/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:19:44,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:19:44,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:19:44,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:19:44,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:19:44,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:19:44,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:19:44,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:19:44,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:19:44,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:19:44,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:19:44,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:19:44,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:19:44,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:19:44,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:19:44,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:19:44,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:19:44,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:19:44,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:19:44,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:19:44,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:19:44,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:19:44,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:19:44,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:19:44,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:19:44,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:19:44,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:19:44,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:19:44,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:19:44,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:19:44,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:19:44,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:19:44,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:19:44,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:19:44,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:19:44,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:19:44,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:19:44,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:19:44,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:19:44,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:19:44,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:19:44,560 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 16:19:44,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:19:44,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:19:44,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:19:44,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:19:44,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:19:44,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:19:44,590 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:19:44,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:19:44,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:19:44,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:19:44,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:19:44,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:19:44,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:19:44,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:19:44,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:19:44,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:19:44,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:19:44,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:19:44,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:19:44,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:19:44,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:19:44,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:19:44,851 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:19:44,852 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:19:44,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2021-07-09 16:19:44,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a120aa5/bf7a3bbf5558407886c5cfb72674a32b/FLAG232aceca5 [2021-07-09 16:19:45,312 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:19:45,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2021-07-09 16:19:45,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a120aa5/bf7a3bbf5558407886c5cfb72674a32b/FLAG232aceca5 [2021-07-09 16:19:45,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3a120aa5/bf7a3bbf5558407886c5cfb72674a32b [2021-07-09 16:19:45,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:19:45,629 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:19:45,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:19:45,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:19:45,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:19:45,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:19:45" (1/1) ... [2021-07-09 16:19:45,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1e4754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:45, skipping insertion in model container [2021-07-09 16:19:45,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:19:45" (1/1) ... [2021-07-09 16:19:45,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:19:45,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:19:45,952 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-2.i[41530,41543] [2021-07-09 16:19:45,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:19:45,972 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:19:45,991 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-2.i[41530,41543] [2021-07-09 16:19:45,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:19:46,051 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:19:46,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46 WrapperNode [2021-07-09 16:19:46,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:19:46,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:19:46,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:19:46,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:19:46,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:19:46,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:19:46,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:19:46,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:19:46,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (1/1) ... [2021-07-09 16:19:46,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:19:46,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:19:46,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:19:46,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:19:46,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (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 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:19:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:19:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 16:19:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:19:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-09 16:19:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:19:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:19:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:19:46,220 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 16:19:46,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:19:46,552 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-07-09 16:19:46,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:19:46 BoogieIcfgContainer [2021-07-09 16:19:46,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:19:46,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:19:46,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:19:46,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:19:46,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:19:45" (1/3) ... [2021-07-09 16:19:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b5a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:19:46, skipping insertion in model container [2021-07-09 16:19:46,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:19:46" (2/3) ... [2021-07-09 16:19:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b5a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:19:46, skipping insertion in model container [2021-07-09 16:19:46,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:19:46" (3/3) ... [2021-07-09 16:19:46,562 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2021-07-09 16:19:46,567 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:19:46,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:19:46,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-09 16:19:46,567 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,593 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,594 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,595 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,597 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,598 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,601 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,602 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,610 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,610 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,623 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,623 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:19:46,635 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 16:19:46,648 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:19:46,660 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:19:46,660 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:19:46,660 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:19:46,660 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:19:46,660 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:19:46,660 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:19:46,660 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:19:46,660 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-09 16:19:46,668 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:19:46,850 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 16:19:46,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:46,888 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 16:19:46,888 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -712665903, now seen corresponding path program 1 times [2021-07-09 16:19:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:46,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977581762] [2021-07-09 16:19:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:47,113 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 16:19:47,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:47,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977581762] [2021-07-09 16:19:47,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977581762] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:47,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:47,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:19:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438693305] [2021-07-09 16:19:47,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:19:47,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:19:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:47,143 INFO L87 Difference]: Start difference. First operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 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 16:19:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:47,290 INFO L93 Difference]: Finished difference Result 10818 states and 29690 transitions. [2021-07-09 16:19:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:19:47,292 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 16:19:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:47,356 INFO L225 Difference]: With dead ends: 10818 [2021-07-09 16:19:47,356 INFO L226 Difference]: Without dead ends: 10548 [2021-07-09 16:19:47,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10548 states. [2021-07-09 16:19:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10548 to 10224. [2021-07-09 16:19:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10222 states have (on average 2.759929563686167) internal successors, (28212), 10223 states have internal predecessors, (28212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 28212 transitions. [2021-07-09 16:19:47,814 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 28212 transitions. Word has length 54 [2021-07-09 16:19:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:47,815 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 28212 transitions. [2021-07-09 16:19:47,815 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 16:19:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 28212 transitions. [2021-07-09 16:19:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 16:19:47,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:47,822 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 16:19:47,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:19:47,822 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -89293531, now seen corresponding path program 1 times [2021-07-09 16:19:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:47,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301583552] [2021-07-09 16:19:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:47,915 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 16:19:47,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:47,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301583552] [2021-07-09 16:19:47,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301583552] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:47,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:47,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 16:19:47,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500115132] [2021-07-09 16:19:47,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 16:19:47,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 16:19:47,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 16:19:47,917 INFO L87 Difference]: Start difference. First operand 10224 states and 28212 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 16:19:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:48,102 INFO L93 Difference]: Finished difference Result 15012 states and 41360 transitions. [2021-07-09 16:19:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 16:19:48,113 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 16:19:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:48,211 INFO L225 Difference]: With dead ends: 15012 [2021-07-09 16:19:48,211 INFO L226 Difference]: Without dead ends: 15012 [2021-07-09 16:19:48,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 16:19:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15012 states. [2021-07-09 16:19:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15012 to 10980. [2021-07-09 16:19:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10978 states have (on average 2.7589724904354163) internal successors, (30288), 10979 states have internal predecessors, (30288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 30288 transitions. [2021-07-09 16:19:48,590 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 30288 transitions. Word has length 63 [2021-07-09 16:19:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:48,590 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 30288 transitions. [2021-07-09 16:19:48,590 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 16:19:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 30288 transitions. [2021-07-09 16:19:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-09 16:19:48,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:48,602 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] [2021-07-09 16:19:48,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:19:48,602 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash -835995566, now seen corresponding path program 1 times [2021-07-09 16:19:48,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:48,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420413078] [2021-07-09 16:19:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:48,697 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 16:19:48,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:48,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420413078] [2021-07-09 16:19:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420413078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:48,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660925501] [2021-07-09 16:19:48,697 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 16:19:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:19:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:49,131 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 16:19:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660925501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:49,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:49,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 16:19:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119559871] [2021-07-09 16:19:49,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:19:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:19:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:19:49,135 INFO L87 Difference]: Start difference. First operand 10980 states and 30288 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:49,383 INFO L93 Difference]: Finished difference Result 18555 states and 50921 transitions. [2021-07-09 16:19:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 16:19:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 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 88 [2021-07-09 16:19:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:49,430 INFO L225 Difference]: With dead ends: 18555 [2021-07-09 16:19:49,430 INFO L226 Difference]: Without dead ends: 18555 [2021-07-09 16:19:49,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-07-09 16:19:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 14604. [2021-07-09 16:19:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14604 states, 14602 states have (on average 2.753116011505273) internal successors, (40201), 14603 states have internal predecessors, (40201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 40201 transitions. [2021-07-09 16:19:49,836 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 40201 transitions. Word has length 88 [2021-07-09 16:19:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:49,838 INFO L482 AbstractCegarLoop]: Abstraction has 14604 states and 40201 transitions. [2021-07-09 16:19:49,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 40201 transitions. [2021-07-09 16:19:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-09 16:19:49,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:49,860 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] [2021-07-09 16:19:50,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 16:19:50,073 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1529144013, now seen corresponding path program 1 times [2021-07-09 16:19:50,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:50,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731039827] [2021-07-09 16:19:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 16:19:50,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:50,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731039827] [2021-07-09 16:19:50,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731039827] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:19:50,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:19:50,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:19:50,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164707071] [2021-07-09 16:19:50,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:19:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:19:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:50,123 INFO L87 Difference]: Start difference. First operand 14604 states and 40201 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:50,208 INFO L93 Difference]: Finished difference Result 6196 states and 15963 transitions. [2021-07-09 16:19:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:19:50,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 109 [2021-07-09 16:19:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:50,222 INFO L225 Difference]: With dead ends: 6196 [2021-07-09 16:19:50,222 INFO L226 Difference]: Without dead ends: 6076 [2021-07-09 16:19:50,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:19:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-07-09 16:19:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5876. [2021-07-09 16:19:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5874 states have (on average 2.5718420156622406) internal successors, (15107), 5875 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 15107 transitions. [2021-07-09 16:19:50,347 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 15107 transitions. Word has length 109 [2021-07-09 16:19:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:50,350 INFO L482 AbstractCegarLoop]: Abstraction has 5876 states and 15107 transitions. [2021-07-09 16:19:50,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 15107 transitions. [2021-07-09 16:19:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-09 16:19:50,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:50,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:50,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:19:50,362 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1832797293, now seen corresponding path program 2 times [2021-07-09 16:19:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:50,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777559652] [2021-07-09 16:19:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:50,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777559652] [2021-07-09 16:19:50,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777559652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507863538] [2021-07-09 16:19:50,443 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 16:19:50,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:50,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:50,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:19:50,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507863538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:50,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:50,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 16:19:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283204426] [2021-07-09 16:19:50,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 16:19:50,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 16:19:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:19:50,776 INFO L87 Difference]: Start difference. First operand 5876 states and 15107 transitions. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:50,905 INFO L93 Difference]: Finished difference Result 9595 states and 24725 transitions. [2021-07-09 16:19:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:19:50,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 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 122 [2021-07-09 16:19:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:50,927 INFO L225 Difference]: With dead ends: 9595 [2021-07-09 16:19:50,927 INFO L226 Difference]: Without dead ends: 9595 [2021-07-09 16:19:50,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9595 states. [2021-07-09 16:19:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9595 to 7678. [2021-07-09 16:19:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7676 states have (on average 2.568655549765503) internal successors, (19717), 7677 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 19717 transitions. [2021-07-09 16:19:51,079 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 19717 transitions. Word has length 122 [2021-07-09 16:19:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:51,080 INFO L482 AbstractCegarLoop]: Abstraction has 7678 states and 19717 transitions. [2021-07-09 16:19:51,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 19717 transitions. [2021-07-09 16:19:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-07-09 16:19:51,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:51,094 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] [2021-07-09 16:19:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:51,309 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 989155091, now seen corresponding path program 1 times [2021-07-09 16:19:51,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:51,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909157933] [2021-07-09 16:19:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:51,402 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 16:19:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909157933] [2021-07-09 16:19:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909157933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586540158] [2021-07-09 16:19:51,403 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 16:19:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:19:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:51,692 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 16:19:51,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586540158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:51,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:51,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 16:19:51,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466133128] [2021-07-09 16:19:51,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:19:51,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:19:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:19:51,694 INFO L87 Difference]: Start difference. First operand 7678 states and 19717 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 16:19:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:51,821 INFO L93 Difference]: Finished difference Result 11373 states and 29306 transitions. [2021-07-09 16:19:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:19:51,821 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 123 [2021-07-09 16:19:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:51,843 INFO L225 Difference]: With dead ends: 11373 [2021-07-09 16:19:51,844 INFO L226 Difference]: Without dead ends: 11373 [2021-07-09 16:19:51,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-07-09 16:19:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8938. [2021-07-09 16:19:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8936 states have (on average 2.5924350940017904) internal successors, (23166), 8937 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 23166 transitions. [2021-07-09 16:19:52,014 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 23166 transitions. Word has length 123 [2021-07-09 16:19:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:52,014 INFO L482 AbstractCegarLoop]: Abstraction has 8938 states and 23166 transitions. [2021-07-09 16:19:52,014 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 16:19:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 23166 transitions. [2021-07-09 16:19:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-07-09 16:19:52,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:52,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:52,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:52,329 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1495248532, now seen corresponding path program 3 times [2021-07-09 16:19:52,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:52,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500829316] [2021-07-09 16:19:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:52,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:52,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500829316] [2021-07-09 16:19:52,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500829316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:52,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851806280] [2021-07-09 16:19:52,412 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 16:19:52,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:19:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:19:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851806280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:52,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:52,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 16:19:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890359548] [2021-07-09 16:19:52,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:19:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:19:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:19:52,781 INFO L87 Difference]: Start difference. First operand 8938 states and 23166 transitions. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:52,963 INFO L93 Difference]: Finished difference Result 13937 states and 35971 transitions. [2021-07-09 16:19:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:19:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 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 156 [2021-07-09 16:19:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:52,988 INFO L225 Difference]: With dead ends: 13937 [2021-07-09 16:19:52,988 INFO L226 Difference]: Without dead ends: 13937 [2021-07-09 16:19:52,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:19:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2021-07-09 16:19:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 10740. [2021-07-09 16:19:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 10738 states have (on average 2.5867014341590613) internal successors, (27776), 10739 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 27776 transitions. [2021-07-09 16:19:53,194 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 27776 transitions. Word has length 156 [2021-07-09 16:19:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:53,195 INFO L482 AbstractCegarLoop]: Abstraction has 10740 states and 27776 transitions. [2021-07-09 16:19:53,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 27776 transitions. [2021-07-09 16:19:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-07-09 16:19:53,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:53,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:53,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:53,424 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 43164722, now seen corresponding path program 2 times [2021-07-09 16:19:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:53,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888145134] [2021-07-09 16:19:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:53,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888145134] [2021-07-09 16:19:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888145134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:53,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802269429] [2021-07-09 16:19:53,489 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 16:19:53,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:53,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:19:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:53,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802269429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:53,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:53,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:19:53,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499837719] [2021-07-09 16:19:53,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:19:53,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:19:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:19:53,787 INFO L87 Difference]: Start difference. First operand 10740 states and 27776 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:54,024 INFO L93 Difference]: Finished difference Result 15875 states and 41000 transitions. [2021-07-09 16:19:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 16:19:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-07-09 16:19:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:54,050 INFO L225 Difference]: With dead ends: 15875 [2021-07-09 16:19:54,050 INFO L226 Difference]: Without dead ends: 15875 [2021-07-09 16:19:54,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2021-07-09 16:19:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 12000. [2021-07-09 16:19:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12000 states, 11998 states have (on average 2.60251708618103) internal successors, (31225), 11999 states have internal predecessors, (31225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12000 states to 12000 states and 31225 transitions. [2021-07-09 16:19:54,278 INFO L78 Accepts]: Start accepts. Automaton has 12000 states and 31225 transitions. Word has length 157 [2021-07-09 16:19:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:54,278 INFO L482 AbstractCegarLoop]: Abstraction has 12000 states and 31225 transitions. [2021-07-09 16:19:54,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12000 states and 31225 transitions. [2021-07-09 16:19:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-07-09 16:19:54,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:54,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:54,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:54,521 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396245, now seen corresponding path program 4 times [2021-07-09 16:19:54,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:54,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42845703] [2021-07-09 16:19:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:54,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:54,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42845703] [2021-07-09 16:19:54,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42845703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:54,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760117495] [2021-07-09 16:19:54,639 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 16:19:54,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:54,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:19:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760117495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:55,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:55,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:19:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469665187] [2021-07-09 16:19:55,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:19:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:19:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:55,002 INFO L87 Difference]: Start difference. First operand 12000 states and 31225 transitions. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:55,210 INFO L93 Difference]: Finished difference Result 17199 states and 44580 transitions. [2021-07-09 16:19:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:19:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 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 190 [2021-07-09 16:19:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:55,242 INFO L225 Difference]: With dead ends: 17199 [2021-07-09 16:19:55,242 INFO L226 Difference]: Without dead ends: 17199 [2021-07-09 16:19:55,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:19:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-07-09 16:19:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 13802. [2021-07-09 16:19:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:19:55,557 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 190 [2021-07-09 16:19:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:55,557 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:19:55,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:19:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-09 16:19:55,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:55,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:55,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:55,793 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash 704345301, now seen corresponding path program 3 times [2021-07-09 16:19:55,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:55,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944165546] [2021-07-09 16:19:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:19:55,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:55,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944165546] [2021-07-09 16:19:55,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944165546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:55,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270992198] [2021-07-09 16:19:55,897 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 16:19:56,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:19:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:56,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:19:56,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:56,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270992198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:56,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:56,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 16:19:56,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329512363] [2021-07-09 16:19:56,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:19:56,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:19:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:19:56,268 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:56,427 INFO L93 Difference]: Finished difference Result 17787 states and 46053 transitions. [2021-07-09 16:19:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 16:19:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 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 191 [2021-07-09 16:19:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:56,456 INFO L225 Difference]: With dead ends: 17787 [2021-07-09 16:19:56,457 INFO L226 Difference]: Without dead ends: 17787 [2021-07-09 16:19:56,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-07-09 16:19:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 13802. [2021-07-09 16:19:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:19:56,687 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-09 16:19:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:56,687 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:19:56,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:19:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-09 16:19:56,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:56,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:56,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:19:56,926 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:56,926 INFO L82 PathProgramCache]: Analyzing trace with hash 249164177, now seen corresponding path program 4 times [2021-07-09 16:19:56,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:56,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680079332] [2021-07-09 16:19:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680079332] [2021-07-09 16:19:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680079332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125503291] [2021-07-09 16:19:57,021 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 16:19:57,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:57,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:57,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:19:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:57,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125503291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:57,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:57,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:19:57,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536472232] [2021-07-09 16:19:57,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:19:57,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:57,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:19:57,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:19:57,507 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:57,741 INFO L93 Difference]: Finished difference Result 19137 states and 49609 transitions. [2021-07-09 16:19:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:19:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 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 191 [2021-07-09 16:19:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:57,771 INFO L225 Difference]: With dead ends: 19137 [2021-07-09 16:19:57,771 INFO L226 Difference]: Without dead ends: 19137 [2021-07-09 16:19:57,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:19:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19137 states. [2021-07-09 16:19:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19137 to 13802. [2021-07-09 16:19:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:19:58,038 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-09 16:19:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:58,039 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:19:58,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:19:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-07-09 16:19:58,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:58,057 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, 2, 2, 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 16:19:58,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 16:19:58,267 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1316096157, now seen corresponding path program 1 times [2021-07-09 16:19:58,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:58,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103422706] [2021-07-09 16:19:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 148 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-09 16:19:58,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:58,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103422706] [2021-07-09 16:19:58,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103422706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:58,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60580105] [2021-07-09 16:19:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:19:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:19:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:19:58,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60580105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:58,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:58,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-09 16:19:58,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240872895] [2021-07-09 16:19:58,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:19:58,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:58,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:19:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:19:58,771 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:58,998 INFO L93 Difference]: Finished difference Result 24997 states and 64918 transitions. [2021-07-09 16:19:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:19:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-07-09 16:19:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:59,045 INFO L225 Difference]: With dead ends: 24997 [2021-07-09 16:19:59,045 INFO L226 Difference]: Without dead ends: 24997 [2021-07-09 16:19:59,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:19:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24997 states. [2021-07-09 16:19:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24997 to 14962. [2021-07-09 16:19:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14960 states have (on average 2.606216577540107) internal successors, (38989), 14961 states have internal predecessors, (38989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 38989 transitions. [2021-07-09 16:19:59,404 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 38989 transitions. Word has length 220 [2021-07-09 16:19:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:59,404 INFO L482 AbstractCegarLoop]: Abstraction has 14962 states and 38989 transitions. [2021-07-09 16:19:59,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 38989 transitions. [2021-07-09 16:19:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-07-09 16:19:59,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:59,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:59,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:59,626 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1317035050, now seen corresponding path program 5 times [2021-07-09 16:19:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:59,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687835664] [2021-07-09 16:19:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:59,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687835664] [2021-07-09 16:19:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687835664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:59,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007963500] [2021-07-09 16:19:59,745 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 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 16:19:59,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 16:19:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:19:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007963500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:20:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971091822] [2021-07-09 16:20:00,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:00,165 INFO L87 Difference]: Start difference. First operand 14962 states and 38989 transitions. Second operand has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 16:20:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:00,407 INFO L93 Difference]: Finished difference Result 20871 states and 54084 transitions. [2021-07-09 16:20:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:20:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 224 [2021-07-09 16:20:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:00,441 INFO L225 Difference]: With dead ends: 20871 [2021-07-09 16:20:00,441 INFO L226 Difference]: Without dead ends: 20871 [2021-07-09 16:20:00,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:20:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-07-09 16:20:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 16764. [2021-07-09 16:20:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 16762 states have (on average 2.6010619257845127) internal successors, (43599), 16763 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 43599 transitions. [2021-07-09 16:20:00,728 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 43599 transitions. Word has length 224 [2021-07-09 16:20:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:00,729 INFO L482 AbstractCegarLoop]: Abstraction has 16764 states and 43599 transitions. [2021-07-09 16:20:00,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 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 16:20:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 43599 transitions. [2021-07-09 16:20:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:20:00,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:00,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:00,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:00,969 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 143431510, now seen corresponding path program 5 times [2021-07-09 16:20:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:00,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593358316] [2021-07-09 16:20:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:20:01,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:01,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593358316] [2021-07-09 16:20:01,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593358316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:01,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125909303] [2021-07-09 16:20:01,079 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 16:20:01,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:20:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:20:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:01,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125909303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:01,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:01,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-09 16:20:01,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280399660] [2021-07-09 16:20:01,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:20:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:20:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:20:01,498 INFO L87 Difference]: Start difference. First operand 16764 states and 43599 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:01,709 INFO L93 Difference]: Finished difference Result 23844 states and 61943 transitions. [2021-07-09 16:20:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:20:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 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 225 [2021-07-09 16:20:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:01,748 INFO L225 Difference]: With dead ends: 23844 [2021-07-09 16:20:01,749 INFO L226 Difference]: Without dead ends: 23844 [2021-07-09 16:20:01,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:20:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23844 states. [2021-07-09 16:20:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23844 to 18704. [2021-07-09 16:20:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18702 states have (on average 2.6167254839054648) internal successors, (48938), 18703 states have internal predecessors, (48938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 48938 transitions. [2021-07-09 16:20:02,086 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 48938 transitions. Word has length 225 [2021-07-09 16:20:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:02,086 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 48938 transitions. [2021-07-09 16:20:02,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 48938 transitions. [2021-07-09 16:20:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:20:02,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:02,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 16:20:02,311 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1063343500, now seen corresponding path program 6 times [2021-07-09 16:20:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473769918] [2021-07-09 16:20:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:02,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473769918] [2021-07-09 16:20:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473769918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:02,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953863316] [2021-07-09 16:20:02,507 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 16:20:02,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:20:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:20:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953863316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:02,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:02,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:20:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117563749] [2021-07-09 16:20:02,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:20:02,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:02,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:20:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:20:02,936 INFO L87 Difference]: Start difference. First operand 18704 states and 48938 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:03,172 INFO L93 Difference]: Finished difference Result 30389 states and 79003 transitions. [2021-07-09 16:20:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:20:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 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 225 [2021-07-09 16:20:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:03,235 INFO L225 Difference]: With dead ends: 30389 [2021-07-09 16:20:03,235 INFO L226 Difference]: Without dead ends: 30389 [2021-07-09 16:20:03,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:20:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2021-07-09 16:20:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19964. [2021-07-09 16:20:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:20:03,663 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-09 16:20:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:03,663 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:20:03,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:20:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:20:03,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:03,688 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:20:03,889 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1518524624, now seen corresponding path program 7 times [2021-07-09 16:20:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196340631] [2021-07-09 16:20:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:20:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196340631] [2021-07-09 16:20:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196340631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342845384] [2021-07-09 16:20:04,004 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 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 16:20:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:20:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:20:04,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342845384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:04,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:04,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:20:04,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080957377] [2021-07-09 16:20:04,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:20:04,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:04,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:20:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:20:04,352 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:04,636 INFO L93 Difference]: Finished difference Result 29709 states and 77502 transitions. [2021-07-09 16:20:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:04,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 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 225 [2021-07-09 16:20:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:04,694 INFO L225 Difference]: With dead ends: 29709 [2021-07-09 16:20:04,694 INFO L226 Difference]: Without dead ends: 29709 [2021-07-09 16:20:04,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:20:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2021-07-09 16:20:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 19964. [2021-07-09 16:20:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:20:05,057 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-09 16:20:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:20:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:20:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-09 16:20:05,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:05,193 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, 2, 2, 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 16:20:05,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:20:05,394 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1023520124, now seen corresponding path program 2 times [2021-07-09 16:20:05,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:05,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117874595] [2021-07-09 16:20:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 265 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-09 16:20:05,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117874595] [2021-07-09 16:20:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117874595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397595872] [2021-07-09 16:20:05,545 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 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 16:20:05,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:05,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:20:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:20:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397595872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:05,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 16:20:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023434272] [2021-07-09 16:20:05,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:20:05,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:20:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:20:05,929 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:06,192 INFO L93 Difference]: Finished difference Result 33419 states and 87480 transitions. [2021-07-09 16:20:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:20:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 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 254 [2021-07-09 16:20:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:06,255 INFO L225 Difference]: With dead ends: 33419 [2021-07-09 16:20:06,255 INFO L226 Difference]: Without dead ends: 33419 [2021-07-09 16:20:06,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:20:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-07-09 16:20:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 19964. [2021-07-09 16:20:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:20:06,634 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 254 [2021-07-09 16:20:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:06,634 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:20:06,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:20:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-09 16:20:06,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:06,661 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, 2, 2, 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 16:20:06,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:06,868 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash -378172578, now seen corresponding path program 3 times [2021-07-09 16:20:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:06,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792591630] [2021-07-09 16:20:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:20:06,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:06,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792591630] [2021-07-09 16:20:06,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792591630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:06,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307944412] [2021-07-09 16:20:06,966 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 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 16:20:07,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:20:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:20:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-09 16:20:07,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307944412] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:20:07,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:20:07,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-07-09 16:20:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341562795] [2021-07-09 16:20:07,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:20:07,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:20:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:07,360 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:07,543 INFO L93 Difference]: Finished difference Result 26914 states and 70438 transitions. [2021-07-09 16:20:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 16:20:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 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 254 [2021-07-09 16:20:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:07,596 INFO L225 Difference]: With dead ends: 26914 [2021-07-09 16:20:07,596 INFO L226 Difference]: Without dead ends: 26914 [2021-07-09 16:20:07,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:20:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-07-09 16:20:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 20644. [2021-07-09 16:20:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20644 states, 20642 states have (on average 2.627700804185641) internal successors, (54241), 20643 states have internal predecessors, (54241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20644 states to 20644 states and 54241 transitions. [2021-07-09 16:20:08,099 INFO L78 Accepts]: Start accepts. Automaton has 20644 states and 54241 transitions. Word has length 254 [2021-07-09 16:20:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:08,100 INFO L482 AbstractCegarLoop]: Abstraction has 20644 states and 54241 transitions. [2021-07-09 16:20:08,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20644 states and 54241 transitions. [2021-07-09 16:20:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-07-09 16:20:08,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:08,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:08,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:20:08,328 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -518142441, now seen corresponding path program 6 times [2021-07-09 16:20:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:08,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632843329] [2021-07-09 16:20:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:08,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:08,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632843329] [2021-07-09 16:20:08,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632843329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:08,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547152073] [2021-07-09 16:20:08,468 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 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 16:20:08,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:20:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:20:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:09,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547152073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:09,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:09,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:09,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117713557] [2021-07-09 16:20:09,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:09,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:09,019 INFO L87 Difference]: Start difference. First operand 20644 states and 54241 transitions. Second operand has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:09,337 INFO L93 Difference]: Finished difference Result 27943 states and 72966 transitions. [2021-07-09 16:20:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:20:09,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 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 258 [2021-07-09 16:20:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:09,386 INFO L225 Difference]: With dead ends: 27943 [2021-07-09 16:20:09,386 INFO L226 Difference]: Without dead ends: 27943 [2021-07-09 16:20:09,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:20:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27943 states. [2021-07-09 16:20:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27943 to 22446. [2021-07-09 16:20:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22446 states, 22444 states have (on average 2.62212618071645) internal successors, (58851), 22445 states have internal predecessors, (58851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 58851 transitions. [2021-07-09 16:20:09,826 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 58851 transitions. Word has length 258 [2021-07-09 16:20:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 22446 states and 58851 transitions. [2021-07-09 16:20:09,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 58851 transitions. [2021-07-09 16:20:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:20:09,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:09,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:10,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:10,055 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1618093673, now seen corresponding path program 8 times [2021-07-09 16:20:10,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:10,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95872560] [2021-07-09 16:20:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 404 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:20:10,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:10,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95872560] [2021-07-09 16:20:10,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95872560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:10,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456204644] [2021-07-09 16:20:10,184 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 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 16:20:10,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:20:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:10,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456204644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:10,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:10,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 16:20:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060199401] [2021-07-09 16:20:10,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:20:10,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:20:10,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:20:10,625 INFO L87 Difference]: Start difference. First operand 22446 states and 58851 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:10,888 INFO L93 Difference]: Finished difference Result 29176 states and 76036 transitions. [2021-07-09 16:20:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:20:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 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 259 [2021-07-09 16:20:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:10,941 INFO L225 Difference]: With dead ends: 29176 [2021-07-09 16:20:10,941 INFO L226 Difference]: Without dead ends: 29176 [2021-07-09 16:20:10,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:20:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2021-07-09 16:20:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 23126. [2021-07-09 16:20:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23126 states, 23124 states have (on average 2.626751427088739) internal successors, (60741), 23125 states have internal predecessors, (60741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 60741 transitions. [2021-07-09 16:20:11,325 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 60741 transitions. Word has length 259 [2021-07-09 16:20:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 23126 states and 60741 transitions. [2021-07-09 16:20:11,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 60741 transitions. [2021-07-09 16:20:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:20:11,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:11,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:11,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:11,556 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash -155081419, now seen corresponding path program 9 times [2021-07-09 16:20:11,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:11,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254380588] [2021-07-09 16:20:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:11,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:11,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254380588] [2021-07-09 16:20:11,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254380588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:11,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284954279] [2021-07-09 16:20:11,658 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 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 16:20:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 16:20:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:20:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:12,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284954279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:12,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:12,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:20:12,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300531323] [2021-07-09 16:20:12,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:20:12,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:20:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:20:12,145 INFO L87 Difference]: Start difference. First operand 23126 states and 60741 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:12,512 INFO L93 Difference]: Finished difference Result 34101 states and 89002 transitions. [2021-07-09 16:20:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:20:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 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 259 [2021-07-09 16:20:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:12,574 INFO L225 Difference]: With dead ends: 34101 [2021-07-09 16:20:12,574 INFO L226 Difference]: Without dead ends: 34101 [2021-07-09 16:20:12,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:20:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-07-09 16:20:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 25066. [2021-07-09 16:20:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25066 states, 25064 states have (on average 2.6364506862432173) internal successors, (66080), 25065 states have internal predecessors, (66080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25066 states to 25066 states and 66080 transitions. [2021-07-09 16:20:13,028 INFO L78 Accepts]: Start accepts. Automaton has 25066 states and 66080 transitions. Word has length 259 [2021-07-09 16:20:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:13,028 INFO L482 AbstractCegarLoop]: Abstraction has 25066 states and 66080 transitions. [2021-07-09 16:20:13,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 25066 states and 66080 transitions. [2021-07-09 16:20:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:20:13,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:13,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:13,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:20:13,260 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1361856429, now seen corresponding path program 10 times [2021-07-09 16:20:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:13,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343746681] [2021-07-09 16:20:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:13,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343746681] [2021-07-09 16:20:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343746681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:13,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818590903] [2021-07-09 16:20:13,357 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 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 16:20:13,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:20:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818590903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:20:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196068601] [2021-07-09 16:20:13,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:20:13,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:20:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:20:13,843 INFO L87 Difference]: Start difference. First operand 25066 states and 66080 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:14,144 INFO L93 Difference]: Finished difference Result 34341 states and 90071 transitions. [2021-07-09 16:20:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:20:14,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 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 259 [2021-07-09 16:20:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:14,210 INFO L225 Difference]: With dead ends: 34341 [2021-07-09 16:20:14,210 INFO L226 Difference]: Without dead ends: 34341 [2021-07-09 16:20:14,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:20:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34341 states. [2021-07-09 16:20:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34341 to 26326. [2021-07-09 16:20:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26324 states have (on average 2.641277921288558) internal successors, (69529), 26325 states have internal predecessors, (69529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 69529 transitions. [2021-07-09 16:20:14,715 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 69529 transitions. Word has length 259 [2021-07-09 16:20:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:14,715 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 69529 transitions. [2021-07-09 16:20:14,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 69529 transitions. [2021-07-09 16:20:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-07-09 16:20:14,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:14,755 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, 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 16:20:14,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:14,956 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1010690922, now seen corresponding path program 4 times [2021-07-09 16:20:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:14,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067886138] [2021-07-09 16:20:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-09 16:20:15,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:15,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067886138] [2021-07-09 16:20:15,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067886138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:15,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500447609] [2021-07-09 16:20:15,080 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 16:20:15,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:15,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-09 16:20:15,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500447609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:15,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:15,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:20:15,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753796159] [2021-07-09 16:20:15,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:20:15,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:15,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:20:15,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:20:15,612 INFO L87 Difference]: Start difference. First operand 26326 states and 69529 transitions. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:15,901 INFO L93 Difference]: Finished difference Result 41691 states and 109020 transitions. [2021-07-09 16:20:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:20:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 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 283 [2021-07-09 16:20:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:15,981 INFO L225 Difference]: With dead ends: 41691 [2021-07-09 16:20:15,982 INFO L226 Difference]: Without dead ends: 41691 [2021-07-09 16:20:15,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:20:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41691 states. [2021-07-09 16:20:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41691 to 29426. [2021-07-09 16:20:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29424 states have (on average 2.6516449157150626) internal successors, (78022), 29425 states have internal predecessors, (78022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 78022 transitions. [2021-07-09 16:20:16,630 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 78022 transitions. Word has length 283 [2021-07-09 16:20:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:16,630 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 78022 transitions. [2021-07-09 16:20:16,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 78022 transitions. [2021-07-09 16:20:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-09 16:20:16,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:16,672 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, 2, 2, 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 16:20:16,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:20:16,873 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1176701279, now seen corresponding path program 5 times [2021-07-09 16:20:16,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:16,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60387055] [2021-07-09 16:20:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 396 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:16,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60387055] [2021-07-09 16:20:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60387055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261632791] [2021-07-09 16:20:16,974 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 16:20:17,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 16:20:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 373 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:17,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261632791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:17,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:17,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 16:20:17,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523730807] [2021-07-09 16:20:17,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:20:17,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:17,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:20:17,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:20:17,431 INFO L87 Difference]: Start difference. First operand 29426 states and 78022 transitions. Second operand has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:17,701 INFO L93 Difference]: Finished difference Result 39436 states and 103060 transitions. [2021-07-09 16:20:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:20:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 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 288 [2021-07-09 16:20:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:17,782 INFO L225 Difference]: With dead ends: 39436 [2021-07-09 16:20:17,783 INFO L226 Difference]: Without dead ends: 39436 [2021-07-09 16:20:17,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:20:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39436 states. [2021-07-09 16:20:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39436 to 27486. [2021-07-09 16:20:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27486 states, 27484 states have (on average 2.6445568330665115) internal successors, (72683), 27485 states have internal predecessors, (72683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 72683 transitions. [2021-07-09 16:20:18,326 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 72683 transitions. Word has length 288 [2021-07-09 16:20:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:18,326 INFO L482 AbstractCegarLoop]: Abstraction has 27486 states and 72683 transitions. [2021-07-09 16:20:18,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 72683 transitions. [2021-07-09 16:20:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-09 16:20:18,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:18,364 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, 2, 2, 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 16:20:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 16:20:18,577 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 129283205, now seen corresponding path program 6 times [2021-07-09 16:20:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008248139] [2021-07-09 16:20:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 54 proven. 388 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:20:18,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:18,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008248139] [2021-07-09 16:20:18,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008248139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:18,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808318944] [2021-07-09 16:20:18,704 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 16:20:18,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:20:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:20:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 250 proven. 59 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-09 16:20:19,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808318944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:19,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:19,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-07-09 16:20:19,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850939578] [2021-07-09 16:20:19,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:20:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:20:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:20:19,263 INFO L87 Difference]: Start difference. First operand 27486 states and 72683 transitions. Second operand has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:20,066 INFO L93 Difference]: Finished difference Result 56766 states and 149064 transitions. [2021-07-09 16:20:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:20:20,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 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 288 [2021-07-09 16:20:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:20,189 INFO L225 Difference]: With dead ends: 56766 [2021-07-09 16:20:20,190 INFO L226 Difference]: Without dead ends: 56766 [2021-07-09 16:20:20,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 16:20:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56766 states. [2021-07-09 16:20:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56766 to 30626. [2021-07-09 16:20:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30626 states, 30624 states have (on average 2.658894984326019) internal successors, (81426), 30625 states have internal predecessors, (81426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 81426 transitions. [2021-07-09 16:20:20,906 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 81426 transitions. Word has length 288 [2021-07-09 16:20:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:20,906 INFO L482 AbstractCegarLoop]: Abstraction has 30626 states and 81426 transitions. [2021-07-09 16:20:20,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 81426 transitions. [2021-07-09 16:20:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-07-09 16:20:20,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:20,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:21,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:21,150 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1883498472, now seen corresponding path program 7 times [2021-07-09 16:20:21,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:21,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737416935] [2021-07-09 16:20:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:21,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:21,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737416935] [2021-07-09 16:20:21,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737416935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:21,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457355580] [2021-07-09 16:20:21,286 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 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 16:20:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:21,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457355580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:21,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:21,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:20:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464688834] [2021-07-09 16:20:21,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:20:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:20:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:20:21,716 INFO L87 Difference]: Start difference. First operand 30626 states and 81426 transitions. Second operand has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:22,086 INFO L93 Difference]: Finished difference Result 39095 states and 103168 transitions. [2021-07-09 16:20:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:20:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 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 292 [2021-07-09 16:20:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:22,157 INFO L225 Difference]: With dead ends: 39095 [2021-07-09 16:20:22,157 INFO L226 Difference]: Without dead ends: 39095 [2021-07-09 16:20:22,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:20:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39095 states. [2021-07-09 16:20:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 33108. [2021-07-09 16:20:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-09 16:20:22,762 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 292 [2021-07-09 16:20:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:22,762 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-09 16:20:22,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-09 16:20:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:20:22,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:22,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:23,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 16:20:23,006 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 885476248, now seen corresponding path program 11 times [2021-07-09 16:20:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:23,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168405540] [2021-07-09 16:20:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 589 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:20:23,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168405540] [2021-07-09 16:20:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168405540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643738763] [2021-07-09 16:20:23,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:23,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:20:23,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:24,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643738763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:24,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:24,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:20:24,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060158704] [2021-07-09 16:20:24,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:20:24,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:20:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:20:24,183 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:24,497 INFO L93 Difference]: Finished difference Result 41038 states and 107978 transitions. [2021-07-09 16:20:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 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 293 [2021-07-09 16:20:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:24,625 INFO L225 Difference]: With dead ends: 41038 [2021-07-09 16:20:24,625 INFO L226 Difference]: Without dead ends: 41038 [2021-07-09 16:20:24,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:20:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41038 states. [2021-07-09 16:20:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41038 to 33108. [2021-07-09 16:20:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-09 16:20:25,312 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 293 [2021-07-09 16:20:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:25,313 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-09 16:20:25,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-09 16:20:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:20:25,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:25,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:25,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:25,558 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1494134710, now seen corresponding path program 12 times [2021-07-09 16:20:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:25,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843746163] [2021-07-09 16:20:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:25,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843746163] [2021-07-09 16:20:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843746163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:25,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685285814] [2021-07-09 16:20:25,669 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 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 16:20:25,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:20:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:25,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:26,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685285814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:26,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:26,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:20:26,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080692556] [2021-07-09 16:20:26,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:20:26,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:20:26,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:20:26,377 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:26,778 INFO L93 Difference]: Finished difference Result 46473 states and 122134 transitions. [2021-07-09 16:20:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:26,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 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 293 [2021-07-09 16:20:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:26,857 INFO L225 Difference]: With dead ends: 46473 [2021-07-09 16:20:26,857 INFO L226 Difference]: Without dead ends: 46473 [2021-07-09 16:20:26,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:20:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46473 states. [2021-07-09 16:20:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46473 to 34368. [2021-07-09 16:20:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-07-09 16:20:27,629 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 293 [2021-07-09 16:20:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:27,629 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-07-09 16:20:27,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-07-09 16:20:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:20:27,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:27,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:27,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 16:20:27,872 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1337820332, now seen corresponding path program 13 times [2021-07-09 16:20:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:27,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403549841] [2021-07-09 16:20:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:27,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403549841] [2021-07-09 16:20:27,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403549841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149161744] [2021-07-09 16:20:27,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:28,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:20:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149161744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:28,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:28,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:20:28,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104533395] [2021-07-09 16:20:28,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:20:28,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:20:28,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:20:28,555 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:28,979 INFO L93 Difference]: Finished difference Result 46513 states and 122653 transitions. [2021-07-09 16:20:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:20:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 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 293 [2021-07-09 16:20:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:29,057 INFO L225 Difference]: With dead ends: 46513 [2021-07-09 16:20:29,057 INFO L226 Difference]: Without dead ends: 46513 [2021-07-09 16:20:29,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:20:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-07-09 16:20:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 36308. [2021-07-09 16:20:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-09 16:20:29,712 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 293 [2021-07-09 16:20:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:29,712 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-09 16:20:29,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-09 16:20:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:20:29,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:29,762 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, 2, 2, 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 16:20:29,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:20:29,964 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash -395080804, now seen corresponding path program 7 times [2021-07-09 16:20:29,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:29,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221018457] [2021-07-09 16:20:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:30,177 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:30,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:30,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221018457] [2021-07-09 16:20:30,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221018457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:30,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058300057] [2021-07-09 16:20:30,267 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 16:20:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:30,799 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058300057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:30,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:30,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:20:30,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463103022] [2021-07-09 16:20:30,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:30,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:30,929 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:31,358 INFO L93 Difference]: Finished difference Result 55238 states and 146081 transitions. [2021-07-09 16:20:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:20:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-09 16:20:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:31,549 INFO L225 Difference]: With dead ends: 55238 [2021-07-09 16:20:31,549 INFO L226 Difference]: Without dead ends: 55238 [2021-07-09 16:20:31,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:20:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55238 states. [2021-07-09 16:20:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55238 to 36988. [2021-07-09 16:20:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36986 states have (on average 2.665981722814038) internal successors, (98604), 36987 states have internal predecessors, (98604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 98604 transitions. [2021-07-09 16:20:32,443 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 98604 transitions. Word has length 322 [2021-07-09 16:20:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:32,444 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 98604 transitions. [2021-07-09 16:20:32,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 98604 transitions. [2021-07-09 16:20:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:20:32,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:32,500 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, 2, 2, 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 16:20:32,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:32,701 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -752046402, now seen corresponding path program 8 times [2021-07-09 16:20:32,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:32,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048216914] [2021-07-09 16:20:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:32,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:32,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048216914] [2021-07-09 16:20:32,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048216914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:32,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101371517] [2021-07-09 16:20:32,839 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 16:20:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:32,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:33,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101371517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:33,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:33,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:20:33,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376515675] [2021-07-09 16:20:33,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:33,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:33,532 INFO L87 Difference]: Start difference. First operand 36988 states and 98604 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:33,934 INFO L93 Difference]: Finished difference Result 54758 states and 144400 transitions. [2021-07-09 16:20:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-09 16:20:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:34,048 INFO L225 Difference]: With dead ends: 54758 [2021-07-09 16:20:34,048 INFO L226 Difference]: Without dead ends: 54758 [2021-07-09 16:20:34,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54758 states. [2021-07-09 16:20:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54758 to 38248. [2021-07-09 16:20:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38248 states, 38246 states have (on average 2.6683313287664068) internal successors, (102053), 38247 states have internal predecessors, (102053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38248 states to 38248 states and 102053 transitions. [2021-07-09 16:20:34,911 INFO L78 Accepts]: Start accepts. Automaton has 38248 states and 102053 transitions. Word has length 322 [2021-07-09 16:20:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:34,911 INFO L482 AbstractCegarLoop]: Abstraction has 38248 states and 102053 transitions. [2021-07-09 16:20:34,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 38248 states and 102053 transitions. [2021-07-09 16:20:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:20:34,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:34,966 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, 2, 2, 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 16:20:35,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:35,171 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 447121760, now seen corresponding path program 9 times [2021-07-09 16:20:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:35,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693557061] [2021-07-09 16:20:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:35,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693557061] [2021-07-09 16:20:35,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693557061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246441311] [2021-07-09 16:20:35,293 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 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 16:20:35,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:20:35,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:35,683 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:36,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246441311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:36,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:36,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:20:36,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29215716] [2021-07-09 16:20:36,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:36,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:36,036 INFO L87 Difference]: Start difference. First operand 38248 states and 102053 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:36,499 INFO L93 Difference]: Finished difference Result 53093 states and 139653 transitions. [2021-07-09 16:20:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:36,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-09 16:20:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:36,615 INFO L225 Difference]: With dead ends: 53093 [2021-07-09 16:20:36,615 INFO L226 Difference]: Without dead ends: 53093 [2021-07-09 16:20:36,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53093 states. [2021-07-09 16:20:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53093 to 36308. [2021-07-09 16:20:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-09 16:20:37,418 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 322 [2021-07-09 16:20:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:37,418 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-09 16:20:37,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-09 16:20:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:20:37,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:37,665 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, 2, 2, 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 16:20:37,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 16:20:37,866 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:37,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:37,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2118752382, now seen corresponding path program 10 times [2021-07-09 16:20:37,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:37,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082741508] [2021-07-09 16:20:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:37,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082741508] [2021-07-09 16:20:37,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082741508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789205556] [2021-07-09 16:20:37,970 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 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 16:20:38,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:38,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789205556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:38,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:38,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:20:38,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688858927] [2021-07-09 16:20:38,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:38,566 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:39,062 INFO L93 Difference]: Finished difference Result 59558 states and 157552 transitions. [2021-07-09 16:20:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-09 16:20:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:39,188 INFO L225 Difference]: With dead ends: 59558 [2021-07-09 16:20:39,188 INFO L226 Difference]: Without dead ends: 59558 [2021-07-09 16:20:39,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59558 states. [2021-07-09 16:20:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59558 to 38928. [2021-07-09 16:20:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38928 states, 38926 states have (on average 2.670271797770128) internal successors, (103943), 38927 states have internal predecessors, (103943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38928 states to 38928 states and 103943 transitions. [2021-07-09 16:20:40,103 INFO L78 Accepts]: Start accepts. Automaton has 38928 states and 103943 transitions. Word has length 322 [2021-07-09 16:20:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:40,104 INFO L482 AbstractCegarLoop]: Abstraction has 38928 states and 103943 transitions. [2021-07-09 16:20:40,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38928 states and 103943 transitions. [2021-07-09 16:20:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:20:40,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:40,159 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, 2, 2, 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 16:20:40,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:40,360 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1761786784, now seen corresponding path program 11 times [2021-07-09 16:20:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:40,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399614113] [2021-07-09 16:20:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:40,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399614113] [2021-07-09 16:20:40,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399614113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165903599] [2021-07-09 16:20:40,469 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 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 16:20:40,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:20:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:41,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165903599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:41,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:41,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:20:41,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646490586] [2021-07-09 16:20:41,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:20:41,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:41,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:20:41,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:20:41,189 INFO L87 Difference]: Start difference. First operand 38928 states and 103943 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:41,685 INFO L93 Difference]: Finished difference Result 57013 states and 150357 transitions. [2021-07-09 16:20:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:20:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 322 [2021-07-09 16:20:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:41,800 INFO L225 Difference]: With dead ends: 57013 [2021-07-09 16:20:41,800 INFO L226 Difference]: Without dead ends: 57013 [2021-07-09 16:20:41,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:20:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57013 states. [2021-07-09 16:20:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57013 to 41348. [2021-07-09 16:20:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41348 states, 41346 states have (on average 2.6736806462535676) internal successors, (110546), 41347 states have internal predecessors, (110546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 110546 transitions. [2021-07-09 16:20:42,667 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 110546 transitions. Word has length 322 [2021-07-09 16:20:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:42,667 INFO L482 AbstractCegarLoop]: Abstraction has 41348 states and 110546 transitions. [2021-07-09 16:20:42,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 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 16:20:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 110546 transitions. [2021-07-09 16:20:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-07-09 16:20:42,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:42,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:43,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 16:20:43,130 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash -350311975, now seen corresponding path program 8 times [2021-07-09 16:20:43,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:43,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306090373] [2021-07-09 16:20:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:43,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:43,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306090373] [2021-07-09 16:20:43,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306090373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:43,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480851537] [2021-07-09 16:20:43,280 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 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 16:20:43,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:43,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480851537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:43,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:43,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:20:43,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364976993] [2021-07-09 16:20:43,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:20:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:20:43,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:20:43,743 INFO L87 Difference]: Start difference. First operand 41348 states and 110546 transitions. Second operand has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:44,304 INFO L93 Difference]: Finished difference Result 50527 states and 134028 transitions. [2021-07-09 16:20:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:20:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 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 326 [2021-07-09 16:20:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:44,410 INFO L225 Difference]: With dead ends: 50527 [2021-07-09 16:20:44,410 INFO L226 Difference]: Without dead ends: 50527 [2021-07-09 16:20:44,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:20:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2021-07-09 16:20:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 43150. [2021-07-09 16:20:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-09 16:20:45,388 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 326 [2021-07-09 16:20:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:45,388 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-09 16:20:45,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-09 16:20:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:45,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:45,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:45,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:20:45,657 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 670891353, now seen corresponding path program 14 times [2021-07-09 16:20:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:45,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578175248] [2021-07-09 16:20:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:20:45,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578175248] [2021-07-09 16:20:45,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578175248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797405810] [2021-07-09 16:20:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:45,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:45,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:46,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797405810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:46,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:46,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:20:46,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111464141] [2021-07-09 16:20:46,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:46,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:46,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:46,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:46,395 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:46,813 INFO L93 Difference]: Finished difference Result 53420 states and 141238 transitions. [2021-07-09 16:20:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:20:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:47,051 INFO L225 Difference]: With dead ends: 53420 [2021-07-09 16:20:47,051 INFO L226 Difference]: Without dead ends: 53420 [2021-07-09 16:20:47,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-07-09 16:20:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 43830. [2021-07-09 16:20:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43830 states, 43828 states have (on average 2.6705758875604637) internal successors, (117046), 43829 states have internal predecessors, (117046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43830 states to 43830 states and 117046 transitions. [2021-07-09 16:20:47,923 INFO L78 Accepts]: Start accepts. Automaton has 43830 states and 117046 transitions. Word has length 327 [2021-07-09 16:20:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:47,923 INFO L482 AbstractCegarLoop]: Abstraction has 43830 states and 117046 transitions. [2021-07-09 16:20:47,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43830 states and 117046 transitions. [2021-07-09 16:20:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:47,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:47,986 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:48,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:20:48,194 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash 852613623, now seen corresponding path program 15 times [2021-07-09 16:20:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331845928] [2021-07-09 16:20:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331845928] [2021-07-09 16:20:48,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331845928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709768027] [2021-07-09 16:20:48,335 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 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 16:20:48,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:20:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:48,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709768027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:49,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:49,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569503632] [2021-07-09 16:20:49,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:49,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:49,095 INFO L87 Difference]: Start difference. First operand 43830 states and 117046 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:49,671 INFO L93 Difference]: Finished difference Result 57625 states and 151795 transitions. [2021-07-09 16:20:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:20:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:49,801 INFO L225 Difference]: With dead ends: 57625 [2021-07-09 16:20:49,801 INFO L226 Difference]: Without dead ends: 57625 [2021-07-09 16:20:49,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57625 states. [2021-07-09 16:20:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57625 to 43150. [2021-07-09 16:20:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-09 16:20:50,609 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 327 [2021-07-09 16:20:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:50,610 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-09 16:20:50,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-09 16:20:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:50,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:50,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:51,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:20:51,045 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1461272085, now seen corresponding path program 16 times [2021-07-09 16:20:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717558968] [2021-07-09 16:20:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:51,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:51,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717558968] [2021-07-09 16:20:51,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717558968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:51,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487046087] [2021-07-09 16:20:51,179 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 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 16:20:51,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:51,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487046087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:51,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:51,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77262271] [2021-07-09 16:20:51,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:51,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:51,808 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:52,325 INFO L93 Difference]: Finished difference Result 58745 states and 155304 transitions. [2021-07-09 16:20:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:20:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:20:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:52,454 INFO L225 Difference]: With dead ends: 58745 [2021-07-09 16:20:52,454 INFO L226 Difference]: Without dead ends: 58745 [2021-07-09 16:20:52,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=345, Invalid=845, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:20:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58745 states. [2021-07-09 16:20:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58745 to 45090. [2021-07-09 16:20:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45090 states, 45088 states have (on average 2.672440560681334) internal successors, (120495), 45089 states have internal predecessors, (120495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45090 states to 45090 states and 120495 transitions. [2021-07-09 16:20:53,411 INFO L78 Accepts]: Start accepts. Automaton has 45090 states and 120495 transitions. Word has length 327 [2021-07-09 16:20:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:53,412 INFO L482 AbstractCegarLoop]: Abstraction has 45090 states and 120495 transitions. [2021-07-09 16:20:53,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 45090 states and 120495 transitions. [2021-07-09 16:20:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:53,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:53,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:53,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 16:20:53,677 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1370682957, now seen corresponding path program 17 times [2021-07-09 16:20:53,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:53,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392679416] [2021-07-09 16:20:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:53,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392679416] [2021-07-09 16:20:53,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392679416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358408137] [2021-07-09 16:20:53,798 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 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 16:20:53,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:20:53,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358408137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:54,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:54,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:54,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324911243] [2021-07-09 16:20:54,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:54,505 INFO L87 Difference]: Start difference. First operand 45090 states and 120495 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:55,055 INFO L93 Difference]: Finished difference Result 64210 states and 169402 transitions. [2021-07-09 16:20:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:20:55,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:20:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:55,323 INFO L225 Difference]: With dead ends: 64210 [2021-07-09 16:20:55,324 INFO L226 Difference]: Without dead ends: 64210 [2021-07-09 16:20:55,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:20:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2021-07-09 16:20:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 48290. [2021-07-09 16:20:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48290 states, 48288 states have (on average 2.6773318422796555) internal successors, (129283), 48289 states have internal predecessors, (129283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48290 states to 48290 states and 129283 transitions. [2021-07-09 16:20:56,258 INFO L78 Accepts]: Start accepts. Automaton has 48290 states and 129283 transitions. Word has length 327 [2021-07-09 16:20:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:56,259 INFO L482 AbstractCegarLoop]: Abstraction has 48290 states and 129283 transitions. [2021-07-09 16:20:56,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 48290 states and 129283 transitions. [2021-07-09 16:20:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:56,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:56,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:56,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:20:56,732 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1717509329, now seen corresponding path program 18 times [2021-07-09 16:20:56,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:56,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436496695] [2021-07-09 16:20:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:56,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436496695] [2021-07-09 16:20:56,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436496695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677934136] [2021-07-09 16:20:56,891 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 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 16:20:57,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:20:57,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:20:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:57,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677934136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:57,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:57,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:20:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478382655] [2021-07-09 16:20:57,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:20:57,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:57,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:20:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:20:57,732 INFO L87 Difference]: Start difference. First operand 48290 states and 129283 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:58,411 INFO L93 Difference]: Finished difference Result 71055 states and 187712 transitions. [2021-07-09 16:20:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:20:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:20:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:58,558 INFO L225 Difference]: With dead ends: 71055 [2021-07-09 16:20:58,558 INFO L226 Difference]: Without dead ends: 71055 [2021-07-09 16:20:58,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:20:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71055 states. [2021-07-09 16:20:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71055 to 49550. [2021-07-09 16:20:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49550 states, 49548 states have (on average 2.678856866069266) internal successors, (132732), 49549 states have internal predecessors, (132732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49550 states to 49550 states and 132732 transitions. [2021-07-09 16:20:59,745 INFO L78 Accepts]: Start accepts. Automaton has 49550 states and 132732 transitions. Word has length 327 [2021-07-09 16:20:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:59,745 INFO L482 AbstractCegarLoop]: Abstraction has 49550 states and 132732 transitions. [2021-07-09 16:20:59,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 49550 states and 132732 transitions. [2021-07-09 16:20:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:20:59,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:59,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:00,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 16:21:00,018 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1605982063, now seen corresponding path program 19 times [2021-07-09 16:21:00,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:00,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552209094] [2021-07-09 16:21:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:00,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:00,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552209094] [2021-07-09 16:21:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552209094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:00,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056722149] [2021-07-09 16:21:00,138 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 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 16:21:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:00,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:21:00,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:00,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056722149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:00,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:00,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:21:00,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116109049] [2021-07-09 16:21:00,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:21:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:00,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:21:00,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:21:00,805 INFO L87 Difference]: Start difference. First operand 49550 states and 132732 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:01,469 INFO L93 Difference]: Finished difference Result 66465 states and 176301 transitions. [2021-07-09 16:21:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:21:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 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 327 [2021-07-09 16:21:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:01,600 INFO L225 Difference]: With dead ends: 66465 [2021-07-09 16:21:01,601 INFO L226 Difference]: Without dead ends: 66465 [2021-07-09 16:21:01,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66465 states. [2021-07-09 16:21:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66465 to 48190. [2021-07-09 16:21:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48190 states, 48188 states have (on average 2.6760189258736613) internal successors, (128952), 48189 states have internal predecessors, (128952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 128952 transitions. [2021-07-09 16:21:02,832 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 128952 transitions. Word has length 327 [2021-07-09 16:21:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:02,832 INFO L482 AbstractCegarLoop]: Abstraction has 48190 states and 128952 transitions. [2021-07-09 16:21:02,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 128952 transitions. [2021-07-09 16:21:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-07-09 16:21:02,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:02,903 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, 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 16:21:03,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:03,104 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1871299756, now seen corresponding path program 12 times [2021-07-09 16:21:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:03,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872826953] [2021-07-09 16:21:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 602 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:21:03,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872826953] [2021-07-09 16:21:03,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872826953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509444188] [2021-07-09 16:21:03,213 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 16:21:03,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:21:03,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:03,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509444188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:03,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:03,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 16:21:03,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997720308] [2021-07-09 16:21:03,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:21:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:21:03,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:21:03,845 INFO L87 Difference]: Start difference. First operand 48190 states and 128952 transitions. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 16:21:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:04,429 INFO L93 Difference]: Finished difference Result 84430 states and 223303 transitions. [2021-07-09 16:21:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:21:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 351 [2021-07-09 16:21:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:04,607 INFO L225 Difference]: With dead ends: 84430 [2021-07-09 16:21:04,607 INFO L226 Difference]: Without dead ends: 84430 [2021-07-09 16:21:04,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:21:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84430 states. [2021-07-09 16:21:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84430 to 57010. [2021-07-09 16:21:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57010 states, 57008 states have (on average 2.6867632612966603) internal successors, (153167), 57009 states have internal predecessors, (153167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-07-09 16:21:06,181 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 351 [2021-07-09 16:21:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:06,182 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-07-09 16:21:06,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 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 16:21:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-07-09 16:21:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:06,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:06,277 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, 2, 2, 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 16:21:06,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:06,477 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -784131781, now seen corresponding path program 13 times [2021-07-09 16:21:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:06,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588648870] [2021-07-09 16:21:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:06,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:06,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588648870] [2021-07-09 16:21:06,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588648870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:06,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134030531] [2021-07-09 16:21:06,607 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 16:21:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:07,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134030531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:07,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:07,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011219042] [2021-07-09 16:21:07,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:07,071 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:07,327 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:21:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:07,700 INFO L93 Difference]: Finished difference Result 84875 states and 226287 transitions. [2021-07-09 16:21:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:21:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:07,866 INFO L225 Difference]: With dead ends: 84875 [2021-07-09 16:21:07,866 INFO L226 Difference]: Without dead ends: 84875 [2021-07-09 16:21:07,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:21:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84875 states. [2021-07-09 16:21:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84875 to 58370. [2021-07-09 16:21:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-09 16:21:09,494 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-09 16:21:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:09,495 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-09 16:21:09,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-09 16:21:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:09,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:09,578 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, 2, 2, 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 16:21:09,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:09,779 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1141097379, now seen corresponding path program 14 times [2021-07-09 16:21:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697719433] [2021-07-09 16:21:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:09,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:09,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697719433] [2021-07-09 16:21:09,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697719433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:09,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155322761] [2021-07-09 16:21:09,908 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 16:21:10,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:10,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:10,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155322761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:10,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:10,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:10,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384826696] [2021-07-09 16:21:10,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:10,411 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:11,172 INFO L93 Difference]: Finished difference Result 84600 states and 225611 transitions. [2021-07-09 16:21:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:11,387 INFO L225 Difference]: With dead ends: 84600 [2021-07-09 16:21:11,387 INFO L226 Difference]: Without dead ends: 84600 [2021-07-09 16:21:11,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:21:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84600 states. [2021-07-09 16:21:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84600 to 58370. [2021-07-09 16:21:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-09 16:21:12,795 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-09 16:21:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:12,795 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-09 16:21:12,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-09 16:21:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:12,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:12,895 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, 2, 2, 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 16:21:13,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 16:21:13,095 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash 58070783, now seen corresponding path program 15 times [2021-07-09 16:21:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:13,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308149269] [2021-07-09 16:21:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:13,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308149269] [2021-07-09 16:21:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308149269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:13,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073723564] [2021-07-09 16:21:13,226 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 16:21:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:21:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073723564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:14,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:14,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514102825] [2021-07-09 16:21:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:14,074 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:14,730 INFO L93 Difference]: Finished difference Result 86910 states and 231422 transitions. [2021-07-09 16:21:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:14,907 INFO L225 Difference]: With dead ends: 86910 [2021-07-09 16:21:14,907 INFO L226 Difference]: Without dead ends: 86910 [2021-07-09 16:21:14,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86910 states. [2021-07-09 16:21:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86910 to 59630. [2021-07-09 16:21:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59630 states, 59628 states have (on average 2.6899443214597167) internal successors, (160396), 59629 states have internal predecessors, (160396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59630 states to 59630 states and 160396 transitions. [2021-07-09 16:21:16,243 INFO L78 Accepts]: Start accepts. Automaton has 59630 states and 160396 transitions. Word has length 356 [2021-07-09 16:21:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:16,243 INFO L482 AbstractCegarLoop]: Abstraction has 59630 states and 160396 transitions. [2021-07-09 16:21:16,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 59630 states and 160396 transitions. [2021-07-09 16:21:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:16,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:16,344 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, 2, 2, 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 16:21:16,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:16,544 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash -719140575, now seen corresponding path program 16 times [2021-07-09 16:21:16,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:16,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193850492] [2021-07-09 16:21:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:16,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:16,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193850492] [2021-07-09 16:21:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193850492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:16,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573125342] [2021-07-09 16:21:16,674 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 16:21:16,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:16,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:16,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573125342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:17,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:21:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564704145] [2021-07-09 16:21:17,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:17,535 INFO L87 Difference]: Start difference. First operand 59630 states and 160396 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:18,157 INFO L93 Difference]: Finished difference Result 78235 states and 207498 transitions. [2021-07-09 16:21:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:18,315 INFO L225 Difference]: With dead ends: 78235 [2021-07-09 16:21:18,315 INFO L226 Difference]: Without dead ends: 78235 [2021-07-09 16:21:18,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78235 states. [2021-07-09 16:21:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78235 to 57690. [2021-07-09 16:21:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57688 states have (on average 2.68785535986687) internal successors, (155057), 57689 states have internal predecessors, (155057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 155057 transitions. [2021-07-09 16:21:19,626 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 155057 transitions. Word has length 356 [2021-07-09 16:21:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:19,626 INFO L482 AbstractCegarLoop]: Abstraction has 57690 states and 155057 transitions. [2021-07-09 16:21:19,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 155057 transitions. [2021-07-09 16:21:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:19,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:19,715 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, 2, 2, 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 16:21:19,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:19,916 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1710189981, now seen corresponding path program 17 times [2021-07-09 16:21:19,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:19,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227439422] [2021-07-09 16:21:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:20,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:20,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227439422] [2021-07-09 16:21:20,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227439422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637235628] [2021-07-09 16:21:20,033 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 16:21:20,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:21:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:20,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637235628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:20,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:20,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613586169] [2021-07-09 16:21:20,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:20,852 INFO L87 Difference]: Start difference. First operand 57690 states and 155057 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:21,441 INFO L93 Difference]: Finished difference Result 94765 states and 252835 transitions. [2021-07-09 16:21:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:21,814 INFO L225 Difference]: With dead ends: 94765 [2021-07-09 16:21:21,814 INFO L226 Difference]: Without dead ends: 94765 [2021-07-09 16:21:21,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:21:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94765 states. [2021-07-09 16:21:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94765 to 60990. [2021-07-09 16:21:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60990 states, 60988 states have (on average 2.691939397914344) internal successors, (164176), 60989 states have internal predecessors, (164176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60990 states to 60990 states and 164176 transitions. [2021-07-09 16:21:23,271 INFO L78 Accepts]: Start accepts. Automaton has 60990 states and 164176 transitions. Word has length 356 [2021-07-09 16:21:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:23,271 INFO L482 AbstractCegarLoop]: Abstraction has 60990 states and 164176 transitions. [2021-07-09 16:21:23,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 60990 states and 164176 transitions. [2021-07-09 16:21:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:23,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:23,368 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, 2, 2, 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 16:21:23,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 16:21:23,569 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1353224383, now seen corresponding path program 18 times [2021-07-09 16:21:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:23,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697768246] [2021-07-09 16:21:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:23,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:23,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697768246] [2021-07-09 16:21:23,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697768246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:23,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634335593] [2021-07-09 16:21:23,681 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 16:21:23,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:21:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634335593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:24,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:24,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:24,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914937198] [2021-07-09 16:21:24,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:24,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:24,542 INFO L87 Difference]: Start difference. First operand 60990 states and 164176 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:25,266 INFO L93 Difference]: Finished difference Result 94500 states and 252439 transitions. [2021-07-09 16:21:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:25,448 INFO L225 Difference]: With dead ends: 94500 [2021-07-09 16:21:25,449 INFO L226 Difference]: Without dead ends: 94500 [2021-07-09 16:21:25,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=280, Invalid=776, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94500 states. [2021-07-09 16:21:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94500 to 61570. [2021-07-09 16:21:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61570 states, 61568 states have (on average 2.691901637214137) internal successors, (165735), 61569 states have internal predecessors, (165735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61570 states to 61570 states and 165735 transitions. [2021-07-09 16:21:26,865 INFO L78 Accepts]: Start accepts. Automaton has 61570 states and 165735 transitions. Word has length 356 [2021-07-09 16:21:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 61570 states and 165735 transitions. [2021-07-09 16:21:26,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 61570 states and 165735 transitions. [2021-07-09 16:21:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:26,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:26,968 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, 2, 2, 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 16:21:27,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 16:21:27,169 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1742574751, now seen corresponding path program 19 times [2021-07-09 16:21:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662495244] [2021-07-09 16:21:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:27,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:27,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662495244] [2021-07-09 16:21:27,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662495244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:27,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983543130] [2021-07-09 16:21:27,286 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 16:21:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:27,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983543130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:27,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:27,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:27,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925385287] [2021-07-09 16:21:27,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:27,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:27,992 INFO L87 Difference]: Start difference. First operand 61570 states and 165735 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:28,642 INFO L93 Difference]: Finished difference Result 85000 states and 225917 transitions. [2021-07-09 16:21:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:21:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:28,809 INFO L225 Difference]: With dead ends: 85000 [2021-07-09 16:21:28,809 INFO L226 Difference]: Without dead ends: 85000 [2021-07-09 16:21:28,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:21:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85000 states. [2021-07-09 16:21:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85000 to 60110. [2021-07-09 16:21:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60110 states, 60108 states have (on average 2.6894922472882143) internal successors, (161660), 60109 states have internal predecessors, (161660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60110 states to 60110 states and 161660 transitions. [2021-07-09 16:21:30,140 INFO L78 Accepts]: Start accepts. Automaton has 60110 states and 161660 transitions. Word has length 356 [2021-07-09 16:21:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:30,141 INFO L482 AbstractCegarLoop]: Abstraction has 60110 states and 161660 transitions. [2021-07-09 16:21:30,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 60110 states and 161660 transitions. [2021-07-09 16:21:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:30,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:30,233 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, 2, 2, 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 16:21:30,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 16:21:30,435 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash -70944129, now seen corresponding path program 20 times [2021-07-09 16:21:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:30,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869766209] [2021-07-09 16:21:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:30,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869766209] [2021-07-09 16:21:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869766209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556520345] [2021-07-09 16:21:30,557 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 16:21:30,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:31,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556520345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:31,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782790587] [2021-07-09 16:21:31,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:31,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:31,243 INFO L87 Difference]: Start difference. First operand 60110 states and 161660 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:31,993 INFO L93 Difference]: Finished difference Result 102765 states and 275164 transitions. [2021-07-09 16:21:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:31,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:32,213 INFO L225 Difference]: With dead ends: 102765 [2021-07-09 16:21:32,213 INFO L226 Difference]: Without dead ends: 102765 [2021-07-09 16:21:32,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:21:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102765 states. [2021-07-09 16:21:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102765 to 62050. [2021-07-09 16:21:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62050 states, 62048 states have (on average 2.6914485559566788) internal successors, (166999), 62049 states have internal predecessors, (166999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62050 states to 62050 states and 166999 transitions. [2021-07-09 16:21:33,763 INFO L78 Accepts]: Start accepts. Automaton has 62050 states and 166999 transitions. Word has length 356 [2021-07-09 16:21:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:33,763 INFO L482 AbstractCegarLoop]: Abstraction has 62050 states and 166999 transitions. [2021-07-09 16:21:33,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 62050 states and 166999 transitions. [2021-07-09 16:21:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:21:33,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:33,866 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, 2, 2, 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 16:21:34,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:34,066 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash -427909727, now seen corresponding path program 21 times [2021-07-09 16:21:34,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:34,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887242323] [2021-07-09 16:21:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:34,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:34,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887242323] [2021-07-09 16:21:34,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887242323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:34,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215862127] [2021-07-09 16:21:34,497 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 16:21:34,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:21:34,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:34,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215862127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:35,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:35,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:21:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792237599] [2021-07-09 16:21:35,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:21:35,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:21:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:21:35,138 INFO L87 Difference]: Start difference. First operand 62050 states and 166999 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:35,776 INFO L93 Difference]: Finished difference Result 84020 states and 223960 transitions. [2021-07-09 16:21:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:21:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 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 356 [2021-07-09 16:21:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:35,933 INFO L225 Difference]: With dead ends: 84020 [2021-07-09 16:21:35,933 INFO L226 Difference]: Without dead ends: 84020 [2021-07-09 16:21:35,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:21:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84020 states. [2021-07-09 16:21:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84020 to 64470. [2021-07-09 16:21:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64470 states, 64468 states have (on average 2.692839858534467) internal successors, (173602), 64469 states have internal predecessors, (173602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 173602 transitions. [2021-07-09 16:21:37,324 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 173602 transitions. Word has length 356 [2021-07-09 16:21:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:37,325 INFO L482 AbstractCegarLoop]: Abstraction has 64470 states and 173602 transitions. [2021-07-09 16:21:37,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 173602 transitions. [2021-07-09 16:21:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-07-09 16:21:37,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:37,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:37,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:37,624 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:37,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1006996314, now seen corresponding path program 9 times [2021-07-09 16:21:37,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:37,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323225329] [2021-07-09 16:21:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:21:38,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323225329] [2021-07-09 16:21:38,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323225329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929086533] [2021-07-09 16:21:38,042 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 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 16:21:38,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:21:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:38,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:21:38,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929086533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:38,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:38,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:21:38,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903917144] [2021-07-09 16:21:38,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:21:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:21:38,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:21:38,913 INFO L87 Difference]: Start difference. First operand 64470 states and 173602 transitions. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:39,647 INFO L93 Difference]: Finished difference Result 74359 states and 198824 transitions. [2021-07-09 16:21:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:21:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 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 360 [2021-07-09 16:21:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:39,805 INFO L225 Difference]: With dead ends: 74359 [2021-07-09 16:21:39,806 INFO L226 Difference]: Without dead ends: 74359 [2021-07-09 16:21:39,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=601, Invalid=1205, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:21:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74359 states. [2021-07-09 16:21:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74359 to 66272. [2021-07-09 16:21:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66272 states, 66270 states have (on average 2.6891806247170664) internal successors, (178212), 66271 states have internal predecessors, (178212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66272 states to 66272 states and 178212 transitions. [2021-07-09 16:21:41,233 INFO L78 Accepts]: Start accepts. Automaton has 66272 states and 178212 transitions. Word has length 360 [2021-07-09 16:21:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:41,233 INFO L482 AbstractCegarLoop]: Abstraction has 66272 states and 178212 transitions. [2021-07-09 16:21:41,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 66272 states and 178212 transitions. [2021-07-09 16:21:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:41,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:41,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:41,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:41,554 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1945042650, now seen corresponding path program 20 times [2021-07-09 16:21:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:41,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388048043] [2021-07-09 16:21:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:21:41,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:41,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388048043] [2021-07-09 16:21:41,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388048043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:41,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689019812] [2021-07-09 16:21:41,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:21:42,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:42,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:42,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689019812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:42,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:42,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:21:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865116292] [2021-07-09 16:21:42,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:42,480 INFO L87 Difference]: Start difference. First operand 66272 states and 178212 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:43,146 INFO L93 Difference]: Finished difference Result 78842 states and 210214 transitions. [2021-07-09 16:21:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:21:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:43,301 INFO L225 Difference]: With dead ends: 78842 [2021-07-09 16:21:43,301 INFO L226 Difference]: Without dead ends: 78842 [2021-07-09 16:21:43,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78842 states. [2021-07-09 16:21:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78842 to 67632. [2021-07-09 16:21:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67632 states, 67630 states have (on average 2.69099512050865) internal successors, (181992), 67631 states have internal predecessors, (181992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67632 states to 67632 states and 181992 transitions. [2021-07-09 16:21:44,675 INFO L78 Accepts]: Start accepts. Automaton has 67632 states and 181992 transitions. Word has length 361 [2021-07-09 16:21:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:44,675 INFO L482 AbstractCegarLoop]: Abstraction has 67632 states and 181992 transitions. [2021-07-09 16:21:44,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67632 states and 181992 transitions. [2021-07-09 16:21:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:44,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:44,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:44,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:44,980 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2007813128, now seen corresponding path program 21 times [2021-07-09 16:21:44,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:44,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678619232] [2021-07-09 16:21:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:45,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678619232] [2021-07-09 16:21:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678619232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38391116] [2021-07-09 16:21:45,373 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 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 16:21:45,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:21:45,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:46,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38391116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:46,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:46,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:46,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824810833] [2021-07-09 16:21:46,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:46,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:46,097 INFO L87 Difference]: Start difference. First operand 67632 states and 181992 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:46,800 INFO L93 Difference]: Finished difference Result 84237 states and 223851 transitions. [2021-07-09 16:21:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:21:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:46,988 INFO L225 Difference]: With dead ends: 84237 [2021-07-09 16:21:46,988 INFO L226 Difference]: Without dead ends: 84237 [2021-07-09 16:21:46,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84237 states. [2021-07-09 16:21:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84237 to 66952. [2021-07-09 16:21:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66952 states, 66950 states have (on average 2.690097087378641) internal successors, (180102), 66951 states have internal predecessors, (180102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66952 states to 66952 states and 180102 transitions. [2021-07-09 16:21:48,364 INFO L78 Accepts]: Start accepts. Automaton has 66952 states and 180102 transitions. Word has length 361 [2021-07-09 16:21:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:48,365 INFO L482 AbstractCegarLoop]: Abstraction has 66952 states and 180102 transitions. [2021-07-09 16:21:48,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 66952 states and 180102 transitions. [2021-07-09 16:21:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:48,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:48,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:48,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 16:21:48,688 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1826090858, now seen corresponding path program 22 times [2021-07-09 16:21:48,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:48,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172237671] [2021-07-09 16:21:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:49,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:49,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172237671] [2021-07-09 16:21:49,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172237671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:49,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056149210] [2021-07-09 16:21:49,083 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 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 16:21:49,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:49,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056149210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:49,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:49,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858404988] [2021-07-09 16:21:49,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:49,927 INFO L87 Difference]: Start difference. First operand 66952 states and 180102 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:50,650 INFO L93 Difference]: Finished difference Result 87037 states and 232000 transitions. [2021-07-09 16:21:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:21:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:21:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:50,829 INFO L225 Difference]: With dead ends: 87037 [2021-07-09 16:21:50,829 INFO L226 Difference]: Without dead ends: 87037 [2021-07-09 16:21:50,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:21:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states. [2021-07-09 16:21:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87037 to 68212. [2021-07-09 16:21:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68212 states, 68210 states have (on average 2.6909690661193375) internal successors, (183551), 68211 states have internal predecessors, (183551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68212 states to 68212 states and 183551 transitions. [2021-07-09 16:21:52,469 INFO L78 Accepts]: Start accepts. Automaton has 68212 states and 183551 transitions. Word has length 361 [2021-07-09 16:21:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:52,470 INFO L482 AbstractCegarLoop]: Abstraction has 68212 states and 183551 transitions. [2021-07-09 16:21:52,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 68212 states and 183551 transitions. [2021-07-09 16:21:52,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:52,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:52,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:52,809 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1217432396, now seen corresponding path program 23 times [2021-07-09 16:21:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:52,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771060184] [2021-07-09 16:21:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:52,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771060184] [2021-07-09 16:21:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771060184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:52,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700571294] [2021-07-09 16:21:52,954 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 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 16:21:53,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:21:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:53,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700571294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:53,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:53,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:53,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119334263] [2021-07-09 16:21:53,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:53,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:53,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:53,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:53,749 INFO L87 Difference]: Start difference. First operand 68212 states and 183551 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:54,495 INFO L93 Difference]: Finished difference Result 91482 states and 243654 transitions. [2021-07-09 16:21:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:21:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:21:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:54,675 INFO L225 Difference]: With dead ends: 91482 [2021-07-09 16:21:54,675 INFO L226 Difference]: Without dead ends: 91482 [2021-07-09 16:21:54,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:21:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-07-09 16:21:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 70152. [2021-07-09 16:21:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70152 states, 70150 states have (on average 2.692658588738418) internal successors, (188890), 70151 states have internal predecessors, (188890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70152 states to 70152 states and 188890 transitions. [2021-07-09 16:21:56,159 INFO L78 Accepts]: Start accepts. Automaton has 70152 states and 188890 transitions. Word has length 361 [2021-07-09 16:21:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:56,160 INFO L482 AbstractCegarLoop]: Abstraction has 70152 states and 188890 transitions. [2021-07-09 16:21:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 70152 states and 188890 transitions. [2021-07-09 16:21:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:56,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:56,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:56,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 16:21:56,480 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 245579858, now seen corresponding path program 24 times [2021-07-09 16:21:56,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:56,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635089455] [2021-07-09 16:21:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:56,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635089455] [2021-07-09 16:21:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635089455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123812879] [2021-07-09 16:21:56,911 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 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 16:21:57,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:21:57,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:57,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123812879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:57,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:57,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:57,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887861724] [2021-07-09 16:21:57,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:57,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:57,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:57,628 INFO L87 Difference]: Start difference. First operand 70152 states and 188890 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:58,357 INFO L93 Difference]: Finished difference Result 94847 states and 252707 transitions. [2021-07-09 16:21:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:21:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:21:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:58,545 INFO L225 Difference]: With dead ends: 94847 [2021-07-09 16:21:58,545 INFO L226 Difference]: Without dead ends: 94847 [2021-07-09 16:21:58,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:21:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94847 states. [2021-07-09 16:21:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94847 to 73352. [2021-07-09 16:21:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-09 16:22:00,131 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-09 16:22:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:00,132 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-09 16:22:00,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-09 16:22:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:22:00,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:00,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:22:00,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 16:22:00,705 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:00,706 INFO L82 PathProgramCache]: Analyzing trace with hash -961195152, now seen corresponding path program 25 times [2021-07-09 16:22:00,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:00,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578292870] [2021-07-09 16:22:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:00,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:00,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578292870] [2021-07-09 16:22:00,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578292870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:00,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664304799] [2021-07-09 16:22:00,845 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 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 16:22:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:22:00,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664304799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:01,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:01,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:22:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171508887] [2021-07-09 16:22:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:22:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:22:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:22:01,361 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:02,160 INFO L93 Difference]: Finished difference Result 91972 states and 244941 transitions. [2021-07-09 16:22:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:22:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:22:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:02,352 INFO L225 Difference]: With dead ends: 91972 [2021-07-09 16:22:02,352 INFO L226 Difference]: Without dead ends: 91972 [2021-07-09 16:22:02,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:22:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91972 states. [2021-07-09 16:22:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91972 to 73352. [2021-07-09 16:22:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-09 16:22:04,219 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-09 16:22:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:04,219 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-09 16:22:04,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-09 16:22:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:22:04,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:04,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:22:04,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:04,536 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1072722418, now seen corresponding path program 26 times [2021-07-09 16:22:04,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:04,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994093747] [2021-07-09 16:22:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:04,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994093747] [2021-07-09 16:22:04,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994093747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839733729] [2021-07-09 16:22:04,673 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 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 16:22:04,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:04,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:22:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:05,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839733729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:05,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:05,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:22:05,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040161591] [2021-07-09 16:22:05,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:22:05,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:22:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:22:05,431 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:06,045 INFO L93 Difference]: Finished difference Result 91272 states and 243453 transitions. [2021-07-09 16:22:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:22:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 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 361 [2021-07-09 16:22:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:06,376 INFO L225 Difference]: With dead ends: 91272 [2021-07-09 16:22:06,376 INFO L226 Difference]: Without dead ends: 91272 [2021-07-09 16:22:06,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:22:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91272 states. [2021-07-09 16:22:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91272 to 72672. [2021-07-09 16:22:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72672 states, 72670 states have (on average 2.6942066877666164) internal successors, (195788), 72671 states have internal predecessors, (195788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72672 states to 72672 states and 195788 transitions. [2021-07-09 16:22:07,897 INFO L78 Accepts]: Start accepts. Automaton has 72672 states and 195788 transitions. Word has length 361 [2021-07-09 16:22:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:07,898 INFO L482 AbstractCegarLoop]: Abstraction has 72672 states and 195788 transitions. [2021-07-09 16:22:07,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 72672 states and 195788 transitions. [2021-07-09 16:22:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:22:08,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:08,012 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, 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 16:22:08,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 16:22:08,214 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash -204708331, now seen corresponding path program 22 times [2021-07-09 16:22:08,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:08,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157959759] [2021-07-09 16:22:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:22:08,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:08,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157959759] [2021-07-09 16:22:08,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157959759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:08,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307098057] [2021-07-09 16:22:08,339 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 16:22:09,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:22:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307098057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:09,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:09,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:09,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974655016] [2021-07-09 16:22:09,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:09,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:09,378 INFO L87 Difference]: Start difference. First operand 72672 states and 195788 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:10,134 INFO L93 Difference]: Finished difference Result 104087 states and 277712 transitions. [2021-07-09 16:22:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 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 385 [2021-07-09 16:22:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:10,391 INFO L225 Difference]: With dead ends: 104087 [2021-07-09 16:22:10,391 INFO L226 Difference]: Without dead ends: 104087 [2021-07-09 16:22:10,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104087 states. [2021-07-09 16:22:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104087 to 74612. [2021-07-09 16:22:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74612 states, 74610 states have (on average 2.6957110306929364) internal successors, (201127), 74611 states have internal predecessors, (201127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74612 states to 74612 states and 201127 transitions. [2021-07-09 16:22:12,330 INFO L78 Accepts]: Start accepts. Automaton has 74612 states and 201127 transitions. Word has length 385 [2021-07-09 16:22:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:12,331 INFO L482 AbstractCegarLoop]: Abstraction has 74612 states and 201127 transitions. [2021-07-09 16:22:12,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74612 states and 201127 transitions. [2021-07-09 16:22:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:22:12,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:12,466 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, 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 16:22:12,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:12,666 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 262396659, now seen corresponding path program 23 times [2021-07-09 16:22:12,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:12,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069971209] [2021-07-09 16:22:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:22:12,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:12,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069971209] [2021-07-09 16:22:12,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069971209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:12,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664046246] [2021-07-09 16:22:12,791 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 16:22:13,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:22:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:13,486 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:22:13,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664046246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:13,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:13,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:13,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147594160] [2021-07-09 16:22:13,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:13,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:13,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:13,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:13,585 INFO L87 Difference]: Start difference. First operand 74612 states and 201127 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:14,181 INFO L93 Difference]: Finished difference Result 111247 states and 297294 transitions. [2021-07-09 16:22:14,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:14,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 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 385 [2021-07-09 16:22:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:14,607 INFO L225 Difference]: With dead ends: 111247 [2021-07-09 16:22:14,607 INFO L226 Difference]: Without dead ends: 111247 [2021-07-09 16:22:14,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111247 states. [2021-07-09 16:22:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111247 to 75972. [2021-07-09 16:22:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75972 states, 75970 states have (on average 2.697209424772937) internal successors, (204907), 75971 states have internal predecessors, (204907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75972 states to 75972 states and 204907 transitions. [2021-07-09 16:22:16,261 INFO L78 Accepts]: Start accepts. Automaton has 75972 states and 204907 transitions. Word has length 385 [2021-07-09 16:22:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:16,261 INFO L482 AbstractCegarLoop]: Abstraction has 75972 states and 204907 transitions. [2021-07-09 16:22:16,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 75972 states and 204907 transitions. [2021-07-09 16:22:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:22:16,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:16,697 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, 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 16:22:16,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 16:22:16,898 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -94568939, now seen corresponding path program 24 times [2021-07-09 16:22:16,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:16,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317809028] [2021-07-09 16:22:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:22:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317809028] [2021-07-09 16:22:17,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317809028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353045632] [2021-07-09 16:22:17,026 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 16:22:17,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:22:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:22:17,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353045632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:17,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:17,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:22:17,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778707763] [2021-07-09 16:22:17,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:17,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:17,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:17,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:17,806 INFO L87 Difference]: Start difference. First operand 75972 states and 204907 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:18,167 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:22:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:18,508 INFO L93 Difference]: Finished difference Result 96182 states and 255392 transitions. [2021-07-09 16:22:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 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 385 [2021-07-09 16:22:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:18,735 INFO L225 Difference]: With dead ends: 96182 [2021-07-09 16:22:18,735 INFO L226 Difference]: Without dead ends: 96182 [2021-07-09 16:22:18,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96182 states. [2021-07-09 16:22:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96182 to 70352. [2021-07-09 16:22:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70352 states, 70350 states have (on average 2.693901918976546) internal successors, (189516), 70351 states have internal predecessors, (189516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 189516 transitions. [2021-07-09 16:22:20,573 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 189516 transitions. Word has length 385 [2021-07-09 16:22:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:20,574 INFO L482 AbstractCegarLoop]: Abstraction has 70352 states and 189516 transitions. [2021-07-09 16:22:20,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 189516 transitions. [2021-07-09 16:22:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:22:20,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:20,702 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, 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 16:22:20,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:20,903 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 420103411, now seen corresponding path program 25 times [2021-07-09 16:22:20,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:20,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563954204] [2021-07-09 16:22:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:22:21,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563954204] [2021-07-09 16:22:21,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563954204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:21,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447578641] [2021-07-09 16:22:21,014 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 16:22:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:22:21,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447578641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:21,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:21,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:22:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735917504] [2021-07-09 16:22:21,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:22:21,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:21,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:22:21,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:22:21,735 INFO L87 Difference]: Start difference. First operand 70352 states and 189516 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:22,346 INFO L93 Difference]: Finished difference Result 110607 states and 294134 transitions. [2021-07-09 16:22:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:22:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 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 385 [2021-07-09 16:22:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:22,788 INFO L225 Difference]: With dead ends: 110607 [2021-07-09 16:22:22,788 INFO L226 Difference]: Without dead ends: 110607 [2021-07-09 16:22:22,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:22:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110607 states. [2021-07-09 16:22:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110607 to 79172. [2021-07-09 16:22:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79172 states, 79170 states have (on average 2.6996463306808134) internal successors, (213731), 79171 states have internal predecessors, (213731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79172 states to 79172 states and 213731 transitions. [2021-07-09 16:22:24,530 INFO L78 Accepts]: Start accepts. Automaton has 79172 states and 213731 transitions. Word has length 385 [2021-07-09 16:22:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:24,531 INFO L482 AbstractCegarLoop]: Abstraction has 79172 states and 213731 transitions. [2021-07-09 16:22:24,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 79172 states and 213731 transitions. [2021-07-09 16:22:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:24,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:24,957 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, 2, 2, 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 16:22:25,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 16:22:25,158 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash 143556378, now seen corresponding path program 26 times [2021-07-09 16:22:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:25,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465215896] [2021-07-09 16:22:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:22:25,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:25,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465215896] [2021-07-09 16:22:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465215896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:25,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898427422] [2021-07-09 16:22:25,320 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 16:22:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:25,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898427422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:25,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:25,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:22:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258106213] [2021-07-09 16:22:25,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:25,827 INFO L87 Difference]: Start difference. First operand 79172 states and 213731 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:26,696 INFO L93 Difference]: Finished difference Result 110172 states and 294666 transitions. [2021-07-09 16:22:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:22:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:27,100 INFO L225 Difference]: With dead ends: 110172 [2021-07-09 16:22:27,100 INFO L226 Difference]: Without dead ends: 110172 [2021-07-09 16:22:27,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:22:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110172 states. [2021-07-09 16:22:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110172 to 79852. [2021-07-09 16:22:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:22:28,847 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:22:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:28,848 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:22:28,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:22:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:29,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:29,299 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, 2, 2, 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 16:22:29,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:29,500 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -213409220, now seen corresponding path program 27 times [2021-07-09 16:22:29,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:29,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104195785] [2021-07-09 16:22:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:22:29,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104195785] [2021-07-09 16:22:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104195785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334416665] [2021-07-09 16:22:29,659 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 16:22:30,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:22:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334416665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:30,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:30,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:22:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752884146] [2021-07-09 16:22:30,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:30,463 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:31,330 INFO L93 Difference]: Finished difference Result 114067 states and 305249 transitions. [2021-07-09 16:22:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:22:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:31,599 INFO L225 Difference]: With dead ends: 114067 [2021-07-09 16:22:31,599 INFO L226 Difference]: Without dead ends: 114067 [2021-07-09 16:22:31,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:22:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114067 states. [2021-07-09 16:22:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114067 to 79852. [2021-07-09 16:22:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:22:33,598 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:22:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:22:33,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:22:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:33,727 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, 2, 2, 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 16:22:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 16:22:33,928 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 985758942, now seen corresponding path program 28 times [2021-07-09 16:22:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:33,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664873182] [2021-07-09 16:22:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:22:34,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664873182] [2021-07-09 16:22:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664873182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873108242] [2021-07-09 16:22:34,402 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 16:22:34,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:34,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873108242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:35,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:35,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:22:35,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96868876] [2021-07-09 16:22:35,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:35,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:35,186 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:35,981 INFO L93 Difference]: Finished difference Result 115432 states and 309095 transitions. [2021-07-09 16:22:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:22:35,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:36,264 INFO L225 Difference]: With dead ends: 115432 [2021-07-09 16:22:36,265 INFO L226 Difference]: Without dead ends: 115432 [2021-07-09 16:22:36,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:22:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115432 states. [2021-07-09 16:22:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115432 to 78592. [2021-07-09 16:22:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78592 states, 78590 states have (on average 2.6997327904313524) internal successors, (212172), 78591 states have internal predecessors, (212172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78592 states to 78592 states and 212172 transitions. [2021-07-09 16:22:38,339 INFO L78 Accepts]: Start accepts. Automaton has 78592 states and 212172 transitions. Word has length 390 [2021-07-09 16:22:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:38,339 INFO L482 AbstractCegarLoop]: Abstraction has 78592 states and 212172 transitions. [2021-07-09 16:22:38,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 78592 states and 212172 transitions. [2021-07-09 16:22:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:38,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:38,460 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, 2, 2, 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 16:22:38,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:38,665 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:38,665 INFO L82 PathProgramCache]: Analyzing trace with hash 208547584, now seen corresponding path program 29 times [2021-07-09 16:22:38,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:38,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046701626] [2021-07-09 16:22:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:22:39,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:39,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046701626] [2021-07-09 16:22:39,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046701626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:39,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154308256] [2021-07-09 16:22:39,158 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 16:22:39,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:22:39,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154308256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:39,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:22:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918975493] [2021-07-09 16:22:39,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:39,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:39,776 INFO L87 Difference]: Start difference. First operand 78592 states and 212172 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:40,592 INFO L93 Difference]: Finished difference Result 113602 states and 303457 transitions. [2021-07-09 16:22:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:40,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:40,854 INFO L225 Difference]: With dead ends: 113602 [2021-07-09 16:22:40,854 INFO L226 Difference]: Without dead ends: 113602 [2021-07-09 16:22:40,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113602 states. [2021-07-09 16:22:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113602 to 79852. [2021-07-09 16:22:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:22:42,948 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:22:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:42,948 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:22:42,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:22:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:43,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:43,076 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, 2, 2, 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 16:22:43,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 16:22:43,277 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash -784869214, now seen corresponding path program 30 times [2021-07-09 16:22:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:43,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386660703] [2021-07-09 16:22:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:22:43,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386660703] [2021-07-09 16:22:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386660703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593381347] [2021-07-09 16:22:43,427 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 16:22:44,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:22:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:44,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593381347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:44,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:44,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:22:44,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454841259] [2021-07-09 16:22:44,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:44,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:44,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:44,587 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:45,358 INFO L93 Difference]: Finished difference Result 102417 states and 272783 transitions. [2021-07-09 16:22:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:45,596 INFO L225 Difference]: With dead ends: 102417 [2021-07-09 16:22:45,596 INFO L226 Difference]: Without dead ends: 102417 [2021-07-09 16:22:45,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102417 states. [2021-07-09 16:22:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102417 to 77232. [2021-07-09 16:22:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77232 states, 77230 states have (on average 2.698329664638094) internal successors, (208392), 77231 states have internal predecessors, (208392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77232 states to 77232 states and 208392 transitions. [2021-07-09 16:22:47,563 INFO L78 Accepts]: Start accepts. Automaton has 77232 states and 208392 transitions. Word has length 390 [2021-07-09 16:22:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:47,564 INFO L482 AbstractCegarLoop]: Abstraction has 77232 states and 208392 transitions. [2021-07-09 16:22:47,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 77232 states and 208392 transitions. [2021-07-09 16:22:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:47,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:47,691 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, 2, 2, 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 16:22:47,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 16:22:47,893 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash -266388740, now seen corresponding path program 31 times [2021-07-09 16:22:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:47,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162666435] [2021-07-09 16:22:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:48,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:48,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162666435] [2021-07-09 16:22:48,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162666435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:48,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407970611] [2021-07-09 16:22:48,027 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 16:22:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407970611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:48,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:48,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:48,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286045600] [2021-07-09 16:22:48,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:48,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:48,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:48,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:48,795 INFO L87 Difference]: Start difference. First operand 77232 states and 208392 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:49,631 INFO L93 Difference]: Finished difference Result 120732 states and 322804 transitions. [2021-07-09 16:22:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:22:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:49,914 INFO L225 Difference]: With dead ends: 120732 [2021-07-09 16:22:49,914 INFO L226 Difference]: Without dead ends: 120732 [2021-07-09 16:22:49,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:22:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120732 states. [2021-07-09 16:22:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120732 to 80532. [2021-07-09 16:22:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80532 states, 80530 states have (on average 2.7009934186017635) internal successors, (217511), 80531 states have internal predecessors, (217511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80532 states to 80532 states and 217511 transitions. [2021-07-09 16:22:52,010 INFO L78 Accepts]: Start accepts. Automaton has 80532 states and 217511 transitions. Word has length 390 [2021-07-09 16:22:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:52,010 INFO L482 AbstractCegarLoop]: Abstraction has 80532 states and 217511 transitions. [2021-07-09 16:22:52,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 80532 states and 217511 transitions. [2021-07-09 16:22:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:52,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:52,158 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, 2, 2, 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 16:22:52,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 16:22:52,358 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -623354338, now seen corresponding path program 32 times [2021-07-09 16:22:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:52,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628640946] [2021-07-09 16:22:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:52,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:52,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628640946] [2021-07-09 16:22:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628640946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:52,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252661824] [2021-07-09 16:22:52,499 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 16:22:52,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:52,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:53,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252661824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:53,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:53,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:53,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547873552] [2021-07-09 16:22:53,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:53,290 INFO L87 Difference]: Start difference. First operand 80532 states and 217511 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:54,147 INFO L93 Difference]: Finished difference Result 125277 states and 335467 transitions. [2021-07-09 16:22:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:22:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:54,462 INFO L225 Difference]: With dead ends: 125277 [2021-07-09 16:22:54,462 INFO L226 Difference]: Without dead ends: 125277 [2021-07-09 16:22:54,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:22:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125277 states. [2021-07-09 16:22:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125277 to 79852. [2021-07-09 16:22:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:22:56,621 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:22:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:56,621 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:22:56,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:22:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:56,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:56,751 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, 2, 2, 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 16:22:56,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:56,952 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:56,952 INFO L82 PathProgramCache]: Analyzing trace with hash 575813824, now seen corresponding path program 33 times [2021-07-09 16:22:56,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:56,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569474085] [2021-07-09 16:22:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:57,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569474085] [2021-07-09 16:22:57,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569474085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324811810] [2021-07-09 16:22:57,100 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 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 16:22:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:22:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:58,164 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 16:22:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:58,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324811810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:58,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:58,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:58,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686835853] [2021-07-09 16:22:58,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:58,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:58,458 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:59,399 INFO L93 Difference]: Finished difference Result 125532 states and 336473 transitions. [2021-07-09 16:22:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:22:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:59,686 INFO L225 Difference]: With dead ends: 125532 [2021-07-09 16:22:59,686 INFO L226 Difference]: Without dead ends: 125532 [2021-07-09 16:22:59,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125532 states. [2021-07-09 16:23:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125532 to 82372. [2021-07-09 16:23:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82372 states, 82370 states have (on average 2.7014568410829187) internal successors, (222519), 82371 states have internal predecessors, (222519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82372 states to 82372 states and 222519 transitions. [2021-07-09 16:23:01,921 INFO L78 Accepts]: Start accepts. Automaton has 82372 states and 222519 transitions. Word has length 390 [2021-07-09 16:23:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:01,922 INFO L482 AbstractCegarLoop]: Abstraction has 82372 states and 222519 transitions. [2021-07-09 16:23:01,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 82372 states and 222519 transitions. [2021-07-09 16:23:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:02,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:02,054 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, 2, 2, 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 16:23:02,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:02,255 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -201397534, now seen corresponding path program 34 times [2021-07-09 16:23:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:02,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958069019] [2021-07-09 16:23:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:02,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:02,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958069019] [2021-07-09 16:23:02,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958069019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:02,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795074434] [2021-07-09 16:23:02,400 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 16:23:03,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795074434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:03,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:03,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:03,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441672180] [2021-07-09 16:23:03,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:03,462 INFO L87 Difference]: Start difference. First operand 82372 states and 222519 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:04,266 INFO L93 Difference]: Finished difference Result 110512 states and 294631 transitions. [2021-07-09 16:23:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:23:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:04,522 INFO L225 Difference]: With dead ends: 110512 [2021-07-09 16:23:04,522 INFO L226 Difference]: Without dead ends: 110512 [2021-07-09 16:23:04,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110512 states. [2021-07-09 16:23:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110512 to 80912. [2021-07-09 16:23:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80912 states, 80910 states have (on average 2.699839327648004) internal successors, (218444), 80911 states have internal predecessors, (218444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-07-09 16:23:06,523 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-07-09 16:23:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:06,523 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-07-09 16:23:06,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-07-09 16:23:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:06,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:06,673 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, 2, 2, 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 16:23:06,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:06,877 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2067034274, now seen corresponding path program 35 times [2021-07-09 16:23:06,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:06,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509884254] [2021-07-09 16:23:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:07,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509884254] [2021-07-09 16:23:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509884254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:07,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956490540] [2021-07-09 16:23:07,017 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 16:23:07,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:23:07,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:07,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956490540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:07,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:07,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:07,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960828618] [2021-07-09 16:23:07,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:07,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:07,905 INFO L87 Difference]: Start difference. First operand 80912 states and 218444 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:08,825 INFO L93 Difference]: Finished difference Result 137412 states and 368979 transitions. [2021-07-09 16:23:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:23:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:09,131 INFO L225 Difference]: With dead ends: 137412 [2021-07-09 16:23:09,131 INFO L226 Difference]: Without dead ends: 137412 [2021-07-09 16:23:09,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:23:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137412 states. [2021-07-09 16:23:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137412 to 86832. [2021-07-09 16:23:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86832 states, 86830 states have (on average 2.704042381665323) internal successors, (234792), 86831 states have internal predecessors, (234792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86832 states to 86832 states and 234792 transitions. [2021-07-09 16:23:11,645 INFO L78 Accepts]: Start accepts. Automaton has 86832 states and 234792 transitions. Word has length 390 [2021-07-09 16:23:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:11,646 INFO L482 AbstractCegarLoop]: Abstraction has 86832 states and 234792 transitions. [2021-07-09 16:23:11,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 86832 states and 234792 transitions. [2021-07-09 16:23:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:11,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:11,802 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, 2, 2, 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 16:23:12,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 16:23:12,017 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1870967424, now seen corresponding path program 36 times [2021-07-09 16:23:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126076944] [2021-07-09 16:23:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:12,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126076944] [2021-07-09 16:23:12,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126076944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:12,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073023769] [2021-07-09 16:23:12,487 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 16:23:12,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:23:12,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:13,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073023769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:13,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:13,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622858195] [2021-07-09 16:23:13,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:13,285 INFO L87 Difference]: Start difference. First operand 86832 states and 234792 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:14,229 INFO L93 Difference]: Finished difference Result 144457 states and 388581 transitions. [2021-07-09 16:23:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:23:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:14,569 