16:31:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252720 to 190550. [2021-07-09 16:31:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190550 states, 190548 states have (on average 2.689269895249491) internal successors, (512435), 190549 states have internal predecessors, (512435), 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) [2021-07-09 16:31:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190550 states to 190550 states and 512435 transitions. [2021-07-09 16:31:09,695 INFO L78 Accepts]: Start accepts. Automaton has 190550 states and 512435 transitions. Word has length 477 [2021-07-09 16:31:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:31:09,696 INFO L482 AbstractCegarLoop]: Abstraction has 190550 states and 512435 transitions. [2021-07-09 16:31:09,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-07-09 16:31:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 190550 states and 512435 transitions. [2021-07-09 16:31:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-09 16:31:10,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:31:10,105 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:31:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:10,325 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:31:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:31:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash 64760262, now seen corresponding path program 71 times [2021-07-09 16:31:10,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:31:10,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832290315] [2021-07-09 16:31:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:31:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:31:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:31:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832290315] [2021-07-09 16:31:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832290315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329580201] [2021-07-09 16:31:10,484 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:11,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:31:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:31:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:31:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:31:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:31:11,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329580201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:11,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:31:11,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:31:11,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106099172] [2021-07-09 16:31:11,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:31:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:31:11,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:31:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:31:11,722 INFO L87 Difference]: Start difference. First operand 190550 states and 512435 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-07-09 16:31:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:31:13,529 INFO L93 Difference]: Finished difference Result 286290 states and 766535 transitions. [2021-07-09 16:31:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:31:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-07-09 16:31:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:31:14,372 INFO L225 Difference]: With dead ends: 286290 [2021-07-09 16:31:14,372 INFO L226 Difference]: Without dead ends: 286290 [2021-07-09 16:31:14,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:31:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286290 states. [2021-07-09 16:31:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286290 to 193450. [2021-07-09 16:31:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193450 states, 193448 states have (on average 2.68966337206898) internal successors, (520310), 193449 states have internal predecessors, (520310), 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) [2021-07-09 16:31:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193450 states to 193450 states and 520310 transitions. [2021-07-09 16:31:22,107 INFO L78 Accepts]: Start accepts. Automaton has 193450 states and 520310 transitions. Word has length 477 [2021-07-09 16:31:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:31:22,107 INFO L482 AbstractCegarLoop]: Abstraction has 193450 states and 520310 transitions. [2021-07-09 16:31:22,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-07-09 16:31:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 193450 states and 520310 transitions. [2021-07-09 16:31:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-09 16:31:23,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:31:23,029 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:31:23,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 16:31:23,242 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:31:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:31:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2100751524, now seen corresponding path program 72 times [2021-07-09 16:31:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:31:23,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211880800] [2021-07-09 16:31:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:31:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:31:23,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:31:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211880800] [2021-07-09 16:31:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211880800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977860339] [2021-07-09 16:31:23,437 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:23,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:31:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:31:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:31:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:31:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-09 16:31:24,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977860339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:24,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:31:24,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:31:24,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612644960] [2021-07-09 16:31:24,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:31:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:31:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:31:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:31:24,475 INFO L87 Difference]: Start difference. First operand 193450 states and 520310 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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) [2021-07-09 16:31:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:31:26,129 INFO L93 Difference]: Finished difference Result 270730 states and 724052 transitions. [2021-07-09 16:31:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:31:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 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 477 [2021-07-09 16:31:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:31:27,292 INFO L225 Difference]: With dead ends: 270730 [2021-07-09 16:31:27,292 INFO L226 Difference]: Without dead ends: 270730 [2021-07-09 16:31:27,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:31:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270730 states. Received shutdown request... [2021-07-09 16:31:28,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 16:31:28,784 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:28,784 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-09 16:31:28,786 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 16:31:28,789 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:31:28,790 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:31:28,790 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:31:28,790 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:31:28,790 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:31:28,790 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:31:28,790 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:31:28,790 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:31:28,796 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-09 16:31:28,796 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:28,797 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-09 16:31:28,797 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:31:28,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:31:28,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:31:28,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:31:28,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:31:28,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:31:28,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:31:28,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:31:28,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-09 16:31:28,800 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-09 16:31:28,816 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:28,816 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-09 16:31:28,816 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:31:28,818 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 16:31:28,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:31:28 BasicIcfg [2021-07-09 16:31:28,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:31:28,819 INFO L168 Benchmark]: Toolchain (without parser) took 746400.06 ms. Allocated memory was 234.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 197.6 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,819 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 234.9 MB. Free memory is still 215.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:31:28,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 497.50 ms. Allocated memory is still 234.9 MB. Free memory was 197.3 MB in the beginning and 199.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,819 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.54 ms. Allocated memory is still 234.9 MB. Free memory was 199.0 MB in the beginning and 196.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,819 INFO L168 Benchmark]: Boogie Preprocessor took 31.02 ms. Allocated memory is still 234.9 MB. Free memory was 196.4 MB in the beginning and 194.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,819 INFO L168 Benchmark]: RCFGBuilder took 452.53 ms. Allocated memory is still 234.9 MB. Free memory was 194.3 MB in the beginning and 160.2 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,820 INFO L168 Benchmark]: TraceAbstraction took 745339.98 ms. Allocated memory was 234.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 160.2 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-07-09 16:31:28,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 234.9 MB. Free memory is still 215.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 497.50 ms. Allocated memory is still 234.9 MB. Free memory was 197.3 MB in the beginning and 199.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 58.54 ms. Allocated memory is still 234.9 MB. Free memory was 199.0 MB in the beginning and 196.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.02 ms. Allocated memory is still 234.9 MB. Free memory was 196.4 MB in the beginning and 194.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 452.53 ms. Allocated memory is still 234.9 MB. Free memory was 194.3 MB in the beginning and 160.2 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 745339.98 ms. Allocated memory was 234.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 160.2 MB in the beginning and 5.7 GB in the end (delta: -5.5 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 152 places, 157 transitions, 336 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 745181.5ms, OverallIterations: 130, TraceHistogramMax: 13, EmptinessCheckTime: 40845.3ms, AutomataDifference: 169514.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 260.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20105 SDtfs, 186445 SDslu, 179030 SDs, 0 SdLazy, 16249 SolverSat, 2862 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9065.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52677 GetRequests, 48387 SyntacticMatches, 2 SemanticMatches, 4288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31931 ImplicationChecksByTransitivity, 34819.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=193710occurred in iteration=127, InterpolantAutomatonStates: 3361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 371483.3ms AutomataMinimizationTime, 130 MinimizatonAttempts, 4075067 StatesRemovedByMinimization, 129 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5106.0ms SsaConstructionTime, 33563.0ms SatisfiabilityAnalysisTime, 89172.3ms InterpolantComputationTime, 96055 NumberOfCodeBlocks, 95877 NumberOfCodeBlocksAsserted, 786 NumberOfCheckSat, 95799 ConstructedInterpolants, 0 QuantifiedInterpolants, 278730 SizeOfPredicates, 2310 NumberOfNonLiveVariables, 92143 ConjunctsInSsa, 2576 ConjunctsInUnsatCore, 256 InterpolantComputations, 5 PerfectInterpolantSequences, 19429/278426 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 7.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 18.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown