/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:13:07,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:13:07,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:13:07,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:13:07,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:13:07,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:13:07,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:13:07,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:13:07,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:13:07,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:13:07,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:13:07,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:13:07,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:13:07,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:13:07,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:13:07,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:13:07,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:13:07,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:13:07,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:13:07,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:13:07,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:13:07,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:13:07,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:13:07,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:13:07,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 18:13:07,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 18:13:07,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 18:13:07,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 18:13:07,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 18:13:07,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 18:13:07,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 18:13:07,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 18:13:07,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 18:13:07,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 18:13:07,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 18:13:07,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 18:13:07,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 18:13:07,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 18:13:07,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:13:07,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:13:07,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:13:07,073 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 [2021-06-05 18:13:07,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:13:07,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:13:07,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:13:07,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:13:07,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:13:07,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:13:07,101 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:13:07,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:13:07,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:13:07,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:13:07,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:13:07,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:13:07,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:13:07,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:13:07,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:13:07,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:13:07,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:13:07,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:13:07,350 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:13:07,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2021-06-05 18:13:07,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726827842/40f1f856a7fc4ee3a6af6999344faf74/FLAG5d3a1767d [2021-06-05 18:13:07,843 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:13:07,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2021-06-05 18:13:07,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726827842/40f1f856a7fc4ee3a6af6999344faf74/FLAG5d3a1767d [2021-06-05 18:13:07,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726827842/40f1f856a7fc4ee3a6af6999344faf74 [2021-06-05 18:13:07,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:13:07,874 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:13:07,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:13:07,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:13:07,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:13:07,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:13:07" (1/1) ... [2021-06-05 18:13:07,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e86d321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:07, skipping insertion in model container [2021-06-05 18:13:07,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:13:07" (1/1) ... [2021-06-05 18:13:07,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:13:07,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:13:08,244 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] [2021-06-05 18:13:08,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:13:08,263 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:13:08,299 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] [2021-06-05 18:13:08,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:13:08,397 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:13:08,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08 WrapperNode [2021-06-05 18:13:08,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:13:08,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:13:08,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:13:08,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:13:08,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:13:08,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:13:08,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:13:08,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:13:08,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (1/1) ... [2021-06-05 18:13:08,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:13:08,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:13:08,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:13:08,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:13:08,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (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 [2021-06-05 18:13:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:13:08,522 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:13:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:13:08,522 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:13:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:13:08,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:13:08,524 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:13:08,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:13:08,936 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-06-05 18:13:08,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:08 BoogieIcfgContainer [2021-06-05 18:13:08,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:13:08,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:13:08,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:13:08,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:13:08,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:13:07" (1/3) ... [2021-06-05 18:13:08,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3651ec39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:13:08, skipping insertion in model container [2021-06-05 18:13:08,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:13:08" (2/3) ... [2021-06-05 18:13:08,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3651ec39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:13:08, skipping insertion in model container [2021-06-05 18:13:08,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:13:08" (3/3) ... [2021-06-05 18:13:08,941 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2021-06-05 18:13:08,945 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:13:08,945 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:13:08,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 18:13:08,945 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:13:08,966 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,966 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,970 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,971 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,972 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,978 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,980 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,980 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,981 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,981 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,987 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,987 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,987 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,987 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,988 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,988 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,988 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,990 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,991 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,992 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,994 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,996 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,997 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,998 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:08,999 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,000 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,003 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,003 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,005 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,005 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,005 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,006 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,007 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,008 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,010 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,011 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,012 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:13:09,022 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 18:13:09,035 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:13:09,046 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:13:09,047 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:13:09,047 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:13:09,047 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:13:09,047 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:13:09,047 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:13:09,047 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:13:09,047 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-06-05 18:13:09,055 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:13:09,276 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 18:13:09,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:09,322 INFO L554 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] [2021-06-05 18:13:09,322 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash -712665903, now seen corresponding path program 1 times [2021-06-05 18:13:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298764345] [2021-06-05 18:13:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:09,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298764345] [2021-06-05 18:13:09,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298764345] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:13:09,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:13:09,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:13:09,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635787959] [2021-06-05 18:13:09,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:13:09,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:09,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:13:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:13:09,566 INFO L87 Difference]: Start difference. First operand has 8464 states, 8460 states have (on average 2.8685579196217494) internal successors, (24268), 8463 states have internal predecessors, (24268), 0 states have call successors, (0), 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) [2021-06-05 18:13:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:09,682 INFO L93 Difference]: Finished difference Result 11835 states and 32305 transitions. [2021-06-05 18:13:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:13:09,684 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 [2021-06-05 18:13:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:09,738 INFO L225 Difference]: With dead ends: 11835 [2021-06-05 18:13:09,738 INFO L226 Difference]: Without dead ends: 10548 [2021-06-05 18:13:09,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:13:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10548 states. [2021-06-05 18:13:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10548 to 10224. [2021-06-05 18:13:10,065 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) [2021-06-05 18:13:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 28212 transitions. [2021-06-05 18:13:10,102 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 28212 transitions. Word has length 54 [2021-06-05 18:13:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:10,102 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 28212 transitions. [2021-06-05 18:13:10,103 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) [2021-06-05 18:13:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 28212 transitions. [2021-06-05 18:13:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 18:13:10,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:10,108 INFO L554 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] [2021-06-05 18:13:10,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:13:10,109 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash -89293531, now seen corresponding path program 1 times [2021-06-05 18:13:10,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:10,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972405797] [2021-06-05 18:13:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:10,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:10,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972405797] [2021-06-05 18:13:10,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972405797] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:13:10,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:13:10,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 18:13:10,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950105773] [2021-06-05 18:13:10,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 18:13:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 18:13:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 18:13:10,240 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) [2021-06-05 18:13:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:10,341 INFO L93 Difference]: Finished difference Result 15012 states and 41360 transitions. [2021-06-05 18:13:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 18:13:10,342 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 [2021-06-05 18:13:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:10,392 INFO L225 Difference]: With dead ends: 15012 [2021-06-05 18:13:10,393 INFO L226 Difference]: Without dead ends: 15012 [2021-06-05 18:13:10,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 18:13:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15012 states. [2021-06-05 18:13:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15012 to 10980. [2021-06-05 18:13:10,641 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) [2021-06-05 18:13:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 30288 transitions. [2021-06-05 18:13:10,672 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 30288 transitions. Word has length 63 [2021-06-05 18:13:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:10,673 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 30288 transitions. [2021-06-05 18:13:10,673 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) [2021-06-05 18:13:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 30288 transitions. [2021-06-05 18:13:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 18:13:10,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:10,682 INFO L554 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] [2021-06-05 18:13:10,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:13:10,682 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:10,687 INFO L82 PathProgramCache]: Analyzing trace with hash -835995566, now seen corresponding path program 1 times [2021-06-05 18:13:10,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:10,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051377953] [2021-06-05 18:13:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:10,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:10,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051377953] [2021-06-05 18:13:10,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051377953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:10,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391290641] [2021-06-05 18:13:10,770 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 [2021-06-05 18:13:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 18:13:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:11,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391290641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:11,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:11,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 18:13:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305265811] [2021-06-05 18:13:11,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:13:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:13:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:13:11,125 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) [2021-06-05 18:13:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:11,373 INFO L93 Difference]: Finished difference Result 18555 states and 50921 transitions. [2021-06-05 18:13:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:13:11,373 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 [2021-06-05 18:13:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:11,405 INFO L225 Difference]: With dead ends: 18555 [2021-06-05 18:13:11,405 INFO L226 Difference]: Without dead ends: 18555 [2021-06-05 18:13:11,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:13:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-06-05 18:13:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 14604. [2021-06-05 18:13:11,724 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) [2021-06-05 18:13:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 40201 transitions. [2021-06-05 18:13:11,760 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 40201 transitions. Word has length 88 [2021-06-05 18:13:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:11,761 INFO L482 AbstractCegarLoop]: Abstraction has 14604 states and 40201 transitions. [2021-06-05 18:13:11,761 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) [2021-06-05 18:13:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 40201 transitions. [2021-06-05 18:13:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-05 18:13:11,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:11,777 INFO L554 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] [2021-06-05 18:13:11,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 18:13:11,991 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1893907773, now seen corresponding path program 1 times [2021-06-05 18:13:11,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:11,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941190243] [2021-06-05 18:13:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 18:13:12,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:12,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941190243] [2021-06-05 18:13:12,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941190243] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:13:12,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:13:12,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 18:13:12,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24845203] [2021-06-05 18:13:12,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 18:13:12,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 18:13:12,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:13:12,029 INFO L87 Difference]: Start difference. First operand 14604 states and 40201 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:12,053 INFO L93 Difference]: Finished difference Result 6196 states and 15963 transitions. [2021-06-05 18:13:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 18:13:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:13:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:12,062 INFO L225 Difference]: With dead ends: 6196 [2021-06-05 18:13:12,062 INFO L226 Difference]: Without dead ends: 6076 [2021-06-05 18:13:12,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 18:13:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-06-05 18:13:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5876. [2021-06-05 18:13:12,126 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) [2021-06-05 18:13:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 15107 transitions. [2021-06-05 18:13:12,136 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 15107 transitions. Word has length 109 [2021-06-05 18:13:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:12,137 INFO L482 AbstractCegarLoop]: Abstraction has 5876 states and 15107 transitions. [2021-06-05 18:13:12,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 15107 transitions. [2021-06-05 18:13:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-06-05 18:13:12,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:12,146 INFO L554 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] [2021-06-05 18:13:12,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:13:12,146 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1832797293, now seen corresponding path program 2 times [2021-06-05 18:13:12,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:12,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020650713] [2021-06-05 18:13:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:12,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020650713] [2021-06-05 18:13:12,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020650713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790508393] [2021-06-05 18:13:12,294 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 [2021-06-05 18:13:12,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:13:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:12,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790508393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:12,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:12,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 18:13:12,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46369898] [2021-06-05 18:13:12,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:13:12,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:13:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:13:12,552 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) [2021-06-05 18:13:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:12,661 INFO L93 Difference]: Finished difference Result 9595 states and 24725 transitions. [2021-06-05 18:13:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:13:12,661 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 [2021-06-05 18:13:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:12,674 INFO L225 Difference]: With dead ends: 9595 [2021-06-05 18:13:12,674 INFO L226 Difference]: Without dead ends: 9595 [2021-06-05 18:13:12,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9595 states. [2021-06-05 18:13:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9595 to 7678. [2021-06-05 18:13:12,810 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) [2021-06-05 18:13:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 19717 transitions. [2021-06-05 18:13:12,823 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 19717 transitions. Word has length 122 [2021-06-05 18:13:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:12,824 INFO L482 AbstractCegarLoop]: Abstraction has 7678 states and 19717 transitions. [2021-06-05 18:13:12,824 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) [2021-06-05 18:13:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 19717 transitions. [2021-06-05 18:13:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-06-05 18:13:12,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:12,833 INFO L554 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] [2021-06-05 18:13:13,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:13,049 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1290156653, now seen corresponding path program 1 times [2021-06-05 18:13:13,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:13,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883896215] [2021-06-05 18:13:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:13,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:13,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883896215] [2021-06-05 18:13:13,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883896215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:13,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613722951] [2021-06-05 18:13:13,148 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 [2021-06-05 18:13:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 18:13:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:13,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613722951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:13,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:13,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 18:13:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793841688] [2021-06-05 18:13:13,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:13:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:13:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:13:13,425 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) [2021-06-05 18:13:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:13,547 INFO L93 Difference]: Finished difference Result 11373 states and 29306 transitions. [2021-06-05 18:13:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:13:13,547 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 [2021-06-05 18:13:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:13,560 INFO L225 Difference]: With dead ends: 11373 [2021-06-05 18:13:13,560 INFO L226 Difference]: Without dead ends: 11373 [2021-06-05 18:13:13,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:13:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-06-05 18:13:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8938. [2021-06-05 18:13:13,710 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) [2021-06-05 18:13:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 23166 transitions. [2021-06-05 18:13:13,723 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 23166 transitions. Word has length 123 [2021-06-05 18:13:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:13,723 INFO L482 AbstractCegarLoop]: Abstraction has 8938 states and 23166 transitions. [2021-06-05 18:13:13,723 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) [2021-06-05 18:13:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 23166 transitions. [2021-06-05 18:13:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-06-05 18:13:13,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:13,733 INFO L554 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] [2021-06-05 18:13:13,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:13,951 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1495248532, now seen corresponding path program 3 times [2021-06-05 18:13:13,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:13,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306747160] [2021-06-05 18:13:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:14,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306747160] [2021-06-05 18:13:14,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306747160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433855494] [2021-06-05 18:13:14,035 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 [2021-06-05 18:13:14,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:13:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:13:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433855494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:14,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:14,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 18:13:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946965207] [2021-06-05 18:13:14,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:13:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:13:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:13:14,358 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) [2021-06-05 18:13:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:14,498 INFO L93 Difference]: Finished difference Result 13937 states and 35971 transitions. [2021-06-05 18:13:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:13:14,499 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 [2021-06-05 18:13:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:14,517 INFO L225 Difference]: With dead ends: 13937 [2021-06-05 18:13:14,517 INFO L226 Difference]: Without dead ends: 13937 [2021-06-05 18:13:14,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2021-06-05 18:13:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 10740. [2021-06-05 18:13:14,680 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) [2021-06-05 18:13:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 27776 transitions. [2021-06-05 18:13:14,699 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 27776 transitions. Word has length 156 [2021-06-05 18:13:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:14,700 INFO L482 AbstractCegarLoop]: Abstraction has 10740 states and 27776 transitions. [2021-06-05 18:13:14,700 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) [2021-06-05 18:13:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 27776 transitions. [2021-06-05 18:13:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-06-05 18:13:14,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:14,713 INFO L554 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] [2021-06-05 18:13:14,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:14,931 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1195624180, now seen corresponding path program 2 times [2021-06-05 18:13:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:14,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924006215] [2021-06-05 18:13:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:15,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924006215] [2021-06-05 18:13:15,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924006215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65437187] [2021-06-05 18:13:15,019 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 [2021-06-05 18:13:15,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:15,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:15,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 18:13:15,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:15,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65437187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:15,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:15,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:13:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024697446] [2021-06-05 18:13:15,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:13:15,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:13:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:13:15,320 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) [2021-06-05 18:13:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:15,465 INFO L93 Difference]: Finished difference Result 15875 states and 41000 transitions. [2021-06-05 18:13:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:13:15,465 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 [2021-06-05 18:13:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:15,481 INFO L225 Difference]: With dead ends: 15875 [2021-06-05 18:13:15,482 INFO L226 Difference]: Without dead ends: 15875 [2021-06-05 18:13:15,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:13:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2021-06-05 18:13:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 12000. [2021-06-05 18:13:15,669 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) [2021-06-05 18:13:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12000 states to 12000 states and 31225 transitions. [2021-06-05 18:13:15,689 INFO L78 Accepts]: Start accepts. Automaton has 12000 states and 31225 transitions. Word has length 157 [2021-06-05 18:13:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 12000 states and 31225 transitions. [2021-06-05 18:13:15,690 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) [2021-06-05 18:13:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 12000 states and 31225 transitions. [2021-06-05 18:13:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:13:15,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:15,706 INFO L554 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] [2021-06-05 18:13:15,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:15,921 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396245, now seen corresponding path program 4 times [2021-06-05 18:13:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881257409] [2021-06-05 18:13:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:16,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881257409] [2021-06-05 18:13:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881257409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943329550] [2021-06-05 18:13:16,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:13:16,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:16,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:13:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:16,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943329550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:16,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:16,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:13:16,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996916478] [2021-06-05 18:13:16,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:13:16,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:16,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:13:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:13:16,369 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) [2021-06-05 18:13:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:16,549 INFO L93 Difference]: Finished difference Result 17199 states and 44580 transitions. [2021-06-05 18:13:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:13:16,550 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 [2021-06-05 18:13:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:16,569 INFO L225 Difference]: With dead ends: 17199 [2021-06-05 18:13:16,569 INFO L226 Difference]: Without dead ends: 17199 [2021-06-05 18:13:16,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:13:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-06-05 18:13:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 13802. [2021-06-05 18:13:16,761 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) [2021-06-05 18:13:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:13:16,781 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 190 [2021-06-05 18:13:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:16,781 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:13:16,781 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) [2021-06-05 18:13:16,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:13:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-06-05 18:13:16,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:16,796 INFO L554 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] [2021-06-05 18:13:17,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:17,009 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash -111979729, now seen corresponding path program 3 times [2021-06-05 18:13:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:17,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859661773] [2021-06-05 18:13:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:13:17,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:17,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859661773] [2021-06-05 18:13:17,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859661773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:17,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666450899] [2021-06-05 18:13:17,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:13:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:13:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:13:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:17,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666450899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:17,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:17,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 18:13:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851203074] [2021-06-05 18:13:17,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:13:17,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:17,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:13:17,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:13:17,428 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) [2021-06-05 18:13:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:17,563 INFO L93 Difference]: Finished difference Result 17787 states and 46053 transitions. [2021-06-05 18:13:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:13:17,564 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 [2021-06-05 18:13:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:17,582 INFO L225 Difference]: With dead ends: 17787 [2021-06-05 18:13:17,583 INFO L226 Difference]: Without dead ends: 17787 [2021-06-05 18:13:17,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:13:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-06-05 18:13:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 13802. [2021-06-05 18:13:17,744 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) [2021-06-05 18:13:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:13:17,764 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-06-05 18:13:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:17,765 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:13:17,765 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) [2021-06-05 18:13:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:13:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-06-05 18:13:17,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:17,778 INFO L554 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] [2021-06-05 18:13:17,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 18:13:17,993 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash -567160853, now seen corresponding path program 4 times [2021-06-05 18:13:17,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:17,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73991233] [2021-06-05 18:13:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:18,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:18,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73991233] [2021-06-05 18:13:18,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73991233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:18,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404647425] [2021-06-05 18:13:18,078 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 [2021-06-05 18:13:18,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:13:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:18,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404647425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:18,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:18,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:13:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757331769] [2021-06-05 18:13:18,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:13:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:13:18,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:13:18,429 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) [2021-06-05 18:13:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:18,614 INFO L93 Difference]: Finished difference Result 19137 states and 49609 transitions. [2021-06-05 18:13:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:13:18,614 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 [2021-06-05 18:13:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:18,635 INFO L225 Difference]: With dead ends: 19137 [2021-06-05 18:13:18,635 INFO L226 Difference]: Without dead ends: 19137 [2021-06-05 18:13:18,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:13:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19137 states. [2021-06-05 18:13:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19137 to 13802. [2021-06-05 18:13:18,799 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) [2021-06-05 18:13:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-06-05 18:13:18,819 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-06-05 18:13:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:18,820 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-06-05 18:13:18,820 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) [2021-06-05 18:13:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-06-05 18:13:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-06-05 18:13:18,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:18,833 INFO L554 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] [2021-06-05 18:13:19,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 18:13:19,034 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1336481917, now seen corresponding path program 1 times [2021-06-05 18:13:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:19,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971236956] [2021-06-05 18:13:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 148 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 18:13:19,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:19,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971236956] [2021-06-05 18:13:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971236956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:19,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792332547] [2021-06-05 18:13:19,194 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 [2021-06-05 18:13:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:13:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 124 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-05 18:13:19,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792332547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:19,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:19,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 18:13:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56177840] [2021-06-05 18:13:19,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:13:19,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:13:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:13:19,547 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:19,724 INFO L93 Difference]: Finished difference Result 24997 states and 64918 transitions. [2021-06-05 18:13:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:13:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:13:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:19,757 INFO L225 Difference]: With dead ends: 24997 [2021-06-05 18:13:19,757 INFO L226 Difference]: Without dead ends: 24997 [2021-06-05 18:13:19,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:13:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24997 states. [2021-06-05 18:13:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24997 to 14962. [2021-06-05 18:13:19,952 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) [2021-06-05 18:13:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 38989 transitions. [2021-06-05 18:13:19,973 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 38989 transitions. Word has length 220 [2021-06-05 18:13:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:19,974 INFO L482 AbstractCegarLoop]: Abstraction has 14962 states and 38989 transitions. [2021-06-05 18:13:19,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 38989 transitions. [2021-06-05 18:13:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-06-05 18:13:19,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:19,989 INFO L554 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] [2021-06-05 18:13:20,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:20,193 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1317035050, now seen corresponding path program 5 times [2021-06-05 18:13:20,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:20,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565051126] [2021-06-05 18:13:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:20,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565051126] [2021-06-05 18:13:20,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565051126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714574118] [2021-06-05 18:13:20,332 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 [2021-06-05 18:13:20,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:13:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:13:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:20,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714574118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:20,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:20,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:13:20,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956737628] [2021-06-05 18:13:20,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:20,733 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) [2021-06-05 18:13:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:20,951 INFO L93 Difference]: Finished difference Result 20871 states and 54084 transitions. [2021-06-05 18:13:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:13:20,951 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 [2021-06-05 18:13:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:20,973 INFO L225 Difference]: With dead ends: 20871 [2021-06-05 18:13:20,974 INFO L226 Difference]: Without dead ends: 20871 [2021-06-05 18:13:20,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:13:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-06-05 18:13:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 16764. [2021-06-05 18:13:21,144 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) [2021-06-05 18:13:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 43599 transitions. [2021-06-05 18:13:21,167 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 43599 transitions. Word has length 224 [2021-06-05 18:13:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:21,167 INFO L482 AbstractCegarLoop]: Abstraction has 16764 states and 43599 transitions. [2021-06-05 18:13:21,167 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) [2021-06-05 18:13:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 43599 transitions. [2021-06-05 18:13:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:13:21,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:21,183 INFO L554 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] [2021-06-05 18:13:21,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:21,398 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1621122864, now seen corresponding path program 5 times [2021-06-05 18:13:21,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:21,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737314571] [2021-06-05 18:13:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:13:21,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:21,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737314571] [2021-06-05 18:13:21,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737314571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:21,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813642881] [2021-06-05 18:13:21,495 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 [2021-06-05 18:13:21,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:13:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:13:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813642881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:21,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:21,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 18:13:21,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282975324] [2021-06-05 18:13:21,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:13:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:13:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:13:21,966 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) [2021-06-05 18:13:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:22,161 INFO L93 Difference]: Finished difference Result 23844 states and 61943 transitions. [2021-06-05 18:13:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:13:22,162 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 [2021-06-05 18:13:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:22,187 INFO L225 Difference]: With dead ends: 23844 [2021-06-05 18:13:22,187 INFO L226 Difference]: Without dead ends: 23844 [2021-06-05 18:13:22,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:13:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23844 states. [2021-06-05 18:13:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23844 to 18704. [2021-06-05 18:13:22,438 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) [2021-06-05 18:13:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 48938 transitions. [2021-06-05 18:13:22,469 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 48938 transitions. Word has length 225 [2021-06-05 18:13:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:22,469 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 48938 transitions. [2021-06-05 18:13:22,469 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) [2021-06-05 18:13:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 48938 transitions. [2021-06-05 18:13:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:13:22,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:22,487 INFO L554 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] [2021-06-05 18:13:22,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 18:13:22,689 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 414347854, now seen corresponding path program 6 times [2021-06-05 18:13:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124854791] [2021-06-05 18:13:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:22,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:22,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124854791] [2021-06-05 18:13:22,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124854791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:22,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616686271] [2021-06-05 18:13:22,785 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 [2021-06-05 18:13:22,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:13:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:13:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616686271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:13:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652963820] [2021-06-05 18:13:23,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:13:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:13:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:13:23,221 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) [2021-06-05 18:13:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:23,435 INFO L93 Difference]: Finished difference Result 30389 states and 79003 transitions. [2021-06-05 18:13:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:13:23,435 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 [2021-06-05 18:13:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:23,474 INFO L225 Difference]: With dead ends: 30389 [2021-06-05 18:13:23,474 INFO L226 Difference]: Without dead ends: 30389 [2021-06-05 18:13:23,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:13:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2021-06-05 18:13:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19964. [2021-06-05 18:13:23,769 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) [2021-06-05 18:13:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:13:23,801 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-06-05 18:13:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:23,802 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:13:23,802 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) [2021-06-05 18:13:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:13:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-06-05 18:13:23,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:23,820 INFO L554 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] [2021-06-05 18:13:24,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:13:24,021 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -40833270, now seen corresponding path program 7 times [2021-06-05 18:13:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:24,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097242613] [2021-06-05 18:13:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097242613] [2021-06-05 18:13:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097242613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563979577] [2021-06-05 18:13:24,132 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 [2021-06-05 18:13:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:13:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:24,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563979577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:24,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:24,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:13:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767614925] [2021-06-05 18:13:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:13:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:13:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:13:24,506 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) [2021-06-05 18:13:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:24,771 INFO L93 Difference]: Finished difference Result 29709 states and 77502 transitions. [2021-06-05 18:13:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:24,772 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 [2021-06-05 18:13:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:24,806 INFO L225 Difference]: With dead ends: 29709 [2021-06-05 18:13:24,806 INFO L226 Difference]: Without dead ends: 29709 [2021-06-05 18:13:24,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:13:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2021-06-05 18:13:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 19964. [2021-06-05 18:13:25,091 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) [2021-06-05 18:13:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:13:25,123 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-06-05 18:13:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:25,123 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:13:25,124 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) [2021-06-05 18:13:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:13:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-06-05 18:13:25,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:25,143 INFO L554 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] [2021-06-05 18:13:25,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:13:25,343 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -288124132, now seen corresponding path program 2 times [2021-06-05 18:13:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:25,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758978476] [2021-06-05 18:13:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 265 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 18:13:25,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758978476] [2021-06-05 18:13:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758978476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4827045] [2021-06-05 18:13:25,457 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 [2021-06-05 18:13:25,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:13:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 241 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-05 18:13:25,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4827045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:25,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:25,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:13:25,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124718153] [2021-06-05 18:13:25,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:13:25,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:13:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:13:25,856 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:26,078 INFO L93 Difference]: Finished difference Result 33419 states and 87480 transitions. [2021-06-05 18:13:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:13:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-06-05 18:13:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:26,116 INFO L225 Difference]: With dead ends: 33419 [2021-06-05 18:13:26,117 INFO L226 Difference]: Without dead ends: 33419 [2021-06-05 18:13:26,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:13:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-05 18:13:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 19964. [2021-06-05 18:13:26,414 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) [2021-06-05 18:13:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-06-05 18:13:26,443 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 254 [2021-06-05 18:13:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:26,443 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-06-05 18:13:26,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.23076923076923) internal successors, (263), 13 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-06-05 18:13:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-06-05 18:13:26,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:26,461 INFO L554 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] [2021-06-05 18:13:26,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:26,662 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1046159806, now seen corresponding path program 3 times [2021-06-05 18:13:26,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:26,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744787813] [2021-06-05 18:13:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-06-05 18:13:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744787813] [2021-06-05 18:13:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744787813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384657280] [2021-06-05 18:13:26,771 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 [2021-06-05 18:13:26,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:13:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:13:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-06-05 18:13:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384657280] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:13:27,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:13:27,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-06-05 18:13:27,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779049857] [2021-06-05 18:13:27,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:13:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:13:27,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:27,140 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:27,303 INFO L93 Difference]: Finished difference Result 26914 states and 70438 transitions. [2021-06-05 18:13:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:13:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-06-05 18:13:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:27,350 INFO L225 Difference]: With dead ends: 26914 [2021-06-05 18:13:27,350 INFO L226 Difference]: Without dead ends: 26914 [2021-06-05 18:13:27,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:13:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-05 18:13:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 20644. [2021-06-05 18:13:27,575 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) [2021-06-05 18:13:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20644 states to 20644 states and 54241 transitions. [2021-06-05 18:13:27,603 INFO L78 Accepts]: Start accepts. Automaton has 20644 states and 54241 transitions. Word has length 254 [2021-06-05 18:13:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:27,603 INFO L482 AbstractCegarLoop]: Abstraction has 20644 states and 54241 transitions. [2021-06-05 18:13:27,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20644 states and 54241 transitions. [2021-06-05 18:13:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-06-05 18:13:27,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:27,621 INFO L554 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] [2021-06-05 18:13:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:13:27,826 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:27,826 INFO L82 PathProgramCache]: Analyzing trace with hash -518142441, now seen corresponding path program 6 times [2021-06-05 18:13:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:27,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466504010] [2021-06-05 18:13:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:27,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:27,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466504010] [2021-06-05 18:13:27,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466504010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:27,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174716591] [2021-06-05 18:13:27,943 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 [2021-06-05 18:13:28,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:13:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:13:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:28,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174716591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:28,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:28,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:13:28,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574140115] [2021-06-05 18:13:28,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:13:28,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:13:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:13:28,416 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) [2021-06-05 18:13:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:28,672 INFO L93 Difference]: Finished difference Result 27943 states and 72966 transitions. [2021-06-05 18:13:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:28,672 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 [2021-06-05 18:13:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:28,704 INFO L225 Difference]: With dead ends: 27943 [2021-06-05 18:13:28,704 INFO L226 Difference]: Without dead ends: 27943 [2021-06-05 18:13:28,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:13:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27943 states. [2021-06-05 18:13:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27943 to 22446. [2021-06-05 18:13:28,949 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) [2021-06-05 18:13:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 58851 transitions. [2021-06-05 18:13:28,980 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 58851 transitions. Word has length 258 [2021-06-05 18:13:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:28,981 INFO L482 AbstractCegarLoop]: Abstraction has 22446 states and 58851 transitions. [2021-06-05 18:13:28,981 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) [2021-06-05 18:13:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 58851 transitions. [2021-06-05 18:13:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:13:29,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:29,000 INFO L554 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] [2021-06-05 18:13:29,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:29,201 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1149446897, now seen corresponding path program 8 times [2021-06-05 18:13:29,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:29,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498449264] [2021-06-05 18:13:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 404 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:13:29,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:29,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498449264] [2021-06-05 18:13:29,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498449264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:29,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324392774] [2021-06-05 18:13:29,297 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 [2021-06-05 18:13:29,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:29,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:13:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:29,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324392774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:29,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:29,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:13:29,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668927437] [2021-06-05 18:13:29,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:13:29,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:29,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:13:29,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:13:29,684 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) [2021-06-05 18:13:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:29,890 INFO L93 Difference]: Finished difference Result 29176 states and 76036 transitions. [2021-06-05 18:13:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:13:29,893 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 [2021-06-05 18:13:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:29,925 INFO L225 Difference]: With dead ends: 29176 [2021-06-05 18:13:29,926 INFO L226 Difference]: Without dead ends: 29176 [2021-06-05 18:13:29,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:13:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2021-06-05 18:13:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 23126. [2021-06-05 18:13:30,188 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) [2021-06-05 18:13:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 60741 transitions. [2021-06-05 18:13:30,226 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 60741 transitions. Word has length 259 [2021-06-05 18:13:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:30,227 INFO L482 AbstractCegarLoop]: Abstraction has 23126 states and 60741 transitions. [2021-06-05 18:13:30,227 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) [2021-06-05 18:13:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 60741 transitions. [2021-06-05 18:13:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:13:30,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:30,249 INFO L554 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] [2021-06-05 18:13:30,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:30,449 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1682508145, now seen corresponding path program 9 times [2021-06-05 18:13:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:30,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557535713] [2021-06-05 18:13:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:30,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:30,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557535713] [2021-06-05 18:13:30,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557535713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:30,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956816721] [2021-06-05 18:13:30,534 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 [2021-06-05 18:13:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:13:30,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:13:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:31,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956816721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:31,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:31,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:13:31,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665625142] [2021-06-05 18:13:31,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:13:31,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:13:31,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:13:31,076 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) [2021-06-05 18:13:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:31,303 INFO L93 Difference]: Finished difference Result 34101 states and 89002 transitions. [2021-06-05 18:13:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:13:31,303 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 [2021-06-05 18:13:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:31,340 INFO L225 Difference]: With dead ends: 34101 [2021-06-05 18:13:31,340 INFO L226 Difference]: Without dead ends: 34101 [2021-06-05 18:13:31,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:13:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-06-05 18:13:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 25066. [2021-06-05 18:13:31,637 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) [2021-06-05 18:13:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25066 states to 25066 states and 66080 transitions. [2021-06-05 18:13:31,674 INFO L78 Accepts]: Start accepts. Automaton has 25066 states and 66080 transitions. Word has length 259 [2021-06-05 18:13:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:31,675 INFO L482 AbstractCegarLoop]: Abstraction has 25066 states and 66080 transitions. [2021-06-05 18:13:31,675 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) [2021-06-05 18:13:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 25066 states and 66080 transitions. [2021-06-05 18:13:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-06-05 18:13:31,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:31,696 INFO L554 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] [2021-06-05 18:13:31,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:13:31,897 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1405684141, now seen corresponding path program 10 times [2021-06-05 18:13:31,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:31,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535545210] [2021-06-05 18:13:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535545210] [2021-06-05 18:13:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535545210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576008739] [2021-06-05 18:13:31,982 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 [2021-06-05 18:13:32,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:13:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576008739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:13:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838125963] [2021-06-05 18:13:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:13:32,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:13:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:13:32,439 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) [2021-06-05 18:13:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:32,673 INFO L93 Difference]: Finished difference Result 34341 states and 90071 transitions. [2021-06-05 18:13:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:13:32,674 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 [2021-06-05 18:13:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:32,711 INFO L225 Difference]: With dead ends: 34341 [2021-06-05 18:13:32,712 INFO L226 Difference]: Without dead ends: 34341 [2021-06-05 18:13:32,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:13:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34341 states. [2021-06-05 18:13:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34341 to 26326. [2021-06-05 18:13:33,028 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) [2021-06-05 18:13:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 69529 transitions. [2021-06-05 18:13:33,070 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 69529 transitions. Word has length 259 [2021-06-05 18:13:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:33,070 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 69529 transitions. [2021-06-05 18:13:33,070 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) [2021-06-05 18:13:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 69529 transitions. [2021-06-05 18:13:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-06-05 18:13:33,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:33,098 INFO L554 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] [2021-06-05 18:13:33,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:33,301 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -498296266, now seen corresponding path program 4 times [2021-06-05 18:13:33,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:33,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908541829] [2021-06-05 18:13:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-06-05 18:13:33,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908541829] [2021-06-05 18:13:33,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908541829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546365994] [2021-06-05 18:13:33,398 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 [2021-06-05 18:13:33,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:33,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-06-05 18:13:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546365994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:33,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:33,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:13:33,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478317088] [2021-06-05 18:13:33,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:13:33,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:33,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:13:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:13:33,879 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) [2021-06-05 18:13:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:34,111 INFO L93 Difference]: Finished difference Result 41691 states and 109020 transitions. [2021-06-05 18:13:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:13:34,112 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 [2021-06-05 18:13:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:34,159 INFO L225 Difference]: With dead ends: 41691 [2021-06-05 18:13:34,159 INFO L226 Difference]: Without dead ends: 41691 [2021-06-05 18:13:34,160 INFO L810 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 [2021-06-05 18:13:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41691 states. [2021-06-05 18:13:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41691 to 29426. [2021-06-05 18:13:34,536 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) [2021-06-05 18:13:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 78022 transitions. [2021-06-05 18:13:34,721 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 78022 transitions. Word has length 283 [2021-06-05 18:13:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:34,721 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 78022 transitions. [2021-06-05 18:13:34,721 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) [2021-06-05 18:13:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 78022 transitions. [2021-06-05 18:13:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-06-05 18:13:34,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:34,749 INFO L554 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] [2021-06-05 18:13:34,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:13:34,949 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1969215169, now seen corresponding path program 5 times [2021-06-05 18:13:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158893922] [2021-06-05 18:13:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 396 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:35,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:35,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158893922] [2021-06-05 18:13:35,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158893922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:35,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657403139] [2021-06-05 18:13:35,048 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 [2021-06-05 18:13:35,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:13:35,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:35,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 372 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:35,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657403139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:35,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:35,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 18:13:35,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002952989] [2021-06-05 18:13:35,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:13:35,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:35,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:13:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:13:35,494 INFO L87 Difference]: Start difference. First operand 29426 states and 78022 transitions. Second operand has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:35,739 INFO L93 Difference]: Finished difference Result 39436 states and 103060 transitions. [2021-06-05 18:13:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:13:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-06-05 18:13:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:35,785 INFO L225 Difference]: With dead ends: 39436 [2021-06-05 18:13:35,786 INFO L226 Difference]: Without dead ends: 39436 [2021-06-05 18:13:35,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:13:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39436 states. [2021-06-05 18:13:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39436 to 27486. [2021-06-05 18:13:36,120 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) [2021-06-05 18:13:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 72683 transitions. [2021-06-05 18:13:36,162 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 72683 transitions. Word has length 288 [2021-06-05 18:13:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:36,162 INFO L482 AbstractCegarLoop]: Abstraction has 27486 states and 72683 transitions. [2021-06-05 18:13:36,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 72683 transitions. [2021-06-05 18:13:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-06-05 18:13:36,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:36,190 INFO L554 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] [2021-06-05 18:13:36,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:13:36,391 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 31545707, now seen corresponding path program 6 times [2021-06-05 18:13:36,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:36,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728570305] [2021-06-05 18:13:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 54 proven. 388 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 18:13:36,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728570305] [2021-06-05 18:13:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728570305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431389198] [2021-06-05 18:13:36,500 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 [2021-06-05 18:13:36,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:13:36,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:13:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 250 proven. 59 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-06-05 18:13:37,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431389198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:37,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:37,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-06-05 18:13:37,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109951358] [2021-06-05 18:13:37,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:13:37,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:13:37,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:13:37,041 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) [2021-06-05 18:13:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:37,646 INFO L93 Difference]: Finished difference Result 56766 states and 149064 transitions. [2021-06-05 18:13:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:13:37,646 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 [2021-06-05 18:13:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:37,717 INFO L225 Difference]: With dead ends: 56766 [2021-06-05 18:13:37,718 INFO L226 Difference]: Without dead ends: 56766 [2021-06-05 18:13:37,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:13:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56766 states. [2021-06-05 18:13:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56766 to 30626. [2021-06-05 18:13:38,186 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) [2021-06-05 18:13:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 81426 transitions. [2021-06-05 18:13:38,232 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 81426 transitions. Word has length 288 [2021-06-05 18:13:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:38,233 INFO L482 AbstractCegarLoop]: Abstraction has 30626 states and 81426 transitions. [2021-06-05 18:13:38,233 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) [2021-06-05 18:13:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 81426 transitions. [2021-06-05 18:13:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-06-05 18:13:38,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:38,262 INFO L554 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] [2021-06-05 18:13:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:38,473 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1883498472, now seen corresponding path program 7 times [2021-06-05 18:13:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:38,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685729205] [2021-06-05 18:13:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:38,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:38,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685729205] [2021-06-05 18:13:38,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685729205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:38,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341898348] [2021-06-05 18:13:38,610 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 [2021-06-05 18:13:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:39,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341898348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:39,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:39,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:13:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300660921] [2021-06-05 18:13:39,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:13:39,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:13:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:13:39,199 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) [2021-06-05 18:13:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:39,524 INFO L93 Difference]: Finished difference Result 39095 states and 103168 transitions. [2021-06-05 18:13:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:13:39,524 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 [2021-06-05 18:13:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:39,570 INFO L225 Difference]: With dead ends: 39095 [2021-06-05 18:13:39,570 INFO L226 Difference]: Without dead ends: 39095 [2021-06-05 18:13:39,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:13:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39095 states. [2021-06-05 18:13:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 33108. [2021-06-05 18:13:40,064 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) [2021-06-05 18:13:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-06-05 18:13:40,123 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 292 [2021-06-05 18:13:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:40,123 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-06-05 18:13:40,124 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) [2021-06-05 18:13:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-06-05 18:13:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:13:40,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:40,160 INFO L554 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] [2021-06-05 18:13:40,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:13:40,363 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 425444978, now seen corresponding path program 11 times [2021-06-05 18:13:40,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:40,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733679551] [2021-06-05 18:13:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 589 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:13:40,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:40,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733679551] [2021-06-05 18:13:40,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733679551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:40,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988477260] [2021-06-05 18:13:40,502 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 [2021-06-05 18:13:40,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:13:40,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:40,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988477260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:40,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:40,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:13:40,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352282014] [2021-06-05 18:13:40,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:40,984 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) [2021-06-05 18:13:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:41,280 INFO L93 Difference]: Finished difference Result 41038 states and 107978 transitions. [2021-06-05 18:13:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:13:41,281 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 [2021-06-05 18:13:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:41,328 INFO L225 Difference]: With dead ends: 41038 [2021-06-05 18:13:41,328 INFO L226 Difference]: Without dead ends: 41038 [2021-06-05 18:13:41,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:13:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41038 states. [2021-06-05 18:13:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41038 to 33108. [2021-06-05 18:13:41,792 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) [2021-06-05 18:13:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-06-05 18:13:41,841 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 293 [2021-06-05 18:13:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:41,841 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-06-05 18:13:41,841 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) [2021-06-05 18:13:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-06-05 18:13:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:13:41,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:41,873 INFO L554 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] [2021-06-05 18:13:42,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:42,073 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1034103440, now seen corresponding path program 12 times [2021-06-05 18:13:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:42,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958169035] [2021-06-05 18:13:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:42,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:42,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958169035] [2021-06-05 18:13:42,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958169035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:42,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158979307] [2021-06-05 18:13:42,178 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 [2021-06-05 18:13:42,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:13:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:42,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158979307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:42,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:13:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950301797] [2021-06-05 18:13:42,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:42,697 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) [2021-06-05 18:13:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:42,986 INFO L93 Difference]: Finished difference Result 46473 states and 122134 transitions. [2021-06-05 18:13:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:13:42,986 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 [2021-06-05 18:13:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:43,038 INFO L225 Difference]: With dead ends: 46473 [2021-06-05 18:13:43,038 INFO L226 Difference]: Without dead ends: 46473 [2021-06-05 18:13:43,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:13:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46473 states. [2021-06-05 18:13:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46473 to 34368. [2021-06-05 18:13:43,473 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) [2021-06-05 18:13:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:13:43,530 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 293 [2021-06-05 18:13:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:43,530 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:13:43,530 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) [2021-06-05 18:13:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:13:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-06-05 18:13:43,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:43,563 INFO L554 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] [2021-06-05 18:13:43,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 18:13:43,764 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1797851602, now seen corresponding path program 13 times [2021-06-05 18:13:43,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:43,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213962371] [2021-06-05 18:13:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:43,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213962371] [2021-06-05 18:13:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213962371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384335131] [2021-06-05 18:13:43,868 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 [2021-06-05 18:13:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:13:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:44,336 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:13:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384335131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:44,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:44,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:13:44,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107816236] [2021-06-05 18:13:44,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:13:44,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:13:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:13:44,459 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) [2021-06-05 18:13:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:44,762 INFO L93 Difference]: Finished difference Result 46513 states and 122653 transitions. [2021-06-05 18:13:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:13:44,763 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 [2021-06-05 18:13:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:44,816 INFO L225 Difference]: With dead ends: 46513 [2021-06-05 18:13:44,816 INFO L226 Difference]: Without dead ends: 46513 [2021-06-05 18:13:44,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:13:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-06-05 18:13:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 36308. [2021-06-05 18:13:45,238 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) [2021-06-05 18:13:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-06-05 18:13:45,290 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 293 [2021-06-05 18:13:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:45,290 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-06-05 18:13:45,290 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) [2021-06-05 18:13:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-06-05 18:13:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:13:45,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:45,326 INFO L554 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] [2021-06-05 18:13:45,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:13:45,528 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:45,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1019457856, now seen corresponding path program 7 times [2021-06-05 18:13:45,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:45,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241251745] [2021-06-05 18:13:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:45,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:45,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241251745] [2021-06-05 18:13:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241251745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:45,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648987899] [2021-06-05 18:13:45,637 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 [2021-06-05 18:13:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:46,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648987899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:46,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:46,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:13:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141357718] [2021-06-05 18:13:46,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:46,089 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:46,524 INFO L93 Difference]: Finished difference Result 50953 states and 133764 transitions. [2021-06-05 18:13:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:13:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:46,578 INFO L225 Difference]: With dead ends: 50953 [2021-06-05 18:13:46,578 INFO L226 Difference]: Without dead ends: 50953 [2021-06-05 18:13:46,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:13:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50953 states. [2021-06-05 18:13:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50953 to 34368. [2021-06-05 18:13:47,003 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) [2021-06-05 18:13:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:13:47,055 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 322 [2021-06-05 18:13:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:47,055 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:13:47,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:13:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:13:47,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:47,089 INFO L554 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] [2021-06-05 18:13:47,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:47,289 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash -187317154, now seen corresponding path program 8 times [2021-06-05 18:13:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:47,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054272349] [2021-06-05 18:13:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:47,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054272349] [2021-06-05 18:13:47,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054272349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213940696] [2021-06-05 18:13:47,401 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 [2021-06-05 18:13:47,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:47,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213940696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:47,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:47,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:13:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185630622] [2021-06-05 18:13:47,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:47,852 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:48,135 INFO L93 Difference]: Finished difference Result 49438 states and 130087 transitions. [2021-06-05 18:13:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:13:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:48,196 INFO L225 Difference]: With dead ends: 49438 [2021-06-05 18:13:48,196 INFO L226 Difference]: Without dead ends: 49438 [2021-06-05 18:13:48,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:13:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49438 states. [2021-06-05 18:13:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49438 to 34368. [2021-06-05 18:13:48,755 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) [2021-06-05 18:13:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-06-05 18:13:48,814 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 322 [2021-06-05 18:13:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:48,815 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-06-05 18:13:48,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-06-05 18:13:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:13:48,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:48,852 INFO L554 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] [2021-06-05 18:13:49,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:49,061 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -298844420, now seen corresponding path program 9 times [2021-06-05 18:13:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:49,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765253692] [2021-06-05 18:13:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:13:49,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765253692] [2021-06-05 18:13:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765253692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776125660] [2021-06-05 18:13:49,191 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 [2021-06-05 18:13:49,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:13:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 557 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:13:49,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776125660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:49,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:49,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 18:13:49,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710088124] [2021-06-05 18:13:49,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:49,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:49,811 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:50,127 INFO L93 Difference]: Finished difference Result 54048 states and 142592 transitions. [2021-06-05 18:13:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:13:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:13:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:50,193 INFO L225 Difference]: With dead ends: 54048 [2021-06-05 18:13:50,193 INFO L226 Difference]: Without dead ends: 54048 [2021-06-05 18:13:50,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:13:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54048 states. [2021-06-05 18:13:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54048 to 36308. [2021-06-05 18:13:50,736 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) [2021-06-05 18:13:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-06-05 18:13:50,788 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 322 [2021-06-05 18:13:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:50,788 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-06-05 18:13:50,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.666666666666668) internal successors, (310), 15 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-06-05 18:13:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:13:50,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:50,822 INFO L554 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] [2021-06-05 18:13:51,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 18:13:51,025 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1678975488, now seen corresponding path program 10 times [2021-06-05 18:13:51,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:51,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651382967] [2021-06-05 18:13:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651382967] [2021-06-05 18:13:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651382967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522656121] [2021-06-05 18:13:51,120 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 [2021-06-05 18:13:51,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:13:51,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:51,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522656121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:51,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:51,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:13:51,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210804024] [2021-06-05 18:13:51,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:51,841 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) [2021-06-05 18:13:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:52,138 INFO L93 Difference]: Finished difference Result 54193 states and 142578 transitions. [2021-06-05 18:13:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:52,138 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 [2021-06-05 18:13:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:52,204 INFO L225 Difference]: With dead ends: 54193 [2021-06-05 18:13:52,205 INFO L226 Difference]: Without dead ends: 54193 [2021-06-05 18:13:52,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:13:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54193 states. [2021-06-05 18:13:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54193 to 39408. [2021-06-05 18:13:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39408 states, 39406 states have (on average 2.6698218545399177) internal successors, (105207), 39407 states have internal predecessors, (105207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:13:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39408 states to 39408 states and 105207 transitions. [2021-06-05 18:13:52,814 INFO L78 Accepts]: Start accepts. Automaton has 39408 states and 105207 transitions. Word has length 322 [2021-06-05 18:13:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:52,814 INFO L482 AbstractCegarLoop]: Abstraction has 39408 states and 105207 transitions. [2021-06-05 18:13:52,815 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) [2021-06-05 18:13:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 39408 states and 105207 transitions. [2021-06-05 18:13:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-06-05 18:13:52,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:52,851 INFO L554 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] [2021-06-05 18:13:53,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:13:53,052 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1567448222, now seen corresponding path program 11 times [2021-06-05 18:13:53,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:53,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54493648] [2021-06-05 18:13:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:53,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54493648] [2021-06-05 18:13:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54493648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894817482] [2021-06-05 18:13:53,145 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 [2021-06-05 18:13:53,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:13:53,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:13:53,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894817482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:53,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:53,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:13:53,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089116628] [2021-06-05 18:13:53,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:13:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:13:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:13:53,701 INFO L87 Difference]: Start difference. First operand 39408 states and 105207 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) [2021-06-05 18:13:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:54,024 INFO L93 Difference]: Finished difference Result 65138 states and 172813 transitions. [2021-06-05 18:13:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:13:54,025 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 [2021-06-05 18:13:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:54,271 INFO L225 Difference]: With dead ends: 65138 [2021-06-05 18:13:54,271 INFO L226 Difference]: Without dead ends: 65138 [2021-06-05 18:13:54,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:13:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65138 states. [2021-06-05 18:13:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65138 to 41348. [2021-06-05 18:13:54,875 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) [2021-06-05 18:13:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 110546 transitions. [2021-06-05 18:13:54,938 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 110546 transitions. Word has length 322 [2021-06-05 18:13:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:54,939 INFO L482 AbstractCegarLoop]: Abstraction has 41348 states and 110546 transitions. [2021-06-05 18:13:54,939 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) [2021-06-05 18:13:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 110546 transitions. [2021-06-05 18:13:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-06-05 18:13:55,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:55,089 INFO L554 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] [2021-06-05 18:13:55,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 18:13:55,301 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -350311975, now seen corresponding path program 8 times [2021-06-05 18:13:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125728452] [2021-06-05 18:13:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:55,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:55,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125728452] [2021-06-05 18:13:55,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125728452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:55,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332648862] [2021-06-05 18:13:55,454 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 [2021-06-05 18:13:55,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:55,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:55,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:13:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332648862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:55,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:55,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:13:55,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970974748] [2021-06-05 18:13:55,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:13:55,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:13:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:13:55,989 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) [2021-06-05 18:13:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:56,393 INFO L93 Difference]: Finished difference Result 50527 states and 134028 transitions. [2021-06-05 18:13:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:13:56,393 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 [2021-06-05 18:13:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:56,459 INFO L225 Difference]: With dead ends: 50527 [2021-06-05 18:13:56,459 INFO L226 Difference]: Without dead ends: 50527 [2021-06-05 18:13:56,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:13:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2021-06-05 18:13:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 43150. [2021-06-05 18:13:57,032 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) [2021-06-05 18:13:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-06-05 18:13:57,227 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 326 [2021-06-05 18:13:57,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:57,228 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-06-05 18:13:57,228 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) [2021-06-05 18:13:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-06-05 18:13:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:13:57,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:57,268 INFO L554 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] [2021-06-05 18:13:57,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:13:57,468 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:57,469 INFO L82 PathProgramCache]: Analyzing trace with hash -947502669, now seen corresponding path program 14 times [2021-06-05 18:13:57,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:57,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592197654] [2021-06-05 18:13:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:13:57,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:57,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592197654] [2021-06-05 18:13:57,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592197654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:57,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779128979] [2021-06-05 18:13:57,605 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 [2021-06-05 18:13:57,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:13:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:57,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:13:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779128979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:58,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:13:58,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:13:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86696597] [2021-06-05 18:13:58,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:13:58,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:13:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:13:58,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:13:58,113 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) [2021-06-05 18:13:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:13:58,442 INFO L93 Difference]: Finished difference Result 53420 states and 141238 transitions. [2021-06-05 18:13:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:13:58,443 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 [2021-06-05 18:13:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:13:58,507 INFO L225 Difference]: With dead ends: 53420 [2021-06-05 18:13:58,507 INFO L226 Difference]: Without dead ends: 53420 [2021-06-05 18:13:58,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:13:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-06-05 18:13:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 43830. [2021-06-05 18:13:59,063 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) [2021-06-05 18:13:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43830 states to 43830 states and 117046 transitions. [2021-06-05 18:13:59,129 INFO L78 Accepts]: Start accepts. Automaton has 43830 states and 117046 transitions. Word has length 327 [2021-06-05 18:13:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:13:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 43830 states and 117046 transitions. [2021-06-05 18:13:59,130 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) [2021-06-05 18:13:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 43830 states and 117046 transitions. [2021-06-05 18:13:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:13:59,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:13:59,299 INFO L554 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] [2021-06-05 18:13:59,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:13:59,499 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:13:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:13:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash -765780399, now seen corresponding path program 15 times [2021-06-05 18:13:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:13:59,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799224440] [2021-06-05 18:13:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:13:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:13:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:13:59,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:13:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799224440] [2021-06-05 18:13:59,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799224440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:13:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640127026] [2021-06-05 18:13:59,641 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 [2021-06-05 18:13:59,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:13:59,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:13:59,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:13:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:00,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640127026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:00,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:00,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:14:00,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067149770] [2021-06-05 18:14:00,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:00,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:00,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:00,261 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) [2021-06-05 18:14:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:00,675 INFO L93 Difference]: Finished difference Result 57625 states and 151795 transitions. [2021-06-05 18:14:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:00,676 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 [2021-06-05 18:14:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:00,744 INFO L225 Difference]: With dead ends: 57625 [2021-06-05 18:14:00,744 INFO L226 Difference]: Without dead ends: 57625 [2021-06-05 18:14:00,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:14:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57625 states. [2021-06-05 18:14:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57625 to 43150. [2021-06-05 18:14:01,346 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) [2021-06-05 18:14:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-06-05 18:14:01,410 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 327 [2021-06-05 18:14:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:01,410 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-06-05 18:14:01,410 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) [2021-06-05 18:14:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-06-05 18:14:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:14:01,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:01,452 INFO L554 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] [2021-06-05 18:14:01,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:14:01,652 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash -157121937, now seen corresponding path program 16 times [2021-06-05 18:14:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332845834] [2021-06-05 18:14:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:01,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:01,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332845834] [2021-06-05 18:14:01,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332845834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:01,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458470089] [2021-06-05 18:14:01,782 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 [2021-06-05 18:14:02,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:02,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:02,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:14:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:02,272 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:14:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458470089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:02,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:02,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:14:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280597391] [2021-06-05 18:14:02,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:02,503 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) [2021-06-05 18:14:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:02,874 INFO L93 Difference]: Finished difference Result 58745 states and 155304 transitions. [2021-06-05 18:14:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:02,875 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 [2021-06-05 18:14:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:02,943 INFO L225 Difference]: With dead ends: 58745 [2021-06-05 18:14:02,943 INFO L226 Difference]: Without dead ends: 58745 [2021-06-05 18:14:02,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=345, Invalid=845, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:14:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58745 states. [2021-06-05 18:14:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58745 to 45090. [2021-06-05 18:14:03,653 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) [2021-06-05 18:14:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45090 states to 45090 states and 120495 transitions. [2021-06-05 18:14:03,728 INFO L78 Accepts]: Start accepts. Automaton has 45090 states and 120495 transitions. Word has length 327 [2021-06-05 18:14:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:03,728 INFO L482 AbstractCegarLoop]: Abstraction has 45090 states and 120495 transitions. [2021-06-05 18:14:03,728 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) [2021-06-05 18:14:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 45090 states and 120495 transitions. [2021-06-05 18:14:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:14:03,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:03,943 INFO L554 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] [2021-06-05 18:14:04,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:14:04,144 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1305890317, now seen corresponding path program 17 times [2021-06-05 18:14:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:04,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699389400] [2021-06-05 18:14:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:04,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699389400] [2021-06-05 18:14:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699389400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:04,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611420414] [2021-06-05 18:14:04,262 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 [2021-06-05 18:14:04,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:14:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:14:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611420414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:04,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:04,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:14:04,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533320016] [2021-06-05 18:14:04,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:04,793 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) [2021-06-05 18:14:05,172 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:14:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:05,301 INFO L93 Difference]: Finished difference Result 64210 states and 169402 transitions. [2021-06-05 18:14:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:14:05,302 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 [2021-06-05 18:14:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:05,381 INFO L225 Difference]: With dead ends: 64210 [2021-06-05 18:14:05,381 INFO L226 Difference]: Without dead ends: 64210 [2021-06-05 18:14:05,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:14:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2021-06-05 18:14:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 48290. [2021-06-05 18:14:06,029 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) [2021-06-05 18:14:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48290 states to 48290 states and 129283 transitions. [2021-06-05 18:14:06,103 INFO L78 Accepts]: Start accepts. Automaton has 48290 states and 129283 transitions. Word has length 327 [2021-06-05 18:14:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:06,103 INFO L482 AbstractCegarLoop]: Abstraction has 48290 states and 129283 transitions. [2021-06-05 18:14:06,104 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) [2021-06-05 18:14:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 48290 states and 129283 transitions. [2021-06-05 18:14:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:14:06,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:06,147 INFO L554 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] [2021-06-05 18:14:06,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:14:06,348 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 99115307, now seen corresponding path program 18 times [2021-06-05 18:14:06,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:06,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333360658] [2021-06-05 18:14:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333360658] [2021-06-05 18:14:06,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333360658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648236212] [2021-06-05 18:14:06,466 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 [2021-06-05 18:14:06,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:14:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:14:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648236212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:07,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:07,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:14:07,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124994604] [2021-06-05 18:14:07,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:07,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:07,298 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) [2021-06-05 18:14:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:07,704 INFO L93 Difference]: Finished difference Result 71055 states and 187712 transitions. [2021-06-05 18:14:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:14:07,705 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 [2021-06-05 18:14:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:07,792 INFO L225 Difference]: With dead ends: 71055 [2021-06-05 18:14:07,792 INFO L226 Difference]: Without dead ends: 71055 [2021-06-05 18:14:07,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:14:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71055 states. [2021-06-05 18:14:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71055 to 49550. [2021-06-05 18:14:08,671 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) [2021-06-05 18:14:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49550 states to 49550 states and 132732 transitions. [2021-06-05 18:14:08,749 INFO L78 Accepts]: Start accepts. Automaton has 49550 states and 132732 transitions. Word has length 327 [2021-06-05 18:14:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:08,749 INFO L482 AbstractCegarLoop]: Abstraction has 49550 states and 132732 transitions. [2021-06-05 18:14:08,750 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) [2021-06-05 18:14:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 49550 states and 132732 transitions. [2021-06-05 18:14:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-06-05 18:14:08,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:08,794 INFO L554 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] [2021-06-05 18:14:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:14:08,995 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash -12411959, now seen corresponding path program 19 times [2021-06-05 18:14:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250041851] [2021-06-05 18:14:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:09,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:09,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250041851] [2021-06-05 18:14:09,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250041851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:09,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957899867] [2021-06-05 18:14:09,111 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 [2021-06-05 18:14:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:14:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:09,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957899867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:09,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:09,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:14:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671643665] [2021-06-05 18:14:09,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:14:09,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:14:09,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:14:09,543 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) [2021-06-05 18:14:09,862 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:14:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:10,052 INFO L93 Difference]: Finished difference Result 66465 states and 176301 transitions. [2021-06-05 18:14:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:14:10,053 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 [2021-06-05 18:14:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:10,129 INFO L225 Difference]: With dead ends: 66465 [2021-06-05 18:14:10,129 INFO L226 Difference]: Without dead ends: 66465 [2021-06-05 18:14:10,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:14:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66465 states. [2021-06-05 18:14:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66465 to 48190. [2021-06-05 18:14:10,865 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) [2021-06-05 18:14:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 128952 transitions. [2021-06-05 18:14:10,943 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 128952 transitions. Word has length 327 [2021-06-05 18:14:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:10,943 INFO L482 AbstractCegarLoop]: Abstraction has 48190 states and 128952 transitions. [2021-06-05 18:14:10,943 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) [2021-06-05 18:14:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 128952 transitions. [2021-06-05 18:14:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-06-05 18:14:10,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:10,990 INFO L554 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] [2021-06-05 18:14:11,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:11,191 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2010118382, now seen corresponding path program 12 times [2021-06-05 18:14:11,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:11,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333641772] [2021-06-05 18:14:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 602 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:14:11,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333641772] [2021-06-05 18:14:11,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333641772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810460956] [2021-06-05 18:14:11,303 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 [2021-06-05 18:14:11,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:14:11,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:11,868 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:14:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 578 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:14:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810460956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:12,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:12,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 18:14:12,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271189618] [2021-06-05 18:14:12,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:14:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:14:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:14:12,048 INFO L87 Difference]: Start difference. First operand 48190 states and 128952 transitions. Second operand has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 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) [2021-06-05 18:14:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:12,384 INFO L93 Difference]: Finished difference Result 84430 states and 223303 transitions. [2021-06-05 18:14:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:14:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 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 351 [2021-06-05 18:14:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:12,483 INFO L225 Difference]: With dead ends: 84430 [2021-06-05 18:14:12,483 INFO L226 Difference]: Without dead ends: 84430 [2021-06-05 18:14:12,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:14:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84430 states. [2021-06-05 18:14:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84430 to 57010. [2021-06-05 18:14:13,356 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) [2021-06-05 18:14:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-06-05 18:14:13,629 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 351 [2021-06-05 18:14:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:13,629 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-06-05 18:14:13,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 21.785714285714285) internal successors, (305), 14 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) [2021-06-05 18:14:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-06-05 18:14:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:13,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:13,697 INFO L554 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] [2021-06-05 18:14:13,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:13,898 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash 853408001, now seen corresponding path program 13 times [2021-06-05 18:14:13,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:13,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143584959] [2021-06-05 18:14:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:14:14,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143584959] [2021-06-05 18:14:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143584959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757915327] [2021-06-05 18:14:14,040 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 [2021-06-05 18:14:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:14:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757915327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:14,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:14,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:14:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104867346] [2021-06-05 18:14:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:14,496 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:14,995 INFO L93 Difference]: Finished difference Result 75215 states and 199169 transitions. [2021-06-05 18:14:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:14,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:14:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:15,084 INFO L225 Difference]: With dead ends: 75215 [2021-06-05 18:14:15,084 INFO L226 Difference]: Without dead ends: 75215 [2021-06-05 18:14:15,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:14:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75215 states. [2021-06-05 18:14:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75215 to 55070. [2021-06-05 18:14:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55070 states, 55068 states have (on average 2.6844628459359337) internal successors, (147828), 55069 states have internal predecessors, (147828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55070 states to 55070 states and 147828 transitions. [2021-06-05 18:14:16,060 INFO L78 Accepts]: Start accepts. Automaton has 55070 states and 147828 transitions. Word has length 356 [2021-06-05 18:14:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:16,061 INFO L482 AbstractCegarLoop]: Abstraction has 55070 states and 147828 transitions. [2021-06-05 18:14:16,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 55070 states and 147828 transitions. [2021-06-05 18:14:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:16,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:16,121 INFO L554 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] [2021-06-05 18:14:16,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:16,322 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:16,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1978547041, now seen corresponding path program 14 times [2021-06-05 18:14:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:16,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112995184] [2021-06-05 18:14:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:14:16,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:16,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112995184] [2021-06-05 18:14:16,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112995184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:16,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317670477] [2021-06-05 18:14:16,455 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 [2021-06-05 18:14:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:14:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317670477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:16,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:16,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:14:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345605977] [2021-06-05 18:14:16,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:16,916 INFO L87 Difference]: Start difference. First operand 55070 states and 147828 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:17,469 INFO L93 Difference]: Finished difference Result 83920 states and 222943 transitions. [2021-06-05 18:14:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:14:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:17,568 INFO L225 Difference]: With dead ends: 83920 [2021-06-05 18:14:17,569 INFO L226 Difference]: Without dead ends: 83920 [2021-06-05 18:14:17,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:14:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83920 states. [2021-06-05 18:14:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83920 to 56330. [2021-06-05 18:14:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56330 states, 56328 states have (on average 2.6856447947734696) internal successors, (151277), 56329 states have internal predecessors, (151277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56330 states to 56330 states and 151277 transitions. [2021-06-05 18:14:18,521 INFO L78 Accepts]: Start accepts. Automaton has 56330 states and 151277 transitions. Word has length 356 [2021-06-05 18:14:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:18,522 INFO L482 AbstractCegarLoop]: Abstraction has 56330 states and 151277 transitions. [2021-06-05 18:14:18,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56330 states and 151277 transitions. [2021-06-05 18:14:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:18,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:18,590 INFO L554 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] [2021-06-05 18:14:18,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 18:14:18,791 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1109645245, now seen corresponding path program 15 times [2021-06-05 18:14:18,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:18,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347103039] [2021-06-05 18:14:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:14:18,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347103039] [2021-06-05 18:14:18,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347103039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815651665] [2021-06-05 18:14:18,917 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 [2021-06-05 18:14:19,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:14:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:14:19,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815651665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:19,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:19,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:14:19,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181755622] [2021-06-05 18:14:19,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:19,767 INFO L87 Difference]: Start difference. First operand 56330 states and 151277 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:20,185 INFO L93 Difference]: Finished difference Result 79860 states and 212857 transitions. [2021-06-05 18:14:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:14:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:20,286 INFO L225 Difference]: With dead ends: 79860 [2021-06-05 18:14:20,287 INFO L226 Difference]: Without dead ends: 79860 [2021-06-05 18:14:20,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:14:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79860 states. [2021-06-05 18:14:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79860 to 57010. [2021-06-05 18:14:21,179 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) [2021-06-05 18:14:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-06-05 18:14:21,270 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 356 [2021-06-05 18:14:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:21,270 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-06-05 18:14:21,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-06-05 18:14:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:21,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:21,335 INFO L554 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] [2021-06-05 18:14:21,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:21,535 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 998117979, now seen corresponding path program 16 times [2021-06-05 18:14:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:21,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147748020] [2021-06-05 18:14:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:14:21,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:21,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147748020] [2021-06-05 18:14:21,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147748020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:21,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5336840] [2021-06-05 18:14:21,664 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 [2021-06-05 18:14:22,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 776 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:14:22,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5336840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:22,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:22,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:14:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336608690] [2021-06-05 18:14:22,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:22,471 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:22,865 INFO L93 Difference]: Finished difference Result 80745 states and 215054 transitions. [2021-06-05 18:14:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:14:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:14:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:22,960 INFO L225 Difference]: With dead ends: 80745 [2021-06-05 18:14:22,960 INFO L226 Difference]: Without dead ends: 80745 [2021-06-05 18:14:22,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:14:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80745 states. [2021-06-05 18:14:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80745 to 57690. [2021-06-05 18:14:23,830 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) [2021-06-05 18:14:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 155057 transitions. [2021-06-05 18:14:23,922 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 155057 transitions. Word has length 356 [2021-06-05 18:14:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:23,923 INFO L482 AbstractCegarLoop]: Abstraction has 57690 states and 155057 transitions. [2021-06-05 18:14:23,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.235294117647058) internal successors, (344), 17 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 155057 transitions. [2021-06-05 18:14:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:24,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:24,113 INFO L554 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] [2021-06-05 18:14:24,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:24,320 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1126090303, now seen corresponding path program 17 times [2021-06-05 18:14:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:24,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471821959] [2021-06-05 18:14:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:24,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471821959] [2021-06-05 18:14:24,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471821959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539858782] [2021-06-05 18:14:24,454 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 [2021-06-05 18:14:24,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:14:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:25,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539858782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:25,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:25,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:14:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24926819] [2021-06-05 18:14:25,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:25,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:25,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:25,033 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) [2021-06-05 18:14:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:25,455 INFO L93 Difference]: Finished difference Result 80040 states and 212249 transitions. [2021-06-05 18:14:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:25,456 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 [2021-06-05 18:14:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:25,568 INFO L225 Difference]: With dead ends: 80040 [2021-06-05 18:14:25,569 INFO L226 Difference]: Without dead ends: 80040 [2021-06-05 18:14:25,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:14:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80040 states. [2021-06-05 18:14:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80040 to 56230. [2021-06-05 18:14:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56230 states, 56228 states have (on average 2.6851746460838015) internal successors, (150982), 56229 states have internal predecessors, (150982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56230 states to 56230 states and 150982 transitions. [2021-06-05 18:14:26,614 INFO L78 Accepts]: Start accepts. Automaton has 56230 states and 150982 transitions. Word has length 356 [2021-06-05 18:14:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:26,614 INFO L482 AbstractCegarLoop]: Abstraction has 56230 states and 150982 transitions. [2021-06-05 18:14:26,614 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) [2021-06-05 18:14:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 56230 states and 150982 transitions. [2021-06-05 18:14:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:26,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:26,807 INFO L554 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] [2021-06-05 18:14:27,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:14:27,007 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1962101983, now seen corresponding path program 18 times [2021-06-05 18:14:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:27,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505139546] [2021-06-05 18:14:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:27,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505139546] [2021-06-05 18:14:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505139546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803532751] [2021-06-05 18:14:27,119 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 [2021-06-05 18:14:27,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:14:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:27,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803532751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:27,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:27,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:14:27,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310817232] [2021-06-05 18:14:27,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:27,760 INFO L87 Difference]: Start difference. First operand 56230 states and 150982 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) [2021-06-05 18:14:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:28,171 INFO L93 Difference]: Finished difference Result 93860 states and 250583 transitions. [2021-06-05 18:14:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:14:28,172 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 [2021-06-05 18:14:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:28,287 INFO L225 Difference]: With dead ends: 93860 [2021-06-05 18:14:28,287 INFO L226 Difference]: Without dead ends: 93860 [2021-06-05 18:14:28,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=280, Invalid=776, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:14:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93860 states. [2021-06-05 18:14:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93860 to 60790. [2021-06-05 18:14:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60790 states, 60788 states have (on average 2.6904981246298614) internal successors, (163550), 60789 states have internal predecessors, (163550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60790 states to 60790 states and 163550 transitions. [2021-06-05 18:14:29,521 INFO L78 Accepts]: Start accepts. Automaton has 60790 states and 163550 transitions. Word has length 356 [2021-06-05 18:14:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:29,521 INFO L482 AbstractCegarLoop]: Abstraction has 60790 states and 163550 transitions. [2021-06-05 18:14:29,521 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) [2021-06-05 18:14:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 60790 states and 163550 transitions. [2021-06-05 18:14:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:29,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:29,597 INFO L554 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] [2021-06-05 18:14:29,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:14:29,798 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1850574717, now seen corresponding path program 19 times [2021-06-05 18:14:29,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:29,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550887225] [2021-06-05 18:14:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:29,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550887225] [2021-06-05 18:14:29,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550887225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714990969] [2021-06-05 18:14:29,923 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 [2021-06-05 18:14:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714990969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:14:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225816565] [2021-06-05 18:14:30,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:30,426 INFO L87 Difference]: Start difference. First operand 60790 states and 163550 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) [2021-06-05 18:14:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:30,858 INFO L93 Difference]: Finished difference Result 92305 states and 246335 transitions. [2021-06-05 18:14:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:30,859 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 [2021-06-05 18:14:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:31,166 INFO L225 Difference]: With dead ends: 92305 [2021-06-05 18:14:31,166 INFO L226 Difference]: Without dead ends: 92305 [2021-06-05 18:14:31,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:14:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92305 states. [2021-06-05 18:14:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92305 to 60110. [2021-06-05 18:14:32,071 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) [2021-06-05 18:14:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60110 states to 60110 states and 161660 transitions. [2021-06-05 18:14:32,164 INFO L78 Accepts]: Start accepts. Automaton has 60110 states and 161660 transitions. Word has length 356 [2021-06-05 18:14:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:32,164 INFO L482 AbstractCegarLoop]: Abstraction has 60110 states and 161660 transitions. [2021-06-05 18:14:32,165 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) [2021-06-05 18:14:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 60110 states and 161660 transitions. [2021-06-05 18:14:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:32,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:32,232 INFO L554 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] [2021-06-05 18:14:32,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:14:32,443 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash -466572671, now seen corresponding path program 20 times [2021-06-05 18:14:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:32,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421284921] [2021-06-05 18:14:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:32,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421284921] [2021-06-05 18:14:32,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421284921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212591435] [2021-06-05 18:14:32,553 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 [2021-06-05 18:14:32,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:32,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:33,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212591435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:33,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:33,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:14:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597534659] [2021-06-05 18:14:33,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:33,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:33,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:33,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:33,023 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) [2021-06-05 18:14:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:33,621 INFO L93 Difference]: Finished difference Result 81200 states and 216181 transitions. [2021-06-05 18:14:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:33,621 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 [2021-06-05 18:14:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:33,714 INFO L225 Difference]: With dead ends: 81200 [2021-06-05 18:14:33,714 INFO L226 Difference]: Without dead ends: 81200 [2021-06-05 18:14:33,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:14:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81200 states. [2021-06-05 18:14:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81200 to 62530. [2021-06-05 18:14:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62530 states, 62528 states have (on average 2.691002430910952) internal successors, (168263), 62529 states have internal predecessors, (168263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:14:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62530 states to 62530 states and 168263 transitions. [2021-06-05 18:14:34,744 INFO L78 Accepts]: Start accepts. Automaton has 62530 states and 168263 transitions. Word has length 356 [2021-06-05 18:14:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:34,744 INFO L482 AbstractCegarLoop]: Abstraction has 62530 states and 168263 transitions. [2021-06-05 18:14:34,744 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) [2021-06-05 18:14:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 62530 states and 168263 transitions. [2021-06-05 18:14:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-06-05 18:14:34,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:34,817 INFO L554 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] [2021-06-05 18:14:35,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:35,018 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash -578099937, now seen corresponding path program 21 times [2021-06-05 18:14:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:35,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245885913] [2021-06-05 18:14:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:35,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:35,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245885913] [2021-06-05 18:14:35,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245885913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:35,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421490860] [2021-06-05 18:14:35,143 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 [2021-06-05 18:14:35,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:14:35,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:14:35,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421490860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:35,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:35,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:14:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205877773] [2021-06-05 18:14:35,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:14:35,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:14:35,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:14:35,790 INFO L87 Difference]: Start difference. First operand 62530 states and 168263 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) [2021-06-05 18:14:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:36,460 INFO L93 Difference]: Finished difference Result 107085 states and 286976 transitions. [2021-06-05 18:14:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:14:36,461 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 [2021-06-05 18:14:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:36,589 INFO L225 Difference]: With dead ends: 107085 [2021-06-05 18:14:36,589 INFO L226 Difference]: Without dead ends: 107085 [2021-06-05 18:14:36,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:14:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107085 states. [2021-06-05 18:14:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107085 to 64470. [2021-06-05 18:14:37,694 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) [2021-06-05 18:14:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 173602 transitions. [2021-06-05 18:14:37,801 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 173602 transitions. Word has length 356 [2021-06-05 18:14:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:37,802 INFO L482 AbstractCegarLoop]: Abstraction has 64470 states and 173602 transitions. [2021-06-05 18:14:37,802 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) [2021-06-05 18:14:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 173602 transitions. [2021-06-05 18:14:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-06-05 18:14:37,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:37,873 INFO L554 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] [2021-06-05 18:14:38,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:38,075 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1006996314, now seen corresponding path program 9 times [2021-06-05 18:14:38,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:38,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104435647] [2021-06-05 18:14:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:38,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104435647] [2021-06-05 18:14:38,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104435647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371461080] [2021-06-05 18:14:38,238 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 [2021-06-05 18:14:38,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:14:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:14:39,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371461080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:39,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:39,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:14:39,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198170970] [2021-06-05 18:14:39,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:14:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:14:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:14:39,081 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) [2021-06-05 18:14:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:39,755 INFO L93 Difference]: Finished difference Result 74359 states and 198824 transitions. [2021-06-05 18:14:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:14:39,756 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 [2021-06-05 18:14:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:39,839 INFO L225 Difference]: With dead ends: 74359 [2021-06-05 18:14:39,839 INFO L226 Difference]: Without dead ends: 74359 [2021-06-05 18:14:39,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=601, Invalid=1205, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:14:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74359 states. [2021-06-05 18:14:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74359 to 66272. [2021-06-05 18:14:40,753 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) [2021-06-05 18:14:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66272 states to 66272 states and 178212 transitions. [2021-06-05 18:14:40,874 INFO L78 Accepts]: Start accepts. Automaton has 66272 states and 178212 transitions. Word has length 360 [2021-06-05 18:14:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:40,874 INFO L482 AbstractCegarLoop]: Abstraction has 66272 states and 178212 transitions. [2021-06-05 18:14:40,875 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) [2021-06-05 18:14:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 66272 states and 178212 transitions. [2021-06-05 18:14:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:40,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:40,951 INFO L554 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] [2021-06-05 18:14:41,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:41,151 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1403343692, now seen corresponding path program 20 times [2021-06-05 18:14:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:41,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480838785] [2021-06-05 18:14:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:14:41,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:41,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480838785] [2021-06-05 18:14:41,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480838785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:41,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748512180] [2021-06-05 18:14:41,311 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 [2021-06-05 18:14:41,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:41,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748512180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:41,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:41,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:14:41,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557884068] [2021-06-05 18:14:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:41,777 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) [2021-06-05 18:14:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:42,395 INFO L93 Difference]: Finished difference Result 78842 states and 210214 transitions. [2021-06-05 18:14:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:14:42,396 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 [2021-06-05 18:14:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:42,486 INFO L225 Difference]: With dead ends: 78842 [2021-06-05 18:14:42,486 INFO L226 Difference]: Without dead ends: 78842 [2021-06-05 18:14:42,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:14:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78842 states. [2021-06-05 18:14:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78842 to 67632. [2021-06-05 18:14:43,448 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) [2021-06-05 18:14:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67632 states to 67632 states and 181992 transitions. [2021-06-05 18:14:43,564 INFO L78 Accepts]: Start accepts. Automaton has 67632 states and 181992 transitions. Word has length 361 [2021-06-05 18:14:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:43,564 INFO L482 AbstractCegarLoop]: Abstraction has 67632 states and 181992 transitions. [2021-06-05 18:14:43,564 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) [2021-06-05 18:14:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 67632 states and 181992 transitions. [2021-06-05 18:14:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:43,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:43,641 INFO L554 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] [2021-06-05 18:14:43,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:43,841 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1061232174, now seen corresponding path program 21 times [2021-06-05 18:14:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:43,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350335485] [2021-06-05 18:14:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:43,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350335485] [2021-06-05 18:14:43,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350335485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297456471] [2021-06-05 18:14:43,977 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 [2021-06-05 18:14:44,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:14:44,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:44,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297456471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:44,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:44,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37863021] [2021-06-05 18:14:44,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:44,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:44,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:44,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:44,683 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) [2021-06-05 18:14:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:45,316 INFO L93 Difference]: Finished difference Result 84237 states and 223851 transitions. [2021-06-05 18:14:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:14:45,317 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 [2021-06-05 18:14:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:45,415 INFO L225 Difference]: With dead ends: 84237 [2021-06-05 18:14:45,415 INFO L226 Difference]: Without dead ends: 84237 [2021-06-05 18:14:45,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:14:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84237 states. [2021-06-05 18:14:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84237 to 66952. [2021-06-05 18:14:46,398 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) [2021-06-05 18:14:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66952 states to 66952 states and 180102 transitions. [2021-06-05 18:14:46,519 INFO L78 Accepts]: Start accepts. Automaton has 66952 states and 180102 transitions. Word has length 361 [2021-06-05 18:14:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:46,519 INFO L482 AbstractCegarLoop]: Abstraction has 66952 states and 180102 transitions. [2021-06-05 18:14:46,519 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) [2021-06-05 18:14:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 66952 states and 180102 transitions. [2021-06-05 18:14:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:46,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:46,597 INFO L554 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] [2021-06-05 18:14:46,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 18:14:46,797 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -879509904, now seen corresponding path program 22 times [2021-06-05 18:14:46,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:46,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411548675] [2021-06-05 18:14:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:46,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411548675] [2021-06-05 18:14:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411548675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889347184] [2021-06-05 18:14:46,936 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 [2021-06-05 18:14:47,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:14:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:47,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:47,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:47,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889347184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:47,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:47,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:47,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120744308] [2021-06-05 18:14:47,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:47,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:47,737 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) [2021-06-05 18:14:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:48,411 INFO L93 Difference]: Finished difference Result 87037 states and 232000 transitions. [2021-06-05 18:14:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:14:48,411 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 [2021-06-05 18:14:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:48,515 INFO L225 Difference]: With dead ends: 87037 [2021-06-05 18:14:48,515 INFO L226 Difference]: Without dead ends: 87037 [2021-06-05 18:14:48,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:14:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states. [2021-06-05 18:14:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87037 to 68212. [2021-06-05 18:14:49,500 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) [2021-06-05 18:14:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68212 states to 68212 states and 183551 transitions. [2021-06-05 18:14:49,610 INFO L78 Accepts]: Start accepts. Automaton has 68212 states and 183551 transitions. Word has length 361 [2021-06-05 18:14:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:49,610 INFO L482 AbstractCegarLoop]: Abstraction has 68212 states and 183551 transitions. [2021-06-05 18:14:49,610 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) [2021-06-05 18:14:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 68212 states and 183551 transitions. [2021-06-05 18:14:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:49,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:49,683 INFO L554 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] [2021-06-05 18:14:49,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:49,883 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -270851442, now seen corresponding path program 23 times [2021-06-05 18:14:49,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:49,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310032868] [2021-06-05 18:14:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:50,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310032868] [2021-06-05 18:14:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310032868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083298943] [2021-06-05 18:14:50,020 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 [2021-06-05 18:14:50,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:14:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:50,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083298943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611706449] [2021-06-05 18:14:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:50,580 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) [2021-06-05 18:14:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:51,290 INFO L93 Difference]: Finished difference Result 91482 states and 243654 transitions. [2021-06-05 18:14:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:14:51,290 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 [2021-06-05 18:14:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:51,392 INFO L225 Difference]: With dead ends: 91482 [2021-06-05 18:14:51,392 INFO L226 Difference]: Without dead ends: 91482 [2021-06-05 18:14:51,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:14:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-06-05 18:14:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 70152. [2021-06-05 18:14:52,446 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) [2021-06-05 18:14:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70152 states to 70152 states and 188890 transitions. [2021-06-05 18:14:52,564 INFO L78 Accepts]: Start accepts. Automaton has 70152 states and 188890 transitions. Word has length 361 [2021-06-05 18:14:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:52,565 INFO L482 AbstractCegarLoop]: Abstraction has 70152 states and 188890 transitions. [2021-06-05 18:14:52,565 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) [2021-06-05 18:14:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 70152 states and 188890 transitions. [2021-06-05 18:14:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:52,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:52,640 INFO L554 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] [2021-06-05 18:14:52,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 18:14:52,845 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1192160812, now seen corresponding path program 24 times [2021-06-05 18:14:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:52,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509249665] [2021-06-05 18:14:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:52,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509249665] [2021-06-05 18:14:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509249665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43149306] [2021-06-05 18:14:52,982 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 [2021-06-05 18:14:53,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:14:53,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:53,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43149306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:53,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:53,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:53,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480692972] [2021-06-05 18:14:53,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:53,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:53,647 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) [2021-06-05 18:14:54,107 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:14:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:54,334 INFO L93 Difference]: Finished difference Result 94847 states and 252707 transitions. [2021-06-05 18:14:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:14:54,335 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 [2021-06-05 18:14:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:54,441 INFO L225 Difference]: With dead ends: 94847 [2021-06-05 18:14:54,441 INFO L226 Difference]: Without dead ends: 94847 [2021-06-05 18:14:54,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:14:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94847 states. [2021-06-05 18:14:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94847 to 73352. [2021-06-05 18:14:55,487 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) [2021-06-05 18:14:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-06-05 18:14:55,608 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-06-05 18:14:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:55,609 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-06-05 18:14:55,609 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) [2021-06-05 18:14:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-06-05 18:14:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:55,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:55,689 INFO L554 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] [2021-06-05 18:14:55,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:14:55,906 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -14614198, now seen corresponding path program 25 times [2021-06-05 18:14:55,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:55,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939814813] [2021-06-05 18:14:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939814813] [2021-06-05 18:14:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939814813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359936190] [2021-06-05 18:14:56,039 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 [2021-06-05 18:14:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:56,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359936190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:56,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:56,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:56,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552917820] [2021-06-05 18:14:56,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:56,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:56,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:56,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:56,504 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) [2021-06-05 18:14:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:14:57,231 INFO L93 Difference]: Finished difference Result 91972 states and 244941 transitions. [2021-06-05 18:14:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:14:57,231 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 [2021-06-05 18:14:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:14:57,341 INFO L225 Difference]: With dead ends: 91972 [2021-06-05 18:14:57,341 INFO L226 Difference]: Without dead ends: 91972 [2021-06-05 18:14:57,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:14:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91972 states. [2021-06-05 18:14:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91972 to 73352. [2021-06-05 18:14:58,478 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) [2021-06-05 18:14:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-06-05 18:14:58,599 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-06-05 18:14:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:14:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-06-05 18:14:58,599 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) [2021-06-05 18:14:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-06-05 18:14:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-06-05 18:14:58,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:14:58,681 INFO L554 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] [2021-06-05 18:14:58,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:14:58,881 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:14:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:14:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -126141464, now seen corresponding path program 26 times [2021-06-05 18:14:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:14:58,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340792589] [2021-06-05 18:14:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:14:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:14:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:59,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:14:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340792589] [2021-06-05 18:14:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340792589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:59,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592924353] [2021-06-05 18:14:59,008 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 [2021-06-05 18:14:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:14:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:14:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:14:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:14:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:14:59,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592924353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:14:59,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:14:59,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:14:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74237074] [2021-06-05 18:14:59,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:14:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:14:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:14:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:14:59,759 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) [2021-06-05 18:15:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:00,264 INFO L93 Difference]: Finished difference Result 91272 states and 243453 transitions. [2021-06-05 18:15:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:15:00,265 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 [2021-06-05 18:15:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:00,377 INFO L225 Difference]: With dead ends: 91272 [2021-06-05 18:15:00,377 INFO L226 Difference]: Without dead ends: 91272 [2021-06-05 18:15:00,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:15:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91272 states. [2021-06-05 18:15:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91272 to 72672. [2021-06-05 18:15:01,383 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) [2021-06-05 18:15:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72672 states to 72672 states and 195788 transitions. [2021-06-05 18:15:01,517 INFO L78 Accepts]: Start accepts. Automaton has 72672 states and 195788 transitions. Word has length 361 [2021-06-05 18:15:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:01,518 INFO L482 AbstractCegarLoop]: Abstraction has 72672 states and 195788 transitions. [2021-06-05 18:15:01,518 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) [2021-06-05 18:15:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 72672 states and 195788 transitions. [2021-06-05 18:15:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:15:01,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:01,602 INFO L554 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] [2021-06-05 18:15:01,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:15:01,819 