INFO L225 Difference]: With dead ends: 144457 [2021-07-09 16:23:14,570 INFO L226 Difference]: Without dead ends: 144457 [2021-07-09 16:23:14,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:23:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144457 states. [2021-07-09 16:23:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144457 to 87412. [2021-07-09 16:23:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87412 states, 87410 states have (on average 2.7039354764901042) internal successors, (236351), 87411 states have internal predecessors, (236351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87412 states to 87412 states and 236351 transitions. [2021-07-09 16:23:17,068 INFO L78 Accepts]: Start accepts. Automaton has 87412 states and 236351 transitions. Word has length 390 [2021-07-09 16:23:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:17,068 INFO L482 AbstractCegarLoop]: Abstraction has 87412 states and 236351 transitions. [2021-07-09 16:23:17,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 87412 states and 236351 transitions. [2021-07-09 16:23:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:17,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:17,223 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, 2, 2, 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 16:23:17,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:17,424 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1224831710, now seen corresponding path program 37 times [2021-07-09 16:23:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:17,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871015090] [2021-07-09 16:23:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:17,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:17,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871015090] [2021-07-09 16:23:17,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871015090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:17,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505987425] [2021-07-09 16:23:17,558 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 16:23:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505987425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:18,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:18,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:18,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827079706] [2021-07-09 16:23:18,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:18,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:18,369 INFO L87 Difference]: Start difference. First operand 87412 states and 236351 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:19,206 INFO L93 Difference]: Finished difference Result 116352 states and 311553 transitions. [2021-07-09 16:23:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:23:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:19,489 INFO L225 Difference]: With dead ends: 116352 [2021-07-09 16:23:19,490 INFO L226 Difference]: Without dead ends: 116352 [2021-07-09 16:23:19,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:23:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116352 states. [2021-07-09 16:23:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116352 to 85952. [2021-07-09 16:23:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85952 states, 85950 states have (on average 2.702454915648633) internal successors, (232276), 85951 states have internal predecessors, (232276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85952 states to 85952 states and 232276 transitions. [2021-07-09 16:23:21,628 INFO L78 Accepts]: Start accepts. Automaton has 85952 states and 232276 transitions. Word has length 390 [2021-07-09 16:23:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:21,628 INFO L482 AbstractCegarLoop]: Abstraction has 85952 states and 232276 transitions. [2021-07-09 16:23:21,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 85952 states and 232276 transitions. [2021-07-09 16:23:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:21,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:21,768 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, 2, 2, 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 16:23:21,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:21,971 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash 446798912, now seen corresponding path program 38 times [2021-07-09 16:23:21,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:21,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007097138] [2021-07-09 16:23:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:22,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:22,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007097138] [2021-07-09 16:23:22,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007097138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:22,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167032066] [2021-07-09 16:23:22,105 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 16:23:22,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:23:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:22,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167032066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:22,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:22,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:22,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180180572] [2021-07-09 16:23:22,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:22,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:22,910 INFO L87 Difference]: Start difference. First operand 85952 states and 232276 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:23,867 INFO L93 Difference]: Finished difference Result 149432 states and 401906 transitions. [2021-07-09 16:23:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:23:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:24,216 INFO L225 Difference]: With dead ends: 149432 [2021-07-09 16:23:24,216 INFO L226 Difference]: Without dead ends: 149432 [2021-07-09 16:23:24,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:23:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149432 states. [2021-07-09 16:23:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149432 to 88572. [2021-07-09 16:23:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88572 states, 88570 states have (on average 2.704132324714915) internal successors, (239505), 88571 states have internal predecessors, (239505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88572 states to 88572 states and 239505 transitions. [2021-07-09 16:23:26,873 INFO L78 Accepts]: Start accepts. Automaton has 88572 states and 239505 transitions. Word has length 390 [2021-07-09 16:23:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:26,874 INFO L482 AbstractCegarLoop]: Abstraction has 88572 states and 239505 transitions. [2021-07-09 16:23:26,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 88572 states and 239505 transitions. [2021-07-09 16:23:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:27,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:27,040 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, 2, 2, 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 16:23:27,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:27,241 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash 89833314, now seen corresponding path program 39 times [2021-07-09 16:23:27,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:27,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271213354] [2021-07-09 16:23:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:27,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:27,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271213354] [2021-07-09 16:23:27,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271213354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:27,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713027976] [2021-07-09 16:23:27,375 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 16:23:27,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:23:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:28,156 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:28,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713027976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:28,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:28,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385941824] [2021-07-09 16:23:28,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:28,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:28,330 INFO L87 Difference]: Start difference. First operand 88572 states and 239505 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:29,193 INFO L93 Difference]: Finished difference Result 127447 states and 340869 transitions. [2021-07-09 16:23:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:23:29,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:29,514 INFO L225 Difference]: With dead ends: 127447 [2021-07-09 16:23:29,514 INFO L226 Difference]: Without dead ends: 127447 [2021-07-09 16:23:29,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:23:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127447 states. [2021-07-09 16:23:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127447 to 85492. [2021-07-09 16:23:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85492 states, 85490 states have (on average 2.7005614691776816) internal successors, (230871), 85491 states have internal predecessors, (230871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85492 states to 85492 states and 230871 transitions. [2021-07-09 16:23:31,659 INFO L78 Accepts]: Start accepts. Automaton has 85492 states and 230871 transitions. Word has length 390 [2021-07-09 16:23:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 85492 states and 230871 transitions. [2021-07-09 16:23:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 85492 states and 230871 transitions. [2021-07-09 16:23:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:23:31,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:31,800 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, 2, 2, 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 16:23:32,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 16:23:32,001 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash -751337054, now seen corresponding path program 40 times [2021-07-09 16:23:32,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:32,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149612376] [2021-07-09 16:23:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:32,428 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:32,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149612376] [2021-07-09 16:23:32,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149612376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144733961] [2021-07-09 16:23:32,464 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 16:23:32,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:32,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:23:33,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144733961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:33,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:33,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:23:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883687917] [2021-07-09 16:23:33,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:23:33,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:23:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:23:33,226 INFO L87 Difference]: Start difference. First operand 85492 states and 230871 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:34,066 INFO L93 Difference]: Finished difference Result 110267 states and 294603 transitions. [2021-07-09 16:23:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:23:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 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 390 [2021-07-09 16:23:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:34,315 INFO L225 Difference]: With dead ends: 110267 [2021-07-09 16:23:34,315 INFO L226 Difference]: Without dead ends: 110267 [2021-07-09 16:23:34,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:23:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110267 states. [2021-07-09 16:23:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110267 to 86752. [2021-07-09 16:23:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86752 states, 86750 states have (on average 2.701095100864553) internal successors, (234320), 86751 states have internal predecessors, (234320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86752 states to 86752 states and 234320 transitions. [2021-07-09 16:23:36,430 INFO L78 Accepts]: Start accepts. Automaton has 86752 states and 234320 transitions. Word has length 390 [2021-07-09 16:23:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:36,431 INFO L482 AbstractCegarLoop]: Abstraction has 86752 states and 234320 transitions. [2021-07-09 16:23:36,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 86752 states and 234320 transitions. [2021-07-09 16:23:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-07-09 16:23:36,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:36,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:36,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:36,774 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash 657247387, now seen corresponding path program 10 times [2021-07-09 16:23:36,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:36,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638712016] [2021-07-09 16:23:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:23:37,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638712016] [2021-07-09 16:23:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638712016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:37,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172961823] [2021-07-09 16:23:37,330 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 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 16:23:37,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:37,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:23:38,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172961823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:38,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:38,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-09 16:23:38,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611195490] [2021-07-09 16:23:38,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 16:23:38,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 16:23:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:23:38,253 INFO L87 Difference]: Start difference. First operand 86752 states and 234320 transitions. Second operand has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:39,151 INFO L93 Difference]: Finished difference Result 98251 states and 263785 transitions. [2021-07-09 16:23:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:23:39,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 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 394 [2021-07-09 16:23:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:39,361 INFO L225 Difference]: With dead ends: 98251 [2021-07-09 16:23:39,361 INFO L226 Difference]: Without dead ends: 98251 [2021-07-09 16:23:39,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=716, Invalid=1446, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:23:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98251 states. [2021-07-09 16:23:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98251 to 89234. [2021-07-09 16:23:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89234 states, 89232 states have (on average 2.6988076026537566) internal successors, (240820), 89233 states have internal predecessors, (240820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89234 states to 89234 states and 240820 transitions. [2021-07-09 16:23:41,358 INFO L78 Accepts]: Start accepts. Automaton has 89234 states and 240820 transitions. Word has length 394 [2021-07-09 16:23:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:41,358 INFO L482 AbstractCegarLoop]: Abstraction has 89234 states and 240820 transitions. [2021-07-09 16:23:41,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 89234 states and 240820 transitions. [2021-07-09 16:23:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:41,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:41,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:41,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:41,713 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash -279355365, now seen corresponding path program 27 times [2021-07-09 16:23:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077759159] [2021-07-09 16:23:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1348 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:23:42,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077759159] [2021-07-09 16:23:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077759159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:42,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675497478] [2021-07-09 16:23:42,271 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 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 16:23:42,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:23:42,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:43,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675497478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:43,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:43,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-09 16:23:43,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111736265] [2021-07-09 16:23:43,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:43,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:43,328 INFO L87 Difference]: Start difference. First operand 89234 states and 240820 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:44,269 INFO L93 Difference]: Finished difference Result 103444 states and 276915 transitions. [2021-07-09 16:23:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:23:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:23:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:44,526 INFO L225 Difference]: With dead ends: 103444 [2021-07-09 16:23:44,526 INFO L226 Difference]: Without dead ends: 103444 [2021-07-09 16:23:44,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:23:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103444 states. [2021-07-09 16:23:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103444 to 89914. [2021-07-09 16:23:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-09 16:23:46,652 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-09 16:23:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:46,652 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-09 16:23:46,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-09 16:23:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:46,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:46,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:47,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 16:23:47,003 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash -673788487, now seen corresponding path program 28 times [2021-07-09 16:23:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:47,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205419813] [2021-07-09 16:23:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:47,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205419813] [2021-07-09 16:23:47,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205419813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951664617] [2021-07-09 16:23:47,533 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 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 16:23:47,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:47,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951664617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52367853] [2021-07-09 16:23:48,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:48,422 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:49,352 INFO L93 Difference]: Finished difference Result 110429 states and 294732 transitions. [2021-07-09 16:23:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:23:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:23:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:49,658 INFO L225 Difference]: With dead ends: 110429 [2021-07-09 16:23:49,658 INFO L226 Difference]: Without dead ends: 110429 [2021-07-09 16:23:49,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 654.1ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:23:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110429 states. [2021-07-09 16:23:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110429 to 89914. [2021-07-09 16:23:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-09 16:23:51,719 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-09 16:23:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:51,720 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-09 16:23:51,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-09 16:23:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:51,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:51,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:52,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:52,075 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -331676969, now seen corresponding path program 29 times [2021-07-09 16:23:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:52,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726374331] [2021-07-09 16:23:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:52,456 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 16:23:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:52,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726374331] [2021-07-09 16:23:52,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726374331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:52,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076009653] [2021-07-09 16:23:52,571 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 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 16:23:52,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:23:52,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:52,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076009653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:53,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:53,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253718728] [2021-07-09 16:23:53,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:53,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:53,349 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:54,165 INFO L93 Difference]: Finished difference Result 111689 states and 298642 transitions. [2021-07-09 16:23:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:23:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:23:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:54,428 INFO L225 Difference]: With dead ends: 111689 [2021-07-09 16:23:54,428 INFO L226 Difference]: Without dead ends: 111689 [2021-07-09 16:23:54,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:23:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-07-09 16:23:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 88554. [2021-07-09 16:23:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88554 states, 88552 states have (on average 2.698188634926371) internal successors, (238930), 88553 states have internal predecessors, (238930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88554 states to 88554 states and 238930 transitions. [2021-07-09 16:23:56,465 INFO L78 Accepts]: Start accepts. Automaton has 88554 states and 238930 transitions. Word has length 395 [2021-07-09 16:23:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:56,465 INFO L482 AbstractCegarLoop]: Abstraction has 88554 states and 238930 transitions. [2021-07-09 16:23:56,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 88554 states and 238930 transitions. [2021-07-09 16:23:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:56,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:56,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:56,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:56,806 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash -149954699, now seen corresponding path program 30 times [2021-07-09 16:23:56,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:56,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884247128] [2021-07-09 16:23:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:57,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884247128] [2021-07-09 16:23:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884247128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898539966] [2021-07-09 16:23:57,356 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 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 16:23:57,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:23:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898539966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:58,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:58,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69165939] [2021-07-09 16:23:58,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:58,248 INFO L87 Difference]: Start difference. First operand 88554 states and 238930 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:59,156 INFO L93 Difference]: Finished difference Result 117004 states and 312456 transitions. [2021-07-09 16:23:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:23:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:23:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:59,444 INFO L225 Difference]: With dead ends: 117004 [2021-07-09 16:23:59,444 INFO L226 Difference]: Without dead ends: 117004 [2021-07-09 16:23:59,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:23:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117004 states. [2021-07-09 16:24:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117004 to 89814. [2021-07-09 16:24:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89814 states, 89812 states have (on average 2.6987373624905358) internal successors, (242379), 89813 states have internal predecessors, (242379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89814 states to 89814 states and 242379 transitions. [2021-07-09 16:24:01,483 INFO L78 Accepts]: Start accepts. Automaton has 89814 states and 242379 transitions. Word has length 395 [2021-07-09 16:24:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 89814 states and 242379 transitions. [2021-07-09 16:24:01,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 89814 states and 242379 transitions. [2021-07-09 16:24:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:24:01,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:01,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:24:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:02,170 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash 458703763, now seen corresponding path program 31 times [2021-07-09 16:24:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559804152] [2021-07-09 16:24:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:02,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:02,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559804152] [2021-07-09 16:24:02,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559804152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:02,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687833181] [2021-07-09 16:24:02,336 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 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 16:24:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:02,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687833181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:02,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:02,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018298541] [2021-07-09 16:24:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:02,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:02,853 INFO L87 Difference]: Start difference. First operand 89814 states and 242379 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:03,790 INFO L93 Difference]: Finished difference Result 119859 states and 319930 transitions. [2021-07-09 16:24:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:24:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:24:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:04,239 INFO L225 Difference]: With dead ends: 119859 [2021-07-09 16:24:04,239 INFO L226 Difference]: Without dead ends: 119859 [2021-07-09 16:24:04,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:24:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119859 states. [2021-07-09 16:24:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119859 to 91754. [2021-07-09 16:24:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91754 states, 91752 states have (on average 2.6998648530822216) internal successors, (247718), 91753 states have internal predecessors, (247718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91754 states to 91754 states and 247718 transitions. [2021-07-09 16:24:06,437 INFO L78 Accepts]: Start accepts. Automaton has 91754 states and 247718 transitions. Word has length 395 [2021-07-09 16:24:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:06,437 INFO L482 AbstractCegarLoop]: Abstraction has 91754 states and 247718 transitions. [2021-07-09 16:24:06,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 91754 states and 247718 transitions. [2021-07-09 16:24:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:24:06,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:06,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:24:06,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:06,782 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1921716017, now seen corresponding path program 32 times [2021-07-09 16:24:06,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:06,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604753757] [2021-07-09 16:24:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:06,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:06,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604753757] [2021-07-09 16:24:06,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604753757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:06,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439416803] [2021-07-09 16:24:06,945 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 16:24:07,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:07,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439416803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:07,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:07,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972117261] [2021-07-09 16:24:07,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:07,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:07,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:07,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:07,746 INFO L87 Difference]: Start difference. First operand 91754 states and 247718 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:08,621 INFO L93 Difference]: Finished difference Result 120574 states and 321904 transitions. [2021-07-09 16:24:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:24:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:24:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:08,881 INFO L225 Difference]: With dead ends: 120574 [2021-07-09 16:24:08,881 INFO L226 Difference]: Without dead ends: 120574 [2021-07-09 16:24:08,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:24:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120574 states. [2021-07-09 16:24:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120574 to 90494. [2021-07-09 16:24:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-09 16:24:11,093 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-09 16:24:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:11,093 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-09 16:24:11,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-09 16:24:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:24:11,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:11,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:24:11,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:11,462 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash 714941007, now seen corresponding path program 33 times [2021-07-09 16:24:11,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:11,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585238853] [2021-07-09 16:24:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585238853] [2021-07-09 16:24:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585238853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168012211] [2021-07-09 16:24:11,949 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 16:24:12,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:24:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168012211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:12,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:12,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003212734] [2021-07-09 16:24:12,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:12,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:12,753 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:13,680 INFO L93 Difference]: Finished difference Result 116589 states and 311298 transitions. [2021-07-09 16:24:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:24:13,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:24:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:13,969 INFO L225 Difference]: With dead ends: 116589 [2021-07-09 16:24:13,969 INFO L226 Difference]: Without dead ends: 116589 [2021-07-09 16:24:13,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:24:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116589 states. [2021-07-09 16:24:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116589 to 90494. [2021-07-09 16:24:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-09 16:24:16,060 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-09 16:24:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:16,061 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-09 16:24:16,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-09 16:24:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:24:16,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:16,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:24:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:16,769 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash 603413741, now seen corresponding path program 34 times [2021-07-09 16:24:16,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938334001] [2021-07-09 16:24:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:16,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:16,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938334001] [2021-07-09 16:24:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938334001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:16,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957028025] [2021-07-09 16:24:16,932 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 16:24:17,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:17,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:24:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:24:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957028025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:17,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:17,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:24:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988448650] [2021-07-09 16:24:17,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:24:17,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:17,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:24:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:17,780 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:18,721 INFO L93 Difference]: Finished difference Result 113179 states and 302510 transitions. [2021-07-09 16:24:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 16:24:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 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 395 [2021-07-09 16:24:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:18,965 INFO L225 Difference]: With dead ends: 113179 [2021-07-09 16:24:18,965 INFO L226 Difference]: Without dead ends: 113179 [2021-07-09 16:24:18,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 477.7ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:24:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113179 states. [2021-07-09 16:24:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113179 to 88454. [2021-07-09 16:24:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88454 states, 88452 states have (on average 2.6974969474969477) internal successors, (238599), 88453 states have internal predecessors, (238599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88454 states to 88454 states and 238599 transitions. [2021-07-09 16:24:20,977 INFO L78 Accepts]: Start accepts. Automaton has 88454 states and 238599 transitions. Word has length 395 [2021-07-09 16:24:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:20,978 INFO L482 AbstractCegarLoop]: Abstraction has 88454 states and 238599 transitions. [2021-07-09 16:24:20,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 88454 states and 238599 transitions. [2021-07-09 16:24:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:21,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:21,457 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, 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 16:24:21,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 16:24:21,658 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:21,658 INFO L82 PathProgramCache]: Analyzing trace with hash 444637334, now seen corresponding path program 41 times [2021-07-09 16:24:21,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:21,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860923546] [2021-07-09 16:24:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:21,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:21,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860923546] [2021-07-09 16:24:21,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860923546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:21,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101048724] [2021-07-09 16:24:21,804 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 16:24:22,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:24:22,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:22,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101048724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:22,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:22,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:22,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488513709] [2021-07-09 16:24:22,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:22,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:22,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:22,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:22,519 INFO L87 Difference]: Start difference. First operand 88454 states and 238599 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:23,436 INFO L93 Difference]: Finished difference Result 129819 states and 347657 transitions. [2021-07-09 16:24:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:24:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:23,921 INFO L225 Difference]: With dead ends: 129819 [2021-07-09 16:24:23,921 INFO L226 Difference]: Without dead ends: 129819 [2021-07-09 16:24:23,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:24:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129819 states. [2021-07-09 16:24:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129819 to 91074. [2021-07-09 16:24:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91074 states, 91072 states have (on average 2.6992709065354883) internal successors, (245828), 91073 states have internal predecessors, (245828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91074 states to 91074 states and 245828 transitions. [2021-07-09 16:24:26,296 INFO L78 Accepts]: Start accepts. Automaton has 91074 states and 245828 transitions. Word has length 419 [2021-07-09 16:24:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:26,296 INFO L482 AbstractCegarLoop]: Abstraction has 91074 states and 245828 transitions. [2021-07-09 16:24:26,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 91074 states and 245828 transitions. [2021-07-09 16:24:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:26,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:26,480 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, 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 16:24:26,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:26,699 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash 911742324, now seen corresponding path program 42 times [2021-07-09 16:24:26,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:26,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705034836] [2021-07-09 16:24:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:26,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:26,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705034836] [2021-07-09 16:24:26,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705034836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:26,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125599653] [2021-07-09 16:24:26,875 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 16:24:27,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:24:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:27,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:27,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125599653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:27,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:27,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:27,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694009099] [2021-07-09 16:24:27,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:27,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:27,903 INFO L87 Difference]: Start difference. First operand 91074 states and 245828 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:28,873 INFO L93 Difference]: Finished difference Result 156634 states and 420817 transitions. [2021-07-09 16:24:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:28,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:29,269 INFO L225 Difference]: With dead ends: 156634 [2021-07-09 16:24:29,269 INFO L226 Difference]: Without dead ends: 156634 [2021-07-09 16:24:29,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156634 states. [2021-07-09 16:24:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156634 to 93114. [2021-07-09 16:24:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93114 states, 93112 states have (on average 2.7010267205086347) internal successors, (251498), 93113 states have internal predecessors, (251498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93114 states to 93114 states and 251498 transitions. [2021-07-09 16:24:32,010 INFO L78 Accepts]: Start accepts. Automaton has 93114 states and 251498 transitions. Word has length 419 [2021-07-09 16:24:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:32,011 INFO L482 AbstractCegarLoop]: Abstraction has 93114 states and 251498 transitions. [2021-07-09 16:24:32,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 93114 states and 251498 transitions. [2021-07-09 16:24:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:32,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:32,184 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, 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 16:24:32,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 16:24:32,385 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 554776726, now seen corresponding path program 43 times [2021-07-09 16:24:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:32,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785340306] [2021-07-09 16:24:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:32,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785340306] [2021-07-09 16:24:32,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785340306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200841112] [2021-07-09 16:24:32,532 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 16:24:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:33,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200841112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:33,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:33,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:33,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242682032] [2021-07-09 16:24:33,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:33,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:33,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:33,287 INFO L87 Difference]: Start difference. First operand 93114 states and 251498 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:34,247 INFO L93 Difference]: Finished difference Result 132029 states and 353121 transitions. [2021-07-09 16:24:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:34,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:34,548 INFO L225 Difference]: With dead ends: 132029 [2021-07-09 16:24:34,548 INFO L226 Difference]: Without dead ends: 132029 [2021-07-09 16:24:34,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132029 states. [2021-07-09 16:24:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132029 to 94374. [2021-07-09 16:24:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94374 states, 94372 states have (on average 2.701511041410588) internal successors, (254947), 94373 states have internal predecessors, (254947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94374 states to 94374 states and 254947 transitions. [2021-07-09 16:24:36,783 INFO L78 Accepts]: Start accepts. Automaton has 94374 states and 254947 transitions. Word has length 419 [2021-07-09 16:24:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:36,784 INFO L482 AbstractCegarLoop]: Abstraction has 94374 states and 254947 transitions. [2021-07-09 16:24:36,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 94374 states and 254947 transitions. [2021-07-09 16:24:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:36,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:36,938 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, 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 16:24:37,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 16:24:37,139 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash 55104210, now seen corresponding path program 44 times [2021-07-09 16:24:37,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:37,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275039893] [2021-07-09 16:24:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:37,537 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:24:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:37,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:37,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275039893] [2021-07-09 16:24:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275039893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:37,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656421503] [2021-07-09 16:24:37,622 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 16:24:37,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:37,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:38,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656421503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:38,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:38,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:38,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991314238] [2021-07-09 16:24:38,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:38,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:38,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:38,173 INFO L87 Difference]: Start difference. First operand 94374 states and 254947 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:39,025 INFO L93 Difference]: Finished difference Result 140364 states and 376050 transitions. [2021-07-09 16:24:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:24:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:39,336 INFO L225 Difference]: With dead ends: 140364 [2021-07-09 16:24:39,336 INFO L226 Difference]: Without dead ends: 140364 [2021-07-09 16:24:39,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:24:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140364 states. [2021-07-09 16:24:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140364 to 95734. [2021-07-09 16:24:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:24:41,920 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:24:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:41,920 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:24:41,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:24:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:42,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:42,077 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, 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 16:24:42,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:42,277 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:42,278 INFO L82 PathProgramCache]: Analyzing trace with hash -301861388, now seen corresponding path program 45 times [2021-07-09 16:24:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:42,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489595974] [2021-07-09 16:24:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:42,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:42,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489595974] [2021-07-09 16:24:42,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489595974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:42,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835625298] [2021-07-09 16:24:42,425 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 16:24:42,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:24:42,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:43,087 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:24:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:43,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835625298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:43,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:43,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809016309] [2021-07-09 16:24:43,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:43,432 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:44,306 INFO L93 Difference]: Finished difference Result 144764 states and 387949 transitions. [2021-07-09 16:24:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:44,654 INFO L225 Difference]: With dead ends: 144764 [2021-07-09 16:24:44,654 INFO L226 Difference]: Without dead ends: 144764 [2021-07-09 16:24:44,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144764 states. [2021-07-09 16:24:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144764 to 95734. [2021-07-09 16:24:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:24:47,311 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:24:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:47,311 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:24:47,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:24:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:47,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:47,494 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, 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 16:24:47,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:47,695 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash 897306774, now seen corresponding path program 46 times [2021-07-09 16:24:47,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:47,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597091068] [2021-07-09 16:24:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:47,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:47,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597091068] [2021-07-09 16:24:47,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597091068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:47,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522457306] [2021-07-09 16:24:47,846 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 16:24:48,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:49,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522457306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:49,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:49,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:49,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125875864] [2021-07-09 16:24:49,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:49,008 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:49,863 INFO L93 Difference]: Finished difference Result 124319 states and 331120 transitions. [2021-07-09 16:24:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:50,148 INFO L225 Difference]: With dead ends: 124319 [2021-07-09 16:24:50,148 INFO L226 Difference]: Without dead ends: 124319 [2021-07-09 16:24:50,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124319 states. [2021-07-09 16:24:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124319 to 91374. [2021-07-09 16:24:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91374 states, 91372 states have (on average 2.7008821083045134) internal successors, (246785), 91373 states have internal predecessors, (246785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91374 states to 91374 states and 246785 transitions. [2021-07-09 16:24:52,314 INFO L78 Accepts]: Start accepts. Automaton has 91374 states and 246785 transitions. Word has length 419 [2021-07-09 16:24:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:52,315 INFO L482 AbstractCegarLoop]: Abstraction has 91374 states and 246785 transitions. [2021-07-09 16:24:52,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 91374 states and 246785 transitions. [2021-07-09 16:24:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:52,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:52,490 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, 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 16:24:52,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:52,691 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash -692238348, now seen corresponding path program 47 times [2021-07-09 16:24:52,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:52,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502046164] [2021-07-09 16:24:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502046164] [2021-07-09 16:24:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502046164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839558648] [2021-07-09 16:24:53,154 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 16:24:53,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:24:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:53,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839558648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:53,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:53,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:53,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006802220] [2021-07-09 16:24:53,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:53,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:53,832 INFO L87 Difference]: Start difference. First operand 91374 states and 246785 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:54,643 INFO L93 Difference]: Finished difference Result 136274 states and 365083 transitions. [2021-07-09 16:24:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:54,962 INFO L225 Difference]: With dead ends: 136274 [2021-07-09 16:24:54,962 INFO L226 Difference]: Without dead ends: 136274 [2021-07-09 16:24:54,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136274 states. [2021-07-09 16:24:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136274 to 92634. [2021-07-09 16:24:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92634 states, 92632 states have (on average 2.701377493738665) internal successors, (250234), 92633 states have internal predecessors, (250234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92634 states to 92634 states and 250234 transitions. [2021-07-09 16:24:57,483 INFO L78 Accepts]: Start accepts. Automaton has 92634 states and 250234 transitions. Word has length 419 [2021-07-09 16:24:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:57,484 INFO L482 AbstractCegarLoop]: Abstraction has 92634 states and 250234 transitions. [2021-07-09 16:24:57,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92634 states and 250234 transitions. [2021-07-09 16:24:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:57,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:57,656 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, 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 16:24:57,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 16:24:57,858 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash -225133358, now seen corresponding path program 48 times [2021-07-09 16:24:57,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:57,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57631500] [2021-07-09 16:24:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:57,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:57,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57631500] [2021-07-09 16:24:57,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57631500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:57,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285890506] [2021-07-09 16:24:57,990 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 16:24:58,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:24:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:59,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285890506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:59,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:59,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:59,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216566823] [2021-07-09 16:24:59,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:59,056 INFO L87 Difference]: Start difference. First operand 92634 states and 250234 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:59,963 INFO L93 Difference]: Finished difference Result 145904 states and 391249 transitions. [2021-07-09 16:24:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:00,480 INFO L225 Difference]: With dead ends: 145904 [2021-07-09 16:25:00,480 INFO L226 Difference]: Without dead ends: 145904 [2021-07-09 16:25:00,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:25:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145904 states. [2021-07-09 16:25:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145904 to 95734. [2021-07-09 16:25:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:25:03,038 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:25:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:03,039 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:25:03,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:25:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:25:03,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:03,599 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, 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 16:25:03,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:03,821 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -582098956, now seen corresponding path program 49 times [2021-07-09 16:25:03,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:03,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312518621] [2021-07-09 16:25:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:25:03,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:03,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312518621] [2021-07-09 16:25:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312518621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:03,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556547128] [2021-07-09 16:25:03,966 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 16:25:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:25:04,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556547128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:04,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:04,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:04,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786043795] [2021-07-09 16:25:04,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:04,537 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:05,375 INFO L93 Difference]: Finished difference Result 121809 states and 324362 transitions. [2021-07-09 16:25:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:25:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:25:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:05,654 INFO L225 Difference]: With dead ends: 121809 [2021-07-09 16:25:05,654 INFO L226 Difference]: Without dead ends: 121809 [2021-07-09 16:25:05,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:25:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121809 states. [2021-07-09 16:25:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121809 to 90114. [2021-07-09 16:25:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90114 states, 90112 states have (on average 2.7003728693181817) internal successors, (243336), 90113 states have internal predecessors, (243336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90114 states to 90114 states and 243336 transitions. [2021-07-09 16:25:08,051 INFO L78 Accepts]: Start accepts. Automaton has 90114 states and 243336 transitions. Word has length 419 [2021-07-09 16:25:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 90114 states and 243336 transitions. [2021-07-09 16:25:08,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 90114 states and 243336 transitions. [2021-07-09 16:25:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:25:08,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:08,217 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, 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 16:25:08,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-09 16:25:08,421 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash -67426606, now seen corresponding path program 50 times [2021-07-09 16:25:08,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:08,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676660423] [2021-07-09 16:25:08,421 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 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:25:08,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676660423] [2021-07-09 16:25:08,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676660423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884008540] [2021-07-09 16:25:08,556 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 16:25:08,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:08,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:09,192 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:25:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884008540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:09,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:09,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023747574] [2021-07-09 16:25:09,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:09,365 INFO L87 Difference]: Start difference. First operand 90114 states and 243336 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:10,266 INFO L93 Difference]: Finished difference Result 135089 states and 360890 transitions. [2021-07-09 16:25:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:25:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:25:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:10,609 INFO L225 Difference]: With dead ends: 135089 [2021-07-09 16:25:10,610 INFO L226 Difference]: Without dead ends: 135089 [2021-07-09 16:25:10,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135089 states. [2021-07-09 16:25:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135089 to 101354. [2021-07-09 16:25:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101354 states, 101352 states have (on average 2.7049688215328755) internal successors, (274154), 101353 states have internal predecessors, (274154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 274154 transitions. [2021-07-09 16:25:13,366 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 274154 transitions. Word has length 419 [2021-07-09 16:25:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:13,367 INFO L482 AbstractCegarLoop]: Abstraction has 101354 states and 274154 transitions. [2021-07-09 16:25:13,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 274154 transitions. [2021-07-09 16:25:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:13,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:13,572 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, 2, 2, 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 16:25:13,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:13,773 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -946885319, now seen corresponding path program 51 times [2021-07-09 16:25:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195850907] [2021-07-09 16:25:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:13,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:13,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195850907] [2021-07-09 16:25:13,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195850907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:13,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500104415] [2021-07-09 16:25:13,955 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 16:25:14,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:25:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:14,892 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:15,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500104415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:15,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:15,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:15,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817918427] [2021-07-09 16:25:15,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:15,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:15,166 INFO L87 Difference]: Start difference. First operand 101354 states and 274154 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:16,082 INFO L93 Difference]: Finished difference Result 139589 states and 374175 transitions. [2021-07-09 16:25:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:25:16,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:16,401 INFO L225 Difference]: With dead ends: 139589 [2021-07-09 16:25:16,401 INFO L226 Difference]: Without dead ends: 139589 [2021-07-09 16:25:16,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:25:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139589 states. [2021-07-09 16:25:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139589 to 102714. [2021-07-09 16:25:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102714 states, 102712 states have (on average 2.705954513591401) internal successors, (277934), 102713 states have internal predecessors, (277934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102714 states to 102714 states and 277934 transitions. [2021-07-09 16:25:19,185 INFO L78 Accepts]: Start accepts. Automaton has 102714 states and 277934 transitions. Word has length 424 [2021-07-09 16:25:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:19,186 INFO L482 AbstractCegarLoop]: Abstraction has 102714 states and 277934 transitions. [2021-07-09 16:25:19,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 102714 states and 277934 transitions. [2021-07-09 16:25:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:19,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:19,376 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, 2, 2, 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 16:25:19,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:19,577 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1303850917, now seen corresponding path program 52 times [2021-07-09 16:25:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:19,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390575745] [2021-07-09 16:25:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:19,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390575745] [2021-07-09 16:25:19,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390575745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:19,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357204228] [2021-07-09 16:25:19,755 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 16:25:20,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:20,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:21,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357204228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:21,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:21,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:21,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653319996] [2021-07-09 16:25:21,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:21,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:21,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:21,019 INFO L87 Difference]: Start difference. First operand 102714 states and 277934 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:21,992 INFO L93 Difference]: Finished difference Result 144454 states and 387269 transitions. [2021-07-09 16:25:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:25:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:22,318 INFO L225 Difference]: With dead ends: 144454 [2021-07-09 16:25:22,318 INFO L226 Difference]: Without dead ends: 144454 [2021-07-09 16:25:22,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:25:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144454 states. [2021-07-09 16:25:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144454 to 102034. [2021-07-09 16:25:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:25:25,173 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:25:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:25,173 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:25:25,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:25:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:25,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:25,379 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, 2, 2, 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 16:25:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 16:25:25,581 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -104682755, now seen corresponding path program 53 times [2021-07-09 16:25:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331662980] [2021-07-09 16:25:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:25,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331662980] [2021-07-09 16:25:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331662980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503969656] [2021-07-09 16:25:25,766 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 16:25:26,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:25:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:26,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:26,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503969656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:26,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:26,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763294187] [2021-07-09 16:25:26,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:26,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:26,731 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:27,687 INFO L93 Difference]: Finished difference Result 147569 states and 395715 transitions. [2021-07-09 16:25:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:25:27,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:28,021 INFO L225 Difference]: With dead ends: 147569 [2021-07-09 16:25:28,021 INFO L226 Difference]: Without dead ends: 147569 [2021-07-09 16:25:28,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:25:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147569 states. [2021-07-09 16:25:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147569 to 102034. [2021-07-09 16:25:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:25:30,835 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:25:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:30,836 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:25:30,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:25:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:31,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:31,049 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, 2, 2, 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 16:25:31,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 16:25:31,251 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -881894113, now seen corresponding path program 54 times [2021-07-09 16:25:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:31,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607676960] [2021-07-09 16:25:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:31,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607676960] [2021-07-09 16:25:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607676960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90817308] [2021-07-09 16:25:31,793 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 16:25:32,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:25:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:32,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90817308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:32,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:32,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:32,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212356398] [2021-07-09 16:25:32,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:32,732 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:33,691 INFO L93 Difference]: Finished difference Result 143364 states and 384352 transitions. [2021-07-09 16:25:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:25:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:34,034 INFO L225 Difference]: With dead ends: 143364 [2021-07-09 16:25:34,034 INFO L226 Difference]: Without dead ends: 143364 [2021-07-09 16:25:34,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:25:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143364 states. [2021-07-09 16:25:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143364 to 103974. [2021-07-09 16:25:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:37,152 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:37,152 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:37,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:37,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:37,403 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, 2, 2, 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 16:25:37,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:37,617 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1875310911, now seen corresponding path program 55 times [2021-07-09 16:25:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:37,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229646619] [2021-07-09 16:25:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:37,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:37,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229646619] [2021-07-09 16:25:37,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229646619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:37,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116429569] [2021-07-09 16:25:37,809 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 16:25:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:38,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116429569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:38,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:38,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:38,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210851671] [2021-07-09 16:25:38,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:38,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:38,707 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:39,623 INFO L93 Difference]: Finished difference Result 144574 states and 387062 transitions. [2021-07-09 16:25:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:39,972 INFO L225 Difference]: With dead ends: 144574 [2021-07-09 16:25:39,972 INFO L226 Difference]: Without dead ends: 144574 [2021-07-09 16:25:39,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:25:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144574 states. [2021-07-09 16:25:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144574 to 103974. [2021-07-09 16:25:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:42,656 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:42,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:42,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:42,873 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, 2, 2, 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 16:25:43,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 16:25:43,073 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 243386339, now seen corresponding path program 56 times [2021-07-09 16:25:43,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:43,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363331688] [2021-07-09 16:25:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:43,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:43,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363331688] [2021-07-09 16:25:43,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363331688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:43,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058262754] [2021-07-09 16:25:43,614 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 16:25:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:44,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058262754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:44,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:44,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:44,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712605487] [2021-07-09 16:25:44,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:44,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:44,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:44,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:44,174 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:45,084 INFO L93 Difference]: Finished difference Result 132039 states and 352888 transitions. [2021-07-09 16:25:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:45,412 INFO L225 Difference]: With dead ends: 132039 [2021-07-09 16:25:45,412 INFO L226 Difference]: Without dead ends: 132039 [2021-07-09 16:25:45,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:25:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132039 states. [2021-07-09 16:25:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132039 to 103974. [2021-07-09 16:25:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:48,004 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:48,004 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:48,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:48,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:48,201 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, 2, 2, 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 16:25:48,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 16:25:48,402 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:48,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:48,402 INFO L82 PathProgramCache]: Analyzing trace with hash -359993189, now seen corresponding path program 57 times [2021-07-09 16:25:48,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:48,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034506654] [2021-07-09 16:25:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034506654] [2021-07-09 16:25:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034506654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:48,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55430584] [2021-07-09 16:25:48,961 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 16:25:49,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:25:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:49,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55430584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:49,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:49,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:49,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402467765] [2021-07-09 16:25:49,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:49,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:49,941 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:50,939 INFO L93 Difference]: Finished difference Result 153639 states and 411702 transitions. [2021-07-09 16:25:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:25:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:51,485 INFO L225 Difference]: With dead ends: 153639 [2021-07-09 16:25:51,486 INFO L226 Difference]: Without dead ends: 153639 [2021-07-09 16:25:51,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:25:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153639 states. [2021-07-09 16:25:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153639 to 104654. [2021-07-09 16:25:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104654 states, 104652 states have (on average 2.7068092344150134) internal successors, (283273), 104653 states have internal predecessors, (283273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104654 states to 104654 states and 283273 transitions. [2021-07-09 16:25:54,103 INFO L78 Accepts]: Start accepts. Automaton has 104654 states and 283273 transitions. Word has length 424 [2021-07-09 16:25:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:54,104 INFO L482 AbstractCegarLoop]: Abstraction has 104654 states and 283273 transitions. [2021-07-09 16:25:54,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 104654 states and 283273 transitions. [2021-07-09 16:25:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:54,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:54,649 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, 2, 2, 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 16:25:54,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 16:25:54,850 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash -716958787, now seen corresponding path program 58 times [2021-07-09 16:25:54,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:54,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471567664] [2021-07-09 16:25:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:55,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471567664] [2021-07-09 16:25:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471567664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242363656] [2021-07-09 16:25:55,020 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 16:25:55,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:56,103 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242363656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:56,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:56,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:56,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760001179] [2021-07-09 16:25:56,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:56,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:56,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:56,114 INFO L87 Difference]: Start difference. First operand 104654 states and 283273 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:57,200 INFO L93 Difference]: Finished difference Result 160034 states and 429296 transitions. [2021-07-09 16:25:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:25:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:25:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:57,609 INFO L225 Difference]: With dead ends: 160034 [2021-07-09 16:25:57,609 INFO L226 Difference]: Without dead ends: 160034 [2021-07-09 16:25:57,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:25:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160034 states. [2021-07-09 16:25:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160034 to 103974. [2021-07-09 16:25:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:26:00,497 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:26:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:00,498 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:26:00,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:26:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:00,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:00,690 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, 2, 2, 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 16:26:00,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:00,893 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash 482209375, now seen corresponding path program 59 times [2021-07-09 16:26:00,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:00,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96112072] [2021-07-09 16:26:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:01,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:01,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96112072] [2021-07-09 16:26:01,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96112072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:01,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464516212] [2021-07-09 16:26:01,050 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 16:26:01,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:26:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464516212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:01,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:01,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768418912] [2021-07-09 16:26:01,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:01,960 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:02,951 INFO L93 Difference]: Finished difference Result 162759 states and 436942 transitions. [2021-07-09 16:26:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:26:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:03,316 INFO L225 Difference]: With dead ends: 162759 [2021-07-09 16:26:03,316 INFO L226 Difference]: Without dead ends: 162759 [2021-07-09 16:26:03,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=458, Invalid=1264, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162759 states. [2021-07-09 16:26:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162759 to 102034. [2021-07-09 16:26:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:26:06,152 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:26:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:06,153 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:26:06,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:26:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:06,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:06,346 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, 2, 2, 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 16:26:06,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 16:26:06,546 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash -295001983, now seen corresponding path program 60 times [2021-07-09 16:26:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708542163] [2021-07-09 16:26:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708542163] [2021-07-09 16:26:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708542163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031911061] [2021-07-09 16:26:07,118 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 16:26:07,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:26:07,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:07,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:08,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031911061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:08,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:08,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723058957] [2021-07-09 16:26:08,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:08,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:08,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:08,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:08,060 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:09,054 INFO L93 Difference]: Finished difference Result 159244 states and 427729 transitions. [2021-07-09 16:26:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:26:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:09,712 INFO L225 Difference]: With dead ends: 159244 [2021-07-09 16:26:09,713 INFO L226 Difference]: Without dead ends: 159244 [2021-07-09 16:26:09,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:26:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159244 states. [2021-07-09 16:26:12,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159244 to 103294. [2021-07-09 16:26:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-09 16:26:12,437 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-09 16:26:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:12,438 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-09 16:26:12,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-09 16:26:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:13,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:13,000 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, 2, 2, 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 16:26:13,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 16:26:13,209 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1288418781, now seen corresponding path program 61 times [2021-07-09 16:26:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:13,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047541111] [2021-07-09 16:26:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:13,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:13,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047541111] [2021-07-09 16:26:13,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047541111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:13,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271329645] [2021-07-09 16:26:13,368 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 16:26:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271329645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:13,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:13,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054730515] [2021-07-09 16:26:13,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:13,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:13,925 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:14,216 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:26:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:14,913 INFO L93 Difference]: Finished difference Result 134784 states and 359855 transitions. [2021-07-09 16:26:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:26:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:15,430 INFO L225 Difference]: With dead ends: 134784 [2021-07-09 16:26:15,430 INFO L226 Difference]: Without dead ends: 134784 [2021-07-09 16:26:15,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:26:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134784 states. [2021-07-09 16:26:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134784 to 98054. [2021-07-09 16:26:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98054 states, 98052 states have (on average 2.7030045282095214) internal successors, (265035), 98053 states have internal predecessors, (265035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98054 states to 98054 states and 265035 transitions. [2021-07-09 16:26:17,696 INFO L78 Accepts]: Start accepts. Automaton has 98054 states and 265035 transitions. Word has length 424 [2021-07-09 16:26:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:17,697 INFO L482 AbstractCegarLoop]: Abstraction has 98054 states and 265035 transitions. [2021-07-09 16:26:17,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 98054 states and 265035 transitions. [2021-07-09 16:26:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:17,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:17,866 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, 2, 2, 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 16:26:18,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 16:26:18,067 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -769938307, now seen corresponding path program 62 times [2021-07-09 16:26:18,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:18,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304598912] [2021-07-09 16:26:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304598912] [2021-07-09 16:26:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304598912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83194085] [2021-07-09 16:26:18,612 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 16:26:18,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:18,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:19,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83194085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:19,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:19,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:19,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776966840] [2021-07-09 16:26:19,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:19,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:19,178 INFO L87 Difference]: Start difference. First operand 98054 states and 265035 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:20,213 INFO L93 Difference]: Finished difference Result 164019 states and 440596 transitions. [2021-07-09 16:26:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:26:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:20,817 INFO L225 Difference]: With dead ends: 164019 [2021-07-09 16:26:20,817 INFO L226 Difference]: Without dead ends: 164019 [2021-07-09 16:26:20,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164019 states. [2021-07-09 16:26:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164019 to 103974. [2021-07-09 16:26:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:26:23,834 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:26:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:23,835 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:26:23,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:26:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:24,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:24,034 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, 2, 2, 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 16:26:24,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:24,234 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1126903905, now seen corresponding path program 63 times [2021-07-09 16:26:24,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:24,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125803211] [2021-07-09 16:26:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:24,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:24,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125803211] [2021-07-09 16:26:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125803211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:24,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129630037] [2021-07-09 16:26:24,396 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 16:26:24,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:26:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:25,254 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:26:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129630037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795403684] [2021-07-09 16:26:25,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:25,502 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:26,582 INFO L93 Difference]: Finished difference Result 175214 states and 471458 transitions. [2021-07-09 16:26:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:26:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:26,986 INFO L225 Difference]: With dead ends: 175214 [2021-07-09 16:26:26,986 INFO L226 Difference]: Without dead ends: 175214 [2021-07-09 16:26:26,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=469, Invalid=1337, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175214 states. [2021-07-09 16:26:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175214 to 103294. [2021-07-09 16:26:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-09 16:26:29,866 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-09 16:26:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:29,866 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-09 16:26:29,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-09 16:26:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:30,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:30,439 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, 2, 2, 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 16:26:30,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:30,639 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:30,640 INFO L82 PathProgramCache]: Analyzing trace with hash 72264257, now seen corresponding path program 64 times [2021-07-09 16:26:30,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:30,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319994863] [2021-07-09 16:26:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:30,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:30,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319994863] [2021-07-09 16:26:30,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319994863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:30,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21003270] [2021-07-09 16:26:30,800 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 16:26:31,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:31,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21003270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:31,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:31,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:31,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325215336] [2021-07-09 16:26:31,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:31,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:31,721 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:33,044 INFO L93 Difference]: Finished difference Result 174659 states and 470136 transitions. [2021-07-09 16:26:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:26:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:33,504 INFO L225 Difference]: With dead ends: 174659 [2021-07-09 16:26:33,505 INFO L226 Difference]: Without dead ends: 174659 [2021-07-09 16:26:33,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174659 states. [2021-07-09 16:26:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174659 to 105814. [2021-07-09 16:26:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105814 states, 105812 states have (on average 2.7066022757343213) internal successors, (286391), 105813 states have internal predecessors, (286391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105814 states to 105814 states and 286391 transitions. [2021-07-09 16:26:36,534 INFO L78 Accepts]: Start accepts. Automaton has 105814 states and 286391 transitions. Word has length 424 [2021-07-09 16:26:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:36,534 INFO L482 AbstractCegarLoop]: Abstraction has 105814 states and 286391 transitions. [2021-07-09 16:26:36,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 105814 states and 286391 transitions. [2021-07-09 16:26:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:36,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:36,740 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, 2, 2, 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 16:26:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:36,941 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -704947101, now seen corresponding path program 65 times [2021-07-09 16:26:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737829411] [2021-07-09 16:26:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:37,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:37,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737829411] [2021-07-09 16:26:37,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737829411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:37,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504842107] [2021-07-09 16:26:37,501 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 16:26:37,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:26:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504842107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:38,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:38,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806764799] [2021-07-09 16:26:38,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:38,186 INFO L87 Difference]: Start difference. First operand 105814 states and 286391 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:39,134 INFO L93 Difference]: Finished difference Result 141204 states and 378336 transitions. [2021-07-09 16:26:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:26:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:39,640 INFO L225 Difference]: With dead ends: 141204 [2021-07-09 16:26:39,640 INFO L226 Difference]: Without dead ends: 141204 [2021-07-09 16:26:39,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141204 states. [2021-07-09 16:26:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141204 to 104354. [2021-07-09 16:26:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104354 states, 104352 states have (on average 2.705420116528672) internal successors, (282316), 104353 states have internal predecessors, (282316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104354 states to 104354 states and 282316 transitions. [2021-07-09 16:26:42,105 INFO L78 Accepts]: Start accepts. Automaton has 104354 states and 282316 transitions. Word has length 424 [2021-07-09 16:26:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:42,105 INFO L482 AbstractCegarLoop]: Abstraction has 104354 states and 282316 transitions. [2021-07-09 16:26:42,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 104354 states and 282316 transitions. [2021-07-09 16:26:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:42,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:42,673 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, 2, 2, 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 16:26:42,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 16:26:42,885 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1724383455, now seen corresponding path program 66 times [2021-07-09 16:26:42,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:42,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769267983] [2021-07-09 16:26:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:43,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769267983] [2021-07-09 16:26:43,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769267983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436443228] [2021-07-09 16:26:43,043 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 16:26:43,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:26:43,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:43,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436443228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:43,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:43,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:43,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46476967] [2021-07-09 16:26:43,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:43,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:43,934 INFO L87 Difference]: Start difference. First operand 104354 states and 282316 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:45,275 INFO L93 Difference]: Finished difference Result 183049 states and 492560 transitions. [2021-07-09 16:26:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:26:45,275 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:45,965 INFO L225 Difference]: With dead ends: 183049 [2021-07-09 16:26:45,966 INFO L226 Difference]: Without dead ends: 183049 [2021-07-09 16:26:45,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183049 states. [2021-07-09 16:26:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183049 to 110274. [2021-07-09 16:26:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110274 states, 110272 states have (on average 2.708430063842136) internal successors, (298664), 110273 states have internal predecessors, (298664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110274 states to 110274 states and 298664 transitions. [2021-07-09 16:26:49,249 INFO L78 Accepts]: Start accepts. Automaton has 110274 states and 298664 transitions. Word has length 424 [2021-07-09 16:26:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:49,250 INFO L482 AbstractCegarLoop]: Abstraction has 110274 states and 298664 transitions. [2021-07-09 16:26:49,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 110274 states and 298664 transitions. [2021-07-09 16:26:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:49,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:49,454 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, 2, 2, 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 16:26:49,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 16:26:49,655 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1367417857, now seen corresponding path program 67 times [2021-07-09 16:26:49,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:49,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335503032] [2021-07-09 16:26:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335503032] [2021-07-09 16:26:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335503032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250086282] [2021-07-09 16:26:50,209 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 16:26:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:50,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250086282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:50,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:50,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417980751] [2021-07-09 16:26:50,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:50,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:50,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:50,783 INFO L87 Difference]: Start difference. First operand 110274 states and 298664 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:51,898 INFO L93 Difference]: Finished difference Result 191414 states and 515964 transitions. [2021-07-09 16:26:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:26:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:52,655 INFO L225 Difference]: With dead ends: 191414 [2021-07-09 16:26:52,655 INFO L226 Difference]: Without dead ends: 191414 [2021-07-09 16:26:52,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1336, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191414 states. [2021-07-09 16:26:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191414 to 110854. [2021-07-09 16:26:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110854 states, 110852 states have (on average 2.7083228087900983) internal successors, (300223), 110853 states have internal predecessors, (300223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110854 states to 110854 states and 300223 transitions. [2021-07-09 16:26:55,827 INFO L78 Accepts]: Start accepts. Automaton has 110854 states and 300223 transitions. Word has length 424 [2021-07-09 16:26:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:55,828 INFO L482 AbstractCegarLoop]: Abstraction has 110854 states and 300223 transitions. [2021-07-09 16:26:55,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 110854 states and 300223 transitions. [2021-07-09 16:26:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:56,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:56,064 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, 2, 2, 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 16:26:56,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 16:26:56,265 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1728381277, now seen corresponding path program 68 times [2021-07-09 16:26:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:56,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348792655] [2021-07-09 16:26:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:56,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:56,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348792655] [2021-07-09 16:26:56,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348792655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:56,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779830360] [2021-07-09 16:26:56,775 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 16:26:56,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:56,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:57,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779830360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:57,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:57,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:57,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209331347] [2021-07-09 16:26:57,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:57,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:57,345 INFO L87 Difference]: Start difference. First operand 110854 states and 300223 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:58,270 INFO L93 Difference]: Finished difference Result 147009 states and 394083 transitions. [2021-07-09 16:26:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:26:58,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:26:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:58,600 INFO L225 Difference]: With dead ends: 147009 [2021-07-09 16:26:58,600 INFO L226 Difference]: Without dead ends: 147009 [2021-07-09 16:26:58,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=472, Invalid=1334, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147009 states. [2021-07-09 16:27:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147009 to 109394. [2021-07-09 16:27:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109394 states, 109392 states have (on average 2.707218078104432) internal successors, (296148), 109393 states have internal predecessors, (296148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109394 states to 109394 states and 296148 transitions. [2021-07-09 16:27:01,454 INFO L78 Accepts]: Start accepts. Automaton has 109394 states and 296148 transitions. Word has length 424 [2021-07-09 16:27:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:01,455 INFO L482 AbstractCegarLoop]: Abstraction has 109394 states and 296148 transitions. [2021-07-09 16:27:01,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 109394 states and 296148 transitions. [2021-07-09 16:27:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:27:02,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:02,054 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, 2, 2, 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 16:27:02,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 16:27:02,255 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -56750655, now seen corresponding path program 69 times [2021-07-09 16:27:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:02,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329538372] [2021-07-09 16:27:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329538372] [2021-07-09 16:27:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329538372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897558642] [2021-07-09 16:27:02,412 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 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 16:27:02,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:27:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:02,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:03,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897558642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:03,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:03,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:03,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12450648] [2021-07-09 16:27:03,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:03,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:03,401 INFO L87 Difference]: Start difference. First operand 109394 states and 296148 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:04,799 INFO L93 Difference]: Finished difference Result 190559 states and 513309 transitions. [2021-07-09 16:27:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:27:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:27:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:05,266 INFO L225 Difference]: With dead ends: 190559 [2021-07-09 16:27:05,267 INFO L226 Difference]: Without dead ends: 190559 [2021-07-09 16:27:05,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:27:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190559 states. [2021-07-09 16:27:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190559 to 112014. [2021-07-09 16:27:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112014 states, 112012 states have (on average 2.708433025033032) internal successors, (303377), 112013 states have internal predecessors, (303377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112014 states to 112014 states and 303377 transitions. [2021-07-09 16:27:08,851 INFO L78 Accepts]: Start accepts. Automaton has 112014 states and 303377 transitions. Word has length 424 [2021-07-09 16:27:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:08,852 INFO L482 AbstractCegarLoop]: Abstraction has 112014 states and 303377 transitions. [2021-07-09 16:27:08,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 112014 states and 303377 transitions. [2021-07-09 16:27:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:27:09,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:09,065 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, 2, 2, 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 16:27:09,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 16:27:09,268 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -413716253, now seen corresponding path program 70 times [2021-07-09 16:27:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:09,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417921095] [2021-07-09 16:27:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:09,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417921095] [2021-07-09 16:27:09,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417921095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131342681] [2021-07-09 16:27:09,430 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 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 16:27:09,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:27:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:10,017 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:27:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:10,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131342681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:10,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:10,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:10,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675748221] [2021-07-09 16:27:10,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:10,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:10,343 INFO L87 Difference]: Start difference. First operand 112014 states and 303377 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:11,316 INFO L93 Difference]: Finished difference Result 146514 states and 392810 transitions. [2021-07-09 16:27:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:27:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:27:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:11,689 INFO L225 Difference]: With dead ends: 146514 [2021-07-09 16:27:11,689 INFO L226 Difference]: Without dead ends: 146514 [2021-07-09 16:27:11,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:27:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2021-07-09 16:27:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 113274. [2021-07-09 16:27:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113274 states, 113272 states have (on average 2.7087541493043292) internal successors, (306826), 113273 states have internal predecessors, (306826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113274 states to 113274 states and 306826 transitions. [2021-07-09 16:27:14,636 INFO L78 Accepts]: Start accepts. Automaton has 113274 states and 306826 transitions. Word has length 424 [2021-07-09 16:27:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 113274 states and 306826 transitions. [2021-07-09 16:27:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 113274 states and 306826 transitions. [2021-07-09 16:27:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:27:15,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:15,259 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, 2, 2, 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 16:27:15,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:15,460 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1254886621, now seen corresponding path program 71 times [2021-07-09 16:27:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:15,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14210637] [2021-07-09 16:27:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:15,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14210637] [2021-07-09 16:27:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14210637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369337874] [2021-07-09 16:27:15,616 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 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 16:27:15,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:27:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:27:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369337874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:16,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:16,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:27:16,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132051755] [2021-07-09 16:27:16,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:27:16,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:16,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:27:16,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:27:16,411 INFO L87 Difference]: Start difference. First operand 113274 states and 306826 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:17,529 INFO L93 Difference]: Finished difference Result 144324 states and 386976 transitions. [2021-07-09 16:27:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:27:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 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 424 [2021-07-09 16:27:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:18,134 INFO L225 Difference]: With dead ends: 144324 [2021-07-09 16:27:18,134 INFO L226 Difference]: Without dead ends: 144324 [2021-07-09 16:27:18,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:27:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144324 states. [2021-07-09 16:27:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144324 to 115214. [2021-07-09 16:27:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115214 states, 115212 states have (on average 2.709483387147172) internal successors, (312165), 115213 states have internal predecessors, (312165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115214 states to 115214 states and 312165 transitions. [2021-07-09 16:27:21,774 INFO L78 Accepts]: Start accepts. Automaton has 115214 states and 312165 transitions. Word has length 424 [2021-07-09 16:27:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:21,775 INFO L482 AbstractCegarLoop]: Abstraction has 115214 states and 312165 transitions. [2021-07-09 16:27:21,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 115214 states and 312165 transitions. [2021-07-09 16:27:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-07-09 16:27:22,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:22,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:22,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 16:27:22,477 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1370718820, now seen corresponding path program 11 times [2021-07-09 16:27:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:22,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315645824] [2021-07-09 16:27:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:27:22,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315645824] [2021-07-09 16:27:22,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315645824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308822854] [2021-07-09 16:27:22,804 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 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 16:27:23,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 16:27:23,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:27:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308822854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:24,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 16:27:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356167647] [2021-07-09 16:27:24,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:27:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:27:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:27:24,008 INFO L87 Difference]: Start difference. First operand 115214 states and 312165 transitions. Second operand has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:25,057 INFO L93 Difference]: Finished difference Result 127423 states and 343370 transitions. [2021-07-09 16:27:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:27:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 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 428 [2021-07-09 16:27:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:25,356 INFO L225 Difference]: With dead ends: 127423 [2021-07-09 16:27:25,356 INFO L226 Difference]: Without dead ends: 127423 [2021-07-09 16:27:25,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=841, Invalid=1709, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 16:27:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2021-07-09 16:27:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 117696. [2021-07-09 16:27:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-09 16:27:28,133 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 428 [2021-07-09 16:27:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:28,133 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-09 16:27:28,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-09 16:27:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:28,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:28,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:28,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:28,556 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1307848988, now seen corresponding path program 35 times [2021-07-09 16:27:28,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:28,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704811922] [2021-07-09 16:27:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1669 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:27:29,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704811922] [2021-07-09 16:27:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704811922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690293760] [2021-07-09 16:27:29,158 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 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 16:27:29,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:27:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:29,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690293760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:29,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:29,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-09 16:27:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761799948] [2021-07-09 16:27:29,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:29,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:29,998 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:30,975 INFO L93 Difference]: Finished difference Result 134006 states and 360130 transitions. [2021-07-09 16:27:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:27:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:27:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:31,461 INFO L225 Difference]: With dead ends: 134006 [2021-07-09 16:27:31,461 INFO L226 Difference]: Without dead ends: 134006 [2021-07-09 16:27:31,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:27:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134006 states. [2021-07-09 16:27:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134006 to 118376. [2021-07-09 16:27:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118376 states, 118374 states have (on average 2.707984861540541) internal successors, (320555), 118375 states have internal predecessors, (320555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118376 states to 118376 states and 320555 transitions. [2021-07-09 16:27:34,198 INFO L78 Accepts]: Start accepts. Automaton has 118376 states and 320555 transitions. Word has length 429 [2021-07-09 16:27:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:34,199 INFO L482 AbstractCegarLoop]: Abstraction has 118376 states and 320555 transitions. [2021-07-09 16:27:34,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 118376 states and 320555 transitions. [2021-07-09 16:27:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:34,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:34,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:35,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:35,044 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1701005510, now seen corresponding path program 36 times [2021-07-09 16:27:35,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:35,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764718839] [2021-07-09 16:27:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:35,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:35,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764718839] [2021-07-09 16:27:35,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764718839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:35,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460408588] [2021-07-09 16:27:35,236 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 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 16:27:35,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:27:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460408588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:36,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:36,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777964284] [2021-07-09 16:27:36,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:36,453 INFO L87 Difference]: Start difference. First operand 118376 states and 320555 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:37,519 INFO L93 Difference]: Finished difference Result 141701 states and 379687 transitions. [2021-07-09 16:27:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:27:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:27:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:37,840 INFO L225 Difference]: With dead ends: 141701 [2021-07-09 16:27:37,840 INFO L226 Difference]: Without dead ends: 141701 [2021-07-09 16:27:37,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:27:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141701 states. [2021-07-09 16:27:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141701 to 117696. [2021-07-09 16:27:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-09 16:27:40,806 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 429 [2021-07-09 16:27:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:40,807 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-09 16:27:40,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-09 16:27:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:41,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:41,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:41,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-09 16:27:41,272 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2095438632, now seen corresponding path program 37 times [2021-07-09 16:27:41,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:41,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760992897] [2021-07-09 16:27:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:41,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760992897] [2021-07-09 16:27:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760992897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658515429] [2021-07-09 16:27:41,809 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 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 16:27:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:42,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658515429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:42,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:42,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:42,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830807548] [2021-07-09 16:27:42,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:42,385 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:43,358 INFO L93 Difference]: Finished difference Result 143841 states and 386037 transitions. [2021-07-09 16:27:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:27:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:27:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:43,881 INFO L225 Difference]: With dead ends: 143841 [2021-07-09 16:27:43,881 INFO L226 Difference]: Without dead ends: 143841 [2021-07-09 16:27:43,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=639, Invalid=1523, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:27:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143841 states. [2021-07-09 16:27:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143841 to 117016. [2021-07-09 16:27:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117016 states, 117014 states have (on average 2.707154699437674) internal successors, (316775), 117015 states have internal predecessors, (316775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117016 states to 117016 states and 316775 transitions. [2021-07-09 16:27:46,965 INFO L78 Accepts]: Start accepts. Automaton has 117016 states and 316775 transitions. Word has length 429 [2021-07-09 16:27:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:46,966 INFO L482 AbstractCegarLoop]: Abstraction has 117016 states and 316775 transitions. [2021-07-09 16:27:46,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 117016 states and 316775 transitions. [2021-07-09 16:27:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:47,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:47,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:47,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:47,400 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1753327114, now seen corresponding path program 38 times [2021-07-09 16:27:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:47,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323583054] [2021-07-09 16:27:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:47,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:47,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323583054] [2021-07-09 16:27:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323583054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:47,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309885389] [2021-07-09 16:27:47,594 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 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 16:27:47,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:27:47,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309885389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:48,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:48,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:48,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80764207] [2021-07-09 16:27:48,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:48,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:48,442 INFO L87 Difference]: Start difference. First operand 117016 states and 316775 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:49,531 INFO L93 Difference]: Finished difference Result 148126 states and 396802 transitions. [2021-07-09 16:27:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:27:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:27:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:49,881 INFO L225 Difference]: With dead ends: 148126 [2021-07-09 16:27:49,881 INFO L226 Difference]: Without dead ends: 148126 [2021-07-09 16:27:49,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=651, Invalid=1605, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:27:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148126 states. [2021-07-09 16:27:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148126 to 115656. [2021-07-09 16:27:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115656 states, 115654 states have (on average 2.706305013229114) internal successors, (312995), 115655 states have internal predecessors, (312995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 312995 transitions. [2021-07-09 16:27:52,717 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 312995 transitions. Word has length 429 [2021-07-09 16:27:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 115656 states and 312995 transitions. [2021-07-09 16:27:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 312995 transitions. [2021-07-09 16:27:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:53,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:53,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:53,688 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1571604844, now seen corresponding path program 39 times [2021-07-09 16:27:53,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:53,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442080359] [2021-07-09 16:27:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:53,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:53,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442080359] [2021-07-09 16:27:53,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442080359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:53,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302342871] [2021-07-09 16:27:53,906 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 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 16:27:54,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 16:27:54,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:54,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302342871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:54,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:54,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435354312] [2021-07-09 16:27:54,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:54,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:54,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:54,764 INFO L87 Difference]: Start difference. First operand 115656 states and 312995 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:55,973 INFO L93 Difference]: Finished difference Result 152051 states and 406986 transitions. [2021-07-09 16:27:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 16:27:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:27:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:56,353 INFO L225 Difference]: With dead ends: 152051 [2021-07-09 16:27:56,354 INFO L226 Difference]: Without dead ends: 152051 [2021-07-09 16:27:56,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:27:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152051 states. [2021-07-09 16:27:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152051 to 116236. [2021-07-09 16:27:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116236 states, 116234 states have (on average 2.7062133282860437) internal successors, (314554), 116235 states have internal predecessors, (314554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116236 states to 116236 states and 314554 transitions. [2021-07-09 16:27:59,296 INFO L78 Accepts]: Start accepts. Automaton has 116236 states and 314554 transitions. Word has length 429 [2021-07-09 16:27:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:59,297 INFO L482 AbstractCegarLoop]: Abstraction has 116236 states and 314554 transitions. [2021-07-09 16:27:59,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 116236 states and 314554 transitions. [2021-07-09 16:27:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:59,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:59,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:27:59,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 16:27:59,719 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash -962946382, now seen corresponding path program 40 times [2021-07-09 16:27:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:59,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466541285] [2021-07-09 16:27:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:00,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466541285] [2021-07-09 16:28:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466541285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809185406] [2021-07-09 16:28:00,263 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 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 16:28:00,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:28:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809185406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:01,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:01,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:28:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788593470] [2021-07-09 16:28:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:28:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:28:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:28:01,245 INFO L87 Difference]: Start difference. First operand 116236 states and 314554 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:02,310 INFO L93 Difference]: Finished difference Result 153516 states and 410830 transitions. [2021-07-09 16:28:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:28:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:28:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:02,874 INFO L225 Difference]: With dead ends: 153516 [2021-07-09 16:28:02,874 INFO L226 Difference]: Without dead ends: 153516 [2021-07-09 16:28:02,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=675, Invalid=1775, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 16:28:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153516 states. [2021-07-09 16:28:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153516 to 114976. [2021-07-09 16:28:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114976 states, 114974 states have (on average 2.7058726320733384) internal successors, (311105), 114975 states have internal predecessors, (311105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114976 states to 114976 states and 311105 transitions. [2021-07-09 16:28:06,092 INFO L78 Accepts]: Start accepts. Automaton has 114976 states and 311105 transitions. Word has length 429 [2021-07-09 16:28:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:06,092 INFO L482 AbstractCegarLoop]: Abstraction has 114976 states and 311105 transitions. [2021-07-09 16:28:06,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 114976 states and 311105 transitions. [2021-07-09 16:28:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:28:06,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:06,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:28:06,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:06,510 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash 500065872, now seen corresponding path program 41 times [2021-07-09 16:28:06,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:06,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824228742] [2021-07-09 16:28:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:06,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824228742] [2021-07-09 16:28:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824228742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438106537] [2021-07-09 16:28:06,701 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 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 16:28:07,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:28:07,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:07,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438106537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:07,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:07,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:28:07,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125877934] [2021-07-09 16:28:07,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:28:07,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:07,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:28:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:28:07,809 INFO L87 Difference]: Start difference. First operand 114976 states and 311105 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:08,846 INFO L93 Difference]: Finished difference Result 152841 states and 409174 transitions. [2021-07-09 16:28:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:28:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:28:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:09,243 INFO L225 Difference]: With dead ends: 152841 [2021-07-09 16:28:09,244 INFO L226 Difference]: Without dead ends: 152841 [2021-07-09 16:28:09,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 16:28:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152841 states. [2021-07-09 16:28:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152841 to 113716. [2021-07-09 16:28:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-09 16:28:12,203 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-09 16:28:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:12,204 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-09 16:28:12,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-09 16:28:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:28:12,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:12,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:28:13,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 16:28:13,052 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -706709138, now seen corresponding path program 42 times [2021-07-09 16:28:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:13,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813286922] [2021-07-09 16:28:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:13,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:13,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813286922] [2021-07-09 16:28:13,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813286922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:13,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952395729] [2021-07-09 16:28:13,243 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 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 16:28:13,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:28:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:14,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952395729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:14,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:14,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:28:14,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068207967] [2021-07-09 16:28:14,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:28:14,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:28:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:28:14,135 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:15,465 INFO L93 Difference]: Finished difference Result 147066 states and 393838 transitions. [2021-07-09 16:28:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 16:28:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:28:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:15,820 INFO L225 Difference]: With dead ends: 147066 [2021-07-09 16:28:15,820 INFO L226 Difference]: Without dead ends: 147066 [2021-07-09 16:28:15,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 16:28:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147066 states. [2021-07-09 16:28:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147066 to 113716. [2021-07-09 16:28:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-09 16:28:18,771 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-09 16:28:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:18,772 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-09 16:28:18,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-09 16:28:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:28:18,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:18,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:28:19,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:19,201 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -818236404, now seen corresponding path program 43 times [2021-07-09 16:28:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:19,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188006673] [2021-07-09 16:28:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:19,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:19,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188006673] [2021-07-09 16:28:19,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188006673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:19,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308501268] [2021-07-09 16:28:19,414 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 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 16:28:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:28:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:28:20,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308501268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:20,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:20,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:28:20,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721781025] [2021-07-09 16:28:20,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:28:20,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:28:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:28:20,289 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:21,322 INFO L93 Difference]: Finished difference Result 141826 states and 380190 transitions. [2021-07-09 16:28:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 16:28:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 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 429 [2021-07-09 16:28:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:21,637 INFO L225 Difference]: With dead ends: 141826 [2021-07-09 16:28:21,637 INFO L226 Difference]: Without dead ends: 141826 [2021-07-09 16:28:21,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:28:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141826 states. [2021-07-09 16:28:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141826 to 110996. [2021-07-09 16:28:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110996 states, 110994 states have (on average 2.7037137142548247) internal successors, (300096), 110995 states have internal predecessors, (300096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110996 states to 110996 states and 300096 transitions. [2021-07-09 16:28:24,462 INFO L78 Accepts]: Start accepts. Automaton has 110996 states and 300096 transitions. Word has length 429 [2021-07-09 16:28:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:24,462 INFO L482 AbstractCegarLoop]: Abstraction has 110996 states and 300096 transitions. [2021-07-09 16:28:24,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 110996 states and 300096 transitions. [2021-07-09 16:28:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-07-09 16:28:24,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:24,664 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, 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 16:28:24,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 16:28:24,873 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1983477794, now seen corresponding path program 72 times [2021-07-09 16:28:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:24,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075541594] [2021-07-09 16:28:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1124 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-07-09 16:28:25,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:25,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075541594] [2021-07-09 16:28:25,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075541594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:25,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397003711] [2021-07-09 16:28:25,454 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 16:28:25,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:28:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1101 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-07-09 16:28:26,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397003711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:26,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:26,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:28:26,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407040071] [2021-07-09 16:28:26,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:28:26,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:28:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:28:26,337 INFO L87 Difference]: Start difference. First operand 110996 states and 300096 transitions. Second operand has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:27,748 INFO L93 Difference]: Finished difference Result 202896 states and 543282 transitions. [2021-07-09 16:28:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:28:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 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 448 [2021-07-09 16:28:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:28,271 INFO L225 Difference]: With dead ends: 202896 [2021-07-09 16:28:28,271 INFO L226 Difference]: Without dead ends: 202896 [2021-07-09 16:28:28,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:28:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202896 states. [2021-07-09 16:28:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202896 to 136196. [2021-07-09 16:28:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136194 states have (on average 2.711250128493179) internal successors, (369256), 136195 states have internal predecessors, (369256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 369256 transitions. [2021-07-09 16:28:32,241 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 369256 transitions. Word has length 448 [2021-07-09 16:28:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 369256 transitions. [2021-07-09 16:28:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 369256 transitions. [2021-07-09 16:28:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:32,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:32,902 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, 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 16:28:33,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:33,102 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:33,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2099316009, now seen corresponding path program 73 times [2021-07-09 16:28:33,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:33,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940398682] [2021-07-09 16:28:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:33,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940398682] [2021-07-09 16:28:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940398682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267796606] [2021-07-09 16:28:33,270 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:33,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267796606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:33,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:33,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451199475] [2021-07-09 16:28:33,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:33,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:33,862 INFO L87 Difference]: Start difference. First operand 136196 states and 369256 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:35,201 INFO L93 Difference]: Finished difference Result 191246 states and 514845 transitions. [2021-07-09 16:28:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:28:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:28:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:35,676 INFO L225 Difference]: With dead ends: 191246 [2021-07-09 16:28:35,676 INFO L226 Difference]: Without dead ends: 191246 [2021-07-09 16:28:35,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:28:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191246 states. [2021-07-09 16:28:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191246 to 138816. [2021-07-09 16:28:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138816 states, 138814 states have (on average 2.7121543936490555) internal successors, (376485), 138815 states have internal predecessors, (376485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138816 states to 138816 states and 376485 transitions. [2021-07-09 16:28:39,498 INFO L78 Accepts]: Start accepts. Automaton has 138816 states and 376485 transitions. Word has length 453 [2021-07-09 16:28:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:39,499 INFO L482 AbstractCegarLoop]: Abstraction has 138816 states and 376485 transitions. [2021-07-09 16:28:39,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 138816 states and 376485 transitions. [2021-07-09 16:28:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:40,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:40,192 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, 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 16:28:40,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 16:28:40,404 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1632211019, now seen corresponding path program 74 times [2021-07-09 16:28:40,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:40,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716768969] [2021-07-09 16:28:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:40,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716768969] [2021-07-09 16:28:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716768969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028530720] [2021-07-09 16:28:40,574 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:40,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:28:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:40,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:41,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028530720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:41,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:41,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:41,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443235960] [2021-07-09 16:28:41,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:41,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:41,165 INFO L87 Difference]: Start difference. First operand 138816 states and 376485 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:42,615 INFO L93 Difference]: Finished difference Result 242711 states and 655917 transitions. [2021-07-09 16:28:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:28:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:43,511 INFO L225 Difference]: With dead ends: 242711 [2021-07-09 16:28:43,512 INFO L226 Difference]: Without dead ends: 242711 [2021-07-09 16:28:43,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242711 states. [2021-07-09 16:28:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242711 to 140176. [2021-07-09 16:28:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140176 states, 140174 states have (on average 2.7128069399460673) internal successors, (380265), 140175 states have internal predecessors, (380265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140176 states to 140176 states and 380265 transitions. [2021-07-09 16:28:47,419 INFO L78 Accepts]: Start accepts. Automaton has 140176 states and 380265 transitions. Word has length 453 [2021-07-09 16:28:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:47,420 INFO L482 AbstractCegarLoop]: Abstraction has 140176 states and 380265 transitions. [2021-07-09 16:28:47,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 140176 states and 380265 transitions. [2021-07-09 16:28:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:48,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:48,083 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, 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 16:28:48,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:48,284 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1989176617, now seen corresponding path program 75 times [2021-07-09 16:28:48,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:48,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990410751] [2021-07-09 16:28:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:48,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990410751] [2021-07-09 16:28:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990410751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380383513] [2021-07-09 16:28:48,464 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:48,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:28:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:48,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380383513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:49,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:49,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597797245] [2021-07-09 16:28:49,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:49,386 INFO L87 Difference]: Start difference. First operand 140176 states and 380265 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:50,682 INFO L93 Difference]: Finished difference Result 195006 states and 525329 transitions. [2021-07-09 16:28:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:28:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:51,174 INFO L225 Difference]: With dead ends: 195006 [2021-07-09 16:28:51,174 INFO L226 Difference]: Without dead ends: 195006 [2021-07-09 16:28:51,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195006 states. [2021-07-09 16:28:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195006 to 141436. [2021-07-09 16:28:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141436 states, 141434 states have (on average 2.71302515661015) internal successors, (383714), 141435 states have internal predecessors, (383714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141436 states to 141436 states and 383714 transitions. [2021-07-09 16:28:54,787 INFO L78 Accepts]: Start accepts. Automaton has 141436 states and 383714 transitions. Word has length 453 [2021-07-09 16:28:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:54,788 INFO L482 AbstractCegarLoop]: Abstraction has 141436 states and 383714 transitions. [2021-07-09 16:28:54,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 141436 states and 383714 transitions. [2021-07-09 16:28:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:55,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:55,457 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, 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 16:28:55,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:55,666 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1806118163, now seen corresponding path program 76 times [2021-07-09 16:28:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:55,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910853360] [2021-07-09 16:28:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:55,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:55,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910853360] [2021-07-09 16:28:55,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910853360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:55,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635170798] [2021-07-09 16:28:55,832 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:56,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:28:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:56,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635170798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:56,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:56,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:56,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859092023] [2021-07-09 16:28:56,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:56,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:56,799 INFO L87 Difference]: Start difference. First operand 141436 states and 383714 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:58,248 INFO L93 Difference]: Finished difference Result 237521 states and 641183 transitions. [2021-07-09 16:28:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:28:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:58,856 INFO L225 Difference]: With dead ends: 237521 [2021-07-09 16:28:58,856 INFO L226 Difference]: Without dead ends: 237521 [2021-07-09 16:28:58,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237521 states. [2021-07-09 16:29:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237521 to 143476. [2021-07-09 16:29:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-09 16:29:03,900 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-09 16:29:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:03,900 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-09 16:29:03,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-09 16:29:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:04,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:04,202 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, 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 16:29:04,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:04,417 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1449152565, now seen corresponding path program 77 times [2021-07-09 16:29:04,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:04,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643902475] [2021-07-09 16:29:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:04,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643902475] [2021-07-09 16:29:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643902475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013993598] [2021-07-09 16:29:04,584 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:05,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:29:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:05,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013993598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:05,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:05,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016331097] [2021-07-09 16:29:05,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:05,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:05,778 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:07,410 INFO L93 Difference]: Finished difference Result 244576 states and 661325 transitions. [2021-07-09 16:29:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:07,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:08,076 INFO L225 Difference]: With dead ends: 244576 [2021-07-09 16:29:08,076 INFO L226 Difference]: Without dead ends: 244576 [2021-07-09 16:29:08,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244576 states. [2021-07-09 16:29:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244576 to 143476. [2021-07-09 16:29:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-09 16:29:12,474 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-09 16:29:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:12,475 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-09 16:29:12,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-09 16:29:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:12,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:12,758 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, 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 16:29:12,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 16:29:12,970 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:12,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1646646569, now seen corresponding path program 78 times [2021-07-09 16:29:12,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:12,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938899664] [2021-07-09 16:29:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:13,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938899664] [2021-07-09 16:29:13,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938899664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497730620] [2021-07-09 16:29:13,138 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:13,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:29:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:13,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497730620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:14,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589013699] [2021-07-09 16:29:14,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:14,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:14,257 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:15,410 INFO L93 Difference]: Finished difference Result 196156 states and 527597 transitions. [2021-07-09 16:29:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:15,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:16,128 INFO L225 Difference]: With dead ends: 196156 [2021-07-09 16:29:16,128 INFO L226 Difference]: Without dead ends: 196156 [2021-07-09 16:29:16,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196156 states. [2021-07-09 16:29:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196156 to 144636. [2021-07-09 16:29:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144636 states, 144634 states have (on average 2.714009154140797) internal successors, (392538), 144635 states have internal predecessors, (392538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144636 states to 144636 states and 392538 transitions. [2021-07-09 16:29:20,128 INFO L78 Accepts]: Start accepts. Automaton has 144636 states and 392538 transitions. Word has length 453 [2021-07-09 16:29:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:20,128 INFO L482 AbstractCegarLoop]: Abstraction has 144636 states and 392538 transitions. [2021-07-09 16:29:20,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 144636 states and 392538 transitions. [2021-07-09 16:29:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:20,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:20,416 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, 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 16:29:20,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 16:29:20,616 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -977333519, now seen corresponding path program 79 times [2021-07-09 16:29:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:20,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550199995] [2021-07-09 16:29:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:20,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:20,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550199995] [2021-07-09 16:29:20,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550199995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:20,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59555346] [2021-07-09 16:29:20,789 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:21,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59555346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:21,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:21,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:21,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121826770] [2021-07-09 16:29:21,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:21,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:21,662 INFO L87 Difference]: Start difference. First operand 144636 states and 392538 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:22,896 INFO L93 Difference]: Finished difference Result 209401 states and 563969 transitions. [2021-07-09 16:29:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:29:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:23,741 INFO L225 Difference]: With dead ends: 209401 [2021-07-09 16:29:23,741 INFO L226 Difference]: Without dead ends: 209401 [2021-07-09 16:29:23,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:29:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209401 states. [2021-07-09 16:29:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209401 to 146676. [2021-07-09 16:29:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146676 states, 146674 states have (on average 2.7149187995145696) internal successors, (398208), 146675 states have internal predecessors, (398208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146676 states to 146676 states and 398208 transitions. [2021-07-09 16:29:27,659 INFO L78 Accepts]: Start accepts. Automaton has 146676 states and 398208 transitions. Word has length 453 [2021-07-09 16:29:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:27,660 INFO L482 AbstractCegarLoop]: Abstraction has 146676 states and 398208 transitions. [2021-07-09 16:29:27,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 146676 states and 398208 transitions. [2021-07-09 16:29:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:27,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:27,959 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, 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 16:29:28,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 16:29:28,160 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1334299117, now seen corresponding path program 80 times [2021-07-09 16:29:28,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:28,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494274686] [2021-07-09 16:29:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:28,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:28,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494274686] [2021-07-09 16:29:28,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494274686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:28,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225607023] [2021-07-09 16:29:28,717 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:28,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:29:28,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225607023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:29,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:29,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:29,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433889799] [2021-07-09 16:29:29,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:29,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:29,305 INFO L87 Difference]: Start difference. First operand 146676 states and 398208 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:30,823 INFO L93 Difference]: Finished difference Result 218806 states and 590153 transitions. [2021-07-09 16:29:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:30,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:31,739 INFO L225 Difference]: With dead ends: 218806 [2021-07-09 16:29:31,739 INFO L226 Difference]: Without dead ends: 218806 [2021-07-09 16:29:31,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:29:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218806 states. [2021-07-09 16:29:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218806 to 145996. [2021-07-09 16:29:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145996 states, 145994 states have (on average 2.7146184089757113) internal successors, (396318), 145995 states have internal predecessors, (396318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145996 states to 145996 states and 396318 transitions. [2021-07-09 16:29:35,666 INFO L78 Accepts]: Start accepts. Automaton has 145996 states and 396318 transitions. Word has length 453 [2021-07-09 16:29:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:35,666 INFO L482 AbstractCegarLoop]: Abstraction has 145996 states and 396318 transitions. [2021-07-09 16:29:35,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 145996 states and 396318 transitions. [2021-07-09 16:29:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:36,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:36,398 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, 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 16:29:36,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 16:29:36,599 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash -135130955, now seen corresponding path program 81 times [2021-07-09 16:29:36,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:36,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039473239] [2021-07-09 16:29:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:36,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:36,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039473239] [2021-07-09 16:29:36,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039473239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:36,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656805126] [2021-07-09 16:29:36,775 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:37,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:29:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:37,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:37,682 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:29:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:37,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656805126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:37,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:37,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:37,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891632882] [2021-07-09 16:29:37,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:37,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:37,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:37,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:37,767 INFO L87 Difference]: Start difference. First operand 145996 states and 396318 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:39,028 INFO L93 Difference]: Finished difference Result 216356 states and 582998 transitions. [2021-07-09 16:29:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:39,907 INFO L225 Difference]: With dead ends: 216356 [2021-07-09 16:29:39,907 INFO L226 Difference]: Without dead ends: 216356 [2021-07-09 16:29:39,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216356 states. [2021-07-09 16:29:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216356 to 145996. [2021-07-09 16:29:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145996 states, 145994 states have (on average 2.7146184089757113) internal successors, (396318), 145995 states have internal predecessors, (396318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145996 states to 145996 states and 396318 transitions. [2021-07-09 16:29:43,930 INFO L78 Accepts]: Start accepts. Automaton has 145996 states and 396318 transitions. Word has length 453 [2021-07-09 16:29:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:43,931 INFO L482 AbstractCegarLoop]: Abstraction has 145996 states and 396318 transitions. [2021-07-09 16:29:43,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145996 states and 396318 transitions. [2021-07-09 16:29:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:44,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:44,193 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, 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 16:29:44,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 16:29:44,394 INFO L430 AbstractCegarLoop]: === Iteration 139 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash -912342313, now seen corresponding path program 82 times [2021-07-09 16:29:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893490389] [2021-07-09 16:29:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:44,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:44,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893490389] [2021-07-09 16:29:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893490389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:44,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175503376] [2021-07-09 16:29:44,567 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:45,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:29:45,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:45,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175503376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:45,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:45,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900485131] [2021-07-09 16:29:45,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:45,522 INFO L87 Difference]: Start difference. First operand 145996 states and 396318 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:46,565 INFO L93 Difference]: Finished difference Result 181801 states and 487363 transitions. [2021-07-09 16:29:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:46,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:47,207 INFO L225 Difference]: With dead ends: 181801 [2021-07-09 16:29:47,208 INFO L226 Difference]: Without dead ends: 181801 [2021-07-09 16:29:47,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181801 states. [2021-07-09 16:29:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181801 to 141636. [2021-07-09 16:29:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141636 states, 141634 states have (on average 2.7138681390061707) internal successors, (384376), 141635 states have internal predecessors, (384376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384376 transitions. [2021-07-09 16:29:51,155 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384376 transitions. Word has length 453 [2021-07-09 16:29:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:51,156 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384376 transitions. [2021-07-09 16:29:51,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384376 transitions. [2021-07-09 16:29:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:51,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:51,424 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, 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 16:29:51,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:51,637 INFO L430 AbstractCegarLoop]: === Iteration 140 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1489521333, now seen corresponding path program 83 times [2021-07-09 16:29:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567543390] [2021-07-09 16:29:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:51,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:51,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567543390] [2021-07-09 16:29:51,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567543390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:51,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831904098] [2021-07-09 16:29:51,791 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:52,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:29:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:52,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831904098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:52,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:52,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:29:52,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754076486] [2021-07-09 16:29:52,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:52,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:52,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:52,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:52,775 INFO L87 Difference]: Start difference. First operand 141636 states and 384376 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:53,989 INFO L93 Difference]: Finished difference Result 212026 states and 571962 transitions. [2021-07-09 16:29:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:29:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:54,842 INFO L225 Difference]: With dead ends: 212026 [2021-07-09 16:29:54,843 INFO L226 Difference]: Without dead ends: 212026 [2021-07-09 16:29:54,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:29:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212026 states. [2021-07-09 16:29:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212026 to 143576. [2021-07-09 16:29:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143576 states, 143574 states have (on average 2.7143842199841197) internal successors, (389715), 143575 states have internal predecessors, (389715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143576 states to 143576 states and 389715 transitions. [2021-07-09 16:29:59,458 INFO L78 Accepts]: Start accepts. Automaton has 143576 states and 389715 transitions. Word has length 453 [2021-07-09 16:29:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:59,458 INFO L482 AbstractCegarLoop]: Abstraction has 143576 states and 389715 transitions. [2021-07-09 16:29:59,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 143576 states and 389715 transitions. [2021-07-09 16:29:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:59,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:59,753 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, 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 16:29:59,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 16:29:59,957 INFO L430 AbstractCegarLoop]: === Iteration 141 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1956626323, now seen corresponding path program 84 times [2021-07-09 16:29:59,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:59,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771287347] [2021-07-09 16:29:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771287347] [2021-07-09 16:30:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771287347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162501166] [2021-07-09 16:30:00,117 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:00,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:30:00,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162501166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:01,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:01,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331460079] [2021-07-09 16:30:01,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:01,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:01,438 INFO L87 Difference]: Start difference. First operand 143576 states and 389715 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:03,258 INFO L93 Difference]: Finished difference Result 263681 states and 713456 transitions. [2021-07-09 16:30:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:30:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:04,467 INFO L225 Difference]: With dead ends: 263681 [2021-07-09 16:30:04,467 INFO L226 Difference]: Without dead ends: 263681 [2021-07-09 16:30:04,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:30:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263681 states. [2021-07-09 16:30:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263681 to 146876. [2021-07-09 16:30:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146876 states, 146874 states have (on average 2.715484020316734) internal successors, (398834), 146875 states have internal predecessors, (398834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146876 states to 146876 states and 398834 transitions. [2021-07-09 16:30:09,547 INFO L78 Accepts]: Start accepts. Automaton has 146876 states and 398834 transitions. Word has length 453 [2021-07-09 16:30:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:09,548 INFO L482 AbstractCegarLoop]: Abstraction has 146876 states and 398834 transitions. [2021-07-09 16:30:09,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 146876 states and 398834 transitions. [2021-07-09 16:30:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:09,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:09,897 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, 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 16:30:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:10,098 INFO L430 AbstractCegarLoop]: === Iteration 142 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1599660725, now seen corresponding path program 85 times [2021-07-09 16:30:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504587809] [2021-07-09 16:30:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:10,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:10,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504587809] [2021-07-09 16:30:10,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504587809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:10,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785200645] [2021-07-09 16:30:10,266 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785200645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:11,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:11,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:11,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833512196] [2021-07-09 16:30:11,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:11,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:11,085 INFO L87 Difference]: Start difference. First operand 146876 states and 398834 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:12,335 INFO L93 Difference]: Finished difference Result 215866 states and 582277 transitions. [2021-07-09 16:30:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:30:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:13,248 INFO L225 Difference]: With dead ends: 215866 [2021-07-09 16:30:13,248 INFO L226 Difference]: Without dead ends: 215866 [2021-07-09 16:30:13,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:30:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215866 states. [2021-07-09 16:30:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215866 to 147936. [2021-07-09 16:30:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147936 states, 147934 states have (on average 2.715109440696527) internal successors, (401657), 147935 states have internal predecessors, (401657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147936 states to 147936 states and 401657 transitions. [2021-07-09 16:30:17,289 INFO L78 Accepts]: Start accepts. Automaton has 147936 states and 401657 transitions. Word has length 453 [2021-07-09 16:30:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:17,289 INFO L482 AbstractCegarLoop]: Abstraction has 147936 states and 401657 transitions. [2021-07-09 16:30:17,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 147936 states and 401657 transitions. [2021-07-09 16:30:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:17,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:17,597 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, 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 16:30:17,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:17,798 INFO L430 AbstractCegarLoop]: === Iteration 143 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1099988209, now seen corresponding path program 86 times [2021-07-09 16:30:17,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303990167] [2021-07-09 16:30:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:18,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:18,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303990167] [2021-07-09 16:30:18,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303990167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:18,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361043084] [2021-07-09 16:30:18,380 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:18,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:30:18,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361043084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:19,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:19,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:19,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100039125] [2021-07-09 16:30:19,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:19,010 INFO L87 Difference]: Start difference. First operand 147936 states and 401657 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:20,463 INFO L93 Difference]: Finished difference Result 227096 states and 612763 transitions. [2021-07-09 16:30:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:30:20,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:21,083 INFO L225 Difference]: With dead ends: 227096 [2021-07-09 16:30:21,084 INFO L226 Difference]: Without dead ends: 227096 [2021-07-09 16:30:21,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:30:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227096 states. [2021-07-09 16:30:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227096 to 153076. [2021-07-09 16:30:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153076 states, 153074 states have (on average 2.7164639324771027) internal successors, (415820), 153075 states have internal predecessors, (415820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153076 states to 153076 states and 415820 transitions. [2021-07-09 16:30:25,623 INFO L78 Accepts]: Start accepts. Automaton has 153076 states and 415820 transitions. Word has length 453 [2021-07-09 16:30:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:25,624 INFO L482 AbstractCegarLoop]: Abstraction has 153076 states and 415820 transitions. [2021-07-09 16:30:25,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 153076 states and 415820 transitions. [2021-07-09 16:30:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:25,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:25,907 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, 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 16:30:26,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:26,107 INFO L430 AbstractCegarLoop]: === Iteration 144 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash 743022611, now seen corresponding path program 87 times [2021-07-09 16:30:26,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:26,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184819100] [2021-07-09 16:30:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:26,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184819100] [2021-07-09 16:30:26,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184819100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358024220] [2021-07-09 16:30:26,264 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:27,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:30:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:27,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358024220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:27,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:27,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465619790] [2021-07-09 16:30:27,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:27,639 INFO L87 Difference]: Start difference. First operand 153076 states and 415820 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:29,207 INFO L93 Difference]: Finished difference Result 237026 states and 640282 transitions. [2021-07-09 16:30:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:30:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:29,871 INFO L225 Difference]: With dead ends: 237026 [2021-07-09 16:30:29,871 INFO L226 Difference]: Without dead ends: 237026 [2021-07-09 16:30:29,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:30:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237026 states. [2021-07-09 16:30:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237026 to 151036. [2021-07-09 16:30:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151036 states, 151034 states have (on average 2.7156137028748493) internal successors, (410150), 151035 states have internal predecessors, (410150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151036 states to 151036 states and 410150 transitions. [2021-07-09 16:30:34,666 INFO L78 Accepts]: Start accepts. Automaton has 151036 states and 410150 transitions. Word has length 453 [2021-07-09 16:30:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:34,666 INFO L482 AbstractCegarLoop]: Abstraction has 151036 states and 410150 transitions. [2021-07-09 16:30:34,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 151036 states and 410150 transitions. [2021-07-09 16:30:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:34,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:34,971 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, 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 16:30:35,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:35,171 INFO L430 AbstractCegarLoop]: === Iteration 145 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1942190773, now seen corresponding path program 88 times [2021-07-09 16:30:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:35,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739358194] [2021-07-09 16:30:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:35,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739358194] [2021-07-09 16:30:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739358194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48087621] [2021-07-09 16:30:35,344 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:36,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:30:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48087621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:36,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:36,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039690658] [2021-07-09 16:30:36,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:36,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:36,642 INFO L87 Difference]: Start difference. First operand 151036 states and 410150 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:38,060 INFO L93 Difference]: Finished difference Result 194436 states and 522089 transitions. [2021-07-09 16:30:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:30:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:38,905 INFO L225 Difference]: With dead ends: 194436 [2021-07-09 16:30:38,906 INFO L226 Difference]: Without dead ends: 194436 [2021-07-09 16:30:38,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:30:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194436 states. [2021-07-09 16:30:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194436 to 147156. [2021-07-09 16:30:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147156 states, 147154 states have (on average 2.714652676787583) internal successors, (399472), 147155 states have internal predecessors, (399472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147156 states to 147156 states and 399472 transitions. [2021-07-09 16:30:43,047 INFO L78 Accepts]: Start accepts. Automaton has 147156 states and 399472 transitions. Word has length 453 [2021-07-09 16:30:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:43,048 INFO L482 AbstractCegarLoop]: Abstraction has 147156 states and 399472 transitions. [2021-07-09 16:30:43,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 147156 states and 399472 transitions. [2021-07-09 16:30:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:43,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:43,351 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, 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 16:30:43,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 16:30:43,551 INFO L430 AbstractCegarLoop]: === Iteration 146 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash 352645651, now seen corresponding path program 89 times [2021-07-09 16:30:43,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:43,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430872655] [2021-07-09 16:30:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:44,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:44,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430872655] [2021-07-09 16:30:44,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430872655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:44,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225083784] [2021-07-09 16:30:44,115 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:44,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:30:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225083784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:44,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771952687] [2021-07-09 16:30:44,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:44,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:44,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:44,895 INFO L87 Difference]: Start difference. First operand 147156 states and 399472 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:46,337 INFO L93 Difference]: Finished difference Result 226166 states and 611016 transitions. [2021-07-09 16:30:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:30:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:46,985 INFO L225 Difference]: With dead ends: 226166 [2021-07-09 16:30:46,986 INFO L226 Difference]: Without dead ends: 226166 [2021-07-09 16:30:46,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:30:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226166 states. [2021-07-09 16:30:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226166 to 148416. [2021-07-09 16:30:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148416 states, 148414 states have (on average 2.7148449607179916) internal successors, (402921), 148415 states have internal predecessors, (402921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148416 states to 148416 states and 402921 transitions. [2021-07-09 16:30:51,577 INFO L78 Accepts]: Start accepts. Automaton has 148416 states and 402921 transitions. Word has length 453 [2021-07-09 16:30:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:30:51,578 INFO L482 AbstractCegarLoop]: Abstraction has 148416 states and 402921 transitions. [2021-07-09 16:30:51,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 148416 states and 402921 transitions. [2021-07-09 16:30:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:30:51,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:30:51,859 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, 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 16:30:52,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 16:30:52,059 INFO L430 AbstractCegarLoop]: === Iteration 147 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:30:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:30:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 819750641, now seen corresponding path program 90 times [2021-07-09 16:30:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:30:52,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773982929] [2021-07-09 16:30:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:30:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:30:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:52,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:30:52,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773982929] [2021-07-09 16:30:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773982929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:52,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531007421] [2021-07-09 16:30:52,604 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:30:53,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:30:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:30:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:30:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:30:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:30:53,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531007421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:30:53,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:30:53,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:30:53,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473260242] [2021-07-09 16:30:53,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:30:53,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:30:53,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:30:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:30:53,455 INFO L87 Difference]: Start difference. First operand 148416 states and 402921 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:30:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:30:54,930 INFO L93 Difference]: Finished difference Result 237136 states and 641075 transitions. [2021-07-09 16:30:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:30:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:30:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:30:55,591 INFO L225 Difference]: With dead ends: 237136 [2021-07-09 16:30:55,591 INFO L226 Difference]: Without dead ends: 237136 [2021-07-09 16:30:55,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=400, Invalid=1240, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:30:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237136 states. [2021-07-09 16:30:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237136 to 151516. [2021-07-09 16:30:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151516 states, 151514 states have (on average 2.7153530366830787) internal successors, (411414), 151515 states have internal predecessors, (411414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151516 states to 151516 states and 411414 transitions. [2021-07-09 16:31:00,324 INFO L78 Accepts]: Start accepts. Automaton has 151516 states and 411414 transitions. Word has length 453 [2021-07-09 16:31:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:31:00,325 INFO L482 AbstractCegarLoop]: Abstraction has 151516 states and 411414 transitions. [2021-07-09 16:31:00,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 151516 states and 411414 transitions. [2021-07-09 16:31:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:31:00,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:31:00,610 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, 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 16:31:00,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 16:31:00,811 INFO L430 AbstractCegarLoop]: === Iteration 148 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:31:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:31:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash 462785043, now seen corresponding path program 91 times [2021-07-09 16:31:00,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:31:00,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667940768] [2021-07-09 16:31:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:31:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:31:01,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:31:01,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667940768] [2021-07-09 16:31:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667940768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:01,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315712571] [2021-07-09 16:31:01,366 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:01,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:31:01,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:31:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:31:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315712571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:02,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:31:02,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:31:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869021918] [2021-07-09 16:31:02,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:31:02,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:31:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:31:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:31:02,035 INFO L87 Difference]: Start difference. First operand 151516 states and 411414 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:31:03,166 INFO L93 Difference]: Finished difference Result 183831 states and 494281 transitions. [2021-07-09 16:31:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:31:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:31:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:31:03,925 INFO L225 Difference]: With dead ends: 183831 [2021-07-09 16:31:03,925 INFO L226 Difference]: Without dead ends: 183831 [2021-07-09 16:31:03,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:31:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183831 states. [2021-07-09 16:31:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183831 to 145896. [2021-07-09 16:31:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145896 states, 145894 states have (on average 2.7144570715725114) internal successors, (396023), 145895 states have internal predecessors, (396023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145896 states to 145896 states and 396023 transitions. [2021-07-09 16:31:07,844 INFO L78 Accepts]: Start accepts. Automaton has 145896 states and 396023 transitions. Word has length 453 [2021-07-09 16:31:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:31:07,844 INFO L482 AbstractCegarLoop]: Abstraction has 145896 states and 396023 transitions. [2021-07-09 16:31:07,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 145896 states and 396023 transitions. [2021-07-09 16:31:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:31:08,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:31:08,133 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, 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 16:31:08,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 16:31:08,334 INFO L430 AbstractCegarLoop]: === Iteration 149 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:31:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:31:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash 977457393, now seen corresponding path program 92 times [2021-07-09 16:31:08,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:31:08,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788057828] [2021-07-09 16:31:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:31:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:31:08,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:31:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788057828] [2021-07-09 16:31:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788057828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66435516] [2021-07-09 16:31:08,889 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:09,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:31:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:31:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:31:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:31:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:31:09,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66435516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:09,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:31:09,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:31:09,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036153568] [2021-07-09 16:31:09,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:31:09,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:31:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:31:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:31:09,497 INFO L87 Difference]: Start difference. First operand 145896 states and 396023 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:31:10,822 INFO L93 Difference]: Finished difference Result 196316 states and 527524 transitions. [2021-07-09 16:31:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:31:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 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 453 [2021-07-09 16:31:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:31:11,638 INFO L225 Difference]: With dead ends: 196316 [2021-07-09 16:31:11,638 INFO L226 Difference]: Without dead ends: 196316 [2021-07-09 16:31:11,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1309, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:31:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196316 states. [2021-07-09 16:31:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196316 to 157136. [2021-07-09 16:31:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157136 states, 157134 states have (on average 2.7164140160627235) internal successors, (426841), 157135 states have internal predecessors, (426841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-07-09 16:31:15,737 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 453 [2021-07-09 16:31:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:31:15,738 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-07-09 16:31:15,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:31:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-07-09 16:31:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-07-09 16:31:16,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:31:16,482 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, 2, 2, 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 16:31:16,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-09 16:31:16,682 INFO L430 AbstractCegarLoop]: === Iteration 150 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:31:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:31:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash -318467176, now seen corresponding path program 93 times [2021-07-09 16:31:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:31:16,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137239669] [2021-07-09 16:31:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:31:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:31:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:31:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:31:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137239669] [2021-07-09 16:31:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137239669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:31:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108150945] [2021-07-09 16:31:16,883 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:17,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 16:31:17,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:31:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:31:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-09 16:31:17,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:31:17,838 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:17,839 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-09 16:31:17,840 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 16:31:17,841 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:31:17,841 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:31:17,841 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:31:17,841 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:31:17,841 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:31:17,841 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:31:17,841 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:31:17,841 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:31:17,842 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:31:17,843 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:17,843 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-09 16:31:17,843 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:31:17,843 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:31:17,843 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:31:17,843 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:31:17,843 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:31:17,843 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:31:17,844 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:31:17,844 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:31:17,844 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-09 16:31:17,845 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:31:17,845 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:31:17,845 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-09 16:31:17,845 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:31:17,847 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 16:31:17,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:31:17 BasicIcfg [2021-07-09 16:31:17,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:31:17,847 INFO L168 Benchmark]: Toolchain (without parser) took 692218.70 ms. Allocated memory was 194.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 156.2 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 194.0 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.52 ms. Allocated memory is still 194.0 MB. Free memory was 156.1 MB in the beginning and 157.9 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 155.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: Boogie Preprocessor took 41.55 ms. Allocated memory is still 194.0 MB. Free memory was 155.3 MB in the beginning and 153.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: RCFGBuilder took 401.67 ms. Allocated memory is still 194.0 MB. Free memory was 153.2 MB in the beginning and 120.1 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 INFO L168 Benchmark]: TraceAbstraction took 691292.19 ms. Allocated memory was 194.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 119.6 MB in the beginning and 6.3 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-07-09 16:31:17,848 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 194.0 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 421.52 ms. Allocated memory is still 194.0 MB. Free memory was 156.1 MB in the beginning and 157.9 MB in the end (delta: -1.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 56.25 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 155.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.55 ms. Allocated memory is still 194.0 MB. Free memory was 155.3 MB in the beginning and 153.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 401.67 ms. Allocated memory is still 194.0 MB. Free memory was 153.2 MB in the beginning and 120.1 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 691292.19 ms. Allocated memory was 194.0 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 119.6 MB in the beginning and 6.3 GB in the end (delta: -6.2 GB). Peak memory consumption was 1.6 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 BasicCegarLoop was analyzing trace of length 459 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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 145 places, 150 transitions, 322 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 691180.0ms, OverallIterations: 150, TraceHistogramMax: 12, EmptinessCheckTime: 31665.2ms, AutomataDifference: 169030.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 189.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22333 SDtfs, 194086 SDslu, 192183 SDs, 0 SdLazy, 22453 SolverSat, 6415 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11423.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59876 GetRequests, 54746 SyntacticMatches, 2 SemanticMatches, 5128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41611 ImplicationChecksByTransitivity, 38505.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=157136occurred in iteration=149, InterpolantAutomatonStates: 4153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 312749.9ms AutomataMinimizationTime, 149 MinimizatonAttempts, 4960232 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5580.6ms SsaConstructionTime, 35174.2ms SatisfiabilityAnalysisTime, 97584.2ms InterpolantComputationTime, 108396 NumberOfCodeBlocks, 108231 NumberOfCodeBlocksAsserted, 891 NumberOfCheckSat, 108101 ConstructedInterpolants, 0 QuantifiedInterpolants, 314210 SizeOfPredicates, 2734 NumberOfNonLiveVariables, 104300 ConjunctsInSsa, 3040 ConjunctsInUnsatCore, 295 InterpolantComputations, 4 PerfectInterpolantSequences, 23841/317088 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.8ms, 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, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.6ms, 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