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1351953105, now seen corresponding path program 22 times [2021-06-05 18:15:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:01,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740908890] [2021-06-05 18:15:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:01,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:01,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740908890] [2021-06-05 18:15:01,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740908890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:01,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408881955] [2021-06-05 18:15:01,943 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 [2021-06-05 18:15:02,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:02,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:02,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408881955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:02,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:02,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:15:02,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85266631] [2021-06-05 18:15:02,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:15:02,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:15:02,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:15:02,808 INFO L87 Difference]: Start difference. First operand 72672 states and 195788 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:03,210 INFO L93 Difference]: Finished difference Result 91802 states and 243283 transitions. [2021-06-05 18:15:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:15:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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 385 [2021-06-05 18:15:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:03,320 INFO L225 Difference]: With dead ends: 91802 [2021-06-05 18:15:03,321 INFO L226 Difference]: Without dead ends: 91802 [2021-06-05 18:15:03,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:15:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91802 states. [2021-06-05 18:15:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91802 to 67052. [2021-06-05 18:15:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67052 states, 67050 states have (on average 2.6904847129008203) internal successors, (180397), 67051 states have internal predecessors, (180397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67052 states to 67052 states and 180397 transitions. [2021-06-05 18:15:04,484 INFO L78 Accepts]: Start accepts. Automaton has 67052 states and 180397 transitions. Word has length 385 [2021-06-05 18:15:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:04,485 INFO L482 AbstractCegarLoop]: Abstraction has 67052 states and 180397 transitions. [2021-06-05 18:15:04,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 67052 states and 180397 transitions. [2021-06-05 18:15:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:15:04,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:04,562 INFO L554 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] [2021-06-05 18:15:04,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:04,762 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:04,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:04,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1463480371, now seen corresponding path program 23 times [2021-06-05 18:15:04,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:04,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193893855] [2021-06-05 18:15:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:04,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:04,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193893855] [2021-06-05 18:15:04,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193893855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:04,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444669664] [2021-06-05 18:15:04,882 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 [2021-06-05 18:15:05,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:15:05,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444669664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:05,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:05,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:15:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605133061] [2021-06-05 18:15:05,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:15:05,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:15:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:15:05,601 INFO L87 Difference]: Start difference. First operand 67052 states and 180397 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:06,036 INFO L93 Difference]: Finished difference Result 98607 states and 262626 transitions. [2021-06-05 18:15:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:15:06,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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 385 [2021-06-05 18:15:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:06,167 INFO L225 Difference]: With dead ends: 98607 [2021-06-05 18:15:06,167 INFO L226 Difference]: Without dead ends: 98607 [2021-06-05 18:15:06,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:15:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98607 states. [2021-06-05 18:15:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98607 to 68412. [2021-06-05 18:15:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68412 states, 68410 states have (on average 2.692252594649905) internal successors, (184177), 68411 states have internal predecessors, (184177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68412 states to 68412 states and 184177 transitions. [2021-06-05 18:15:07,387 INFO L78 Accepts]: Start accepts. Automaton has 68412 states and 184177 transitions. Word has length 385 [2021-06-05 18:15:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:07,388 INFO L482 AbstractCegarLoop]: Abstraction has 68412 states and 184177 transitions. [2021-06-05 18:15:07,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 68412 states and 184177 transitions. [2021-06-05 18:15:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:15:07,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:07,467 INFO L554 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] [2021-06-05 18:15:07,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 18:15:07,668 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1508739601, now seen corresponding path program 24 times [2021-06-05 18:15:07,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:07,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232632017] [2021-06-05 18:15:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:15:07,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:07,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232632017] [2021-06-05 18:15:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232632017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686628303] [2021-06-05 18:15:07,788 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 [2021-06-05 18:15:08,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:15:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:08,772 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 797 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:15:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686628303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:08,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:08,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 18:15:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297296734] [2021-06-05 18:15:08,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:15:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:15:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:15:08,799 INFO L87 Difference]: Start difference. First operand 68412 states and 184177 transitions. Second operand has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:09,264 INFO L93 Difference]: Finished difference Result 99387 states and 264871 transitions. [2021-06-05 18:15:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:15:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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 385 [2021-06-05 18:15:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:09,395 INFO L225 Difference]: With dead ends: 99387 [2021-06-05 18:15:09,395 INFO L226 Difference]: Without dead ends: 99387 [2021-06-05 18:15:09,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:15:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99387 states. [2021-06-05 18:15:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99387 to 70352. [2021-06-05 18:15:10,546 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) [2021-06-05 18:15:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 189516 transitions. [2021-06-05 18:15:10,665 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 189516 transitions. Word has length 385 [2021-06-05 18:15:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:10,666 INFO L482 AbstractCegarLoop]: Abstraction has 70352 states and 189516 transitions. [2021-06-05 18:15:10,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.1875) internal successors, (339), 16 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) [2021-06-05 18:15:10,666 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 189516 transitions. [2021-06-05 18:15:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-06-05 18:15:10,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:10,745 INFO L554 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] [2021-06-05 18:15:10,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:10,945 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2063723533, now seen corresponding path program 25 times [2021-06-05 18:15:10,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:10,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503107109] [2021-06-05 18:15:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:11,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:11,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503107109] [2021-06-05 18:15:11,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503107109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:11,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712290378] [2021-06-05 18:15:11,065 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 [2021-06-05 18:15:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:11,792 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:15:11,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712290378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:11,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:11,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:15:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367240953] [2021-06-05 18:15:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:15:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:11,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:15:11,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:15:11,823 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) [2021-06-05 18:15:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:12,279 INFO L93 Difference]: Finished difference Result 110607 states and 294134 transitions. [2021-06-05 18:15:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:15:12,280 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 [2021-06-05 18:15:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:12,429 INFO L225 Difference]: With dead ends: 110607 [2021-06-05 18:15:12,429 INFO L226 Difference]: Without dead ends: 110607 [2021-06-05 18:15:12,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:15:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110607 states. [2021-06-05 18:15:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110607 to 79172. [2021-06-05 18:15:13,690 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) [2021-06-05 18:15:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79172 states to 79172 states and 213731 transitions. [2021-06-05 18:15:13,830 INFO L78 Accepts]: Start accepts. Automaton has 79172 states and 213731 transitions. Word has length 385 [2021-06-05 18:15:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:13,831 INFO L482 AbstractCegarLoop]: Abstraction has 79172 states and 213731 transitions. [2021-06-05 18:15:13,831 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) [2021-06-05 18:15:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 79172 states and 213731 transitions. [2021-06-05 18:15:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:13,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:13,922 INFO L554 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] [2021-06-05 18:15:14,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 18:15:14,129 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -921759614, now seen corresponding path program 26 times [2021-06-05 18:15:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016480764] [2021-06-05 18:15:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:14,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:14,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016480764] [2021-06-05 18:15:14,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016480764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:14,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164736990] [2021-06-05 18:15:14,278 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 [2021-06-05 18:15:14,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:14,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:14,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164736990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:15,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:15,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:15,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075013146] [2021-06-05 18:15:15,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:15,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:15,097 INFO L87 Difference]: Start difference. First operand 79172 states and 213731 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:15,615 INFO L93 Difference]: Finished difference Result 100657 states and 267903 transitions. [2021-06-05 18:15:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:15,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:15:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:15,755 INFO L225 Difference]: With dead ends: 100657 [2021-06-05 18:15:15,755 INFO L226 Difference]: Without dead ends: 100657 [2021-06-05 18:15:15,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100657 states. [2021-06-05 18:15:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100657 to 75872. [2021-06-05 18:15:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75872 states, 75870 states have (on average 2.6968762356662714) internal successors, (204612), 75871 states have internal predecessors, (204612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75872 states to 75872 states and 204612 transitions. [2021-06-05 18:15:17,160 INFO L78 Accepts]: Start accepts. Automaton has 75872 states and 204612 transitions. Word has length 390 [2021-06-05 18:15:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:17,160 INFO L482 AbstractCegarLoop]: Abstraction has 75872 states and 204612 transitions. [2021-06-05 18:15:17,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 75872 states and 204612 transitions. [2021-06-05 18:15:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:17,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:17,253 INFO L554 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] [2021-06-05 18:15:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:17,453 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -313101152, now seen corresponding path program 27 times [2021-06-05 18:15:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83133682] [2021-06-05 18:15:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:17,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:17,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83133682] [2021-06-05 18:15:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83133682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:17,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189094401] [2021-06-05 18:15:17,893 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 [2021-06-05 18:15:18,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:15:18,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:18,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189094401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:18,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:18,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:18,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974226584] [2021-06-05 18:15:18,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:18,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:18,646 INFO L87 Difference]: Start difference. First operand 75872 states and 204612 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:19,333 INFO L93 Difference]: Finished difference Result 110072 states and 293417 transitions. [2021-06-05 18:15:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:19,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:15:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:19,467 INFO L225 Difference]: With dead ends: 110072 [2021-06-05 18:15:19,468 INFO L226 Difference]: Without dead ends: 110072 [2021-06-05 18:15:19,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110072 states. [2021-06-05 18:15:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110072 to 77132. [2021-06-05 18:15:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77132 states, 77130 states have (on average 2.6975366264747827) internal successors, (208061), 77131 states have internal predecessors, (208061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77132 states to 77132 states and 208061 transitions. [2021-06-05 18:15:20,830 INFO L78 Accepts]: Start accepts. Automaton has 77132 states and 208061 transitions. Word has length 390 [2021-06-05 18:15:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:20,830 INFO L482 AbstractCegarLoop]: Abstraction has 77132 states and 208061 transitions. [2021-06-05 18:15:20,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 77132 states and 208061 transitions. [2021-06-05 18:15:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:20,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:20,915 INFO L554 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] [2021-06-05 18:15:21,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 18:15:21,117 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1149911102, now seen corresponding path program 28 times [2021-06-05 18:15:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380144584] [2021-06-05 18:15:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:21,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:21,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380144584] [2021-06-05 18:15:21,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380144584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:21,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293806578] [2021-06-05 18:15:21,266 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 [2021-06-05 18:15:21,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293806578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:22,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004810964] [2021-06-05 18:15:22,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:22,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:22,014 INFO L87 Difference]: Start difference. First operand 77132 states and 208061 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:22,774 INFO L93 Difference]: Finished difference Result 108342 states and 290031 transitions. [2021-06-05 18:15:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:15:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:22,909 INFO L225 Difference]: With dead ends: 108342 [2021-06-05 18:15:22,909 INFO L226 Difference]: Without dead ends: 108342 [2021-06-05 18:15:22,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:15:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108342 states. [2021-06-05 18:15:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108342 to 75872. [2021-06-05 18:15:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75872 states, 75870 states have (on average 2.6968762356662714) internal successors, (204612), 75871 states have internal predecessors, (204612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75872 states to 75872 states and 204612 transitions. [2021-06-05 18:15:24,236 INFO L78 Accepts]: Start accepts. Automaton has 75872 states and 204612 transitions. Word has length 390 [2021-06-05 18:15:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:24,236 INFO L482 AbstractCegarLoop]: Abstraction has 75872 states and 204612 transitions. [2021-06-05 18:15:24,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 75872 states and 204612 transitions. [2021-06-05 18:15:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:24,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:24,320 INFO L554 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] [2021-06-05 18:15:24,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:24,525 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -56863908, now seen corresponding path program 29 times [2021-06-05 18:15:24,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:24,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635996118] [2021-06-05 18:15:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:24,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635996118] [2021-06-05 18:15:24,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635996118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617405880] [2021-06-05 18:15:24,665 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 [2021-06-05 18:15:24,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:15:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:24,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617405880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:25,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:25,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151201516] [2021-06-05 18:15:25,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:25,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:25,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:25,253 INFO L87 Difference]: Start difference. First operand 75872 states and 204612 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:25,995 INFO L93 Difference]: Finished difference Result 104127 states and 278167 transitions. [2021-06-05 18:15:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:15:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:26,131 INFO L225 Difference]: With dead ends: 104127 [2021-06-05 18:15:26,132 INFO L226 Difference]: Without dead ends: 104127 [2021-06-05 18:15:26,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:15:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-06-05 18:15:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 76552. [2021-06-05 18:15:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76552 states, 76550 states have (on average 2.6976094056172437) internal successors, (206502), 76551 states have internal predecessors, (206502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76552 states to 76552 states and 206502 transitions. [2021-06-05 18:15:27,415 INFO L78 Accepts]: Start accepts. Automaton has 76552 states and 206502 transitions. Word has length 390 [2021-06-05 18:15:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 76552 states and 206502 transitions. [2021-06-05 18:15:27,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 76552 states and 206502 transitions. [2021-06-05 18:15:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:27,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:27,502 INFO L554 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] [2021-06-05 18:15:27,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 18:15:27,702 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash -168391174, now seen corresponding path program 30 times [2021-06-05 18:15:27,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:27,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324008602] [2021-06-05 18:15:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:15:27,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:27,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324008602] [2021-06-05 18:15:27,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324008602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:27,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5978180] [2021-06-05 18:15:27,846 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 [2021-06-05 18:15:28,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:15:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:28,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1029 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:15:28,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5978180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:28,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:28,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-06-05 18:15:28,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582766524] [2021-06-05 18:15:28,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:28,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:28,628 INFO L87 Difference]: Start difference. First operand 76552 states and 206502 transitions. Second operand has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:29,407 INFO L93 Difference]: Finished difference Result 101522 states and 270995 transitions. [2021-06-05 18:15:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:15:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:15:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:29,553 INFO L225 Difference]: With dead ends: 101522 [2021-06-05 18:15:29,553 INFO L226 Difference]: Without dead ends: 101522 [2021-06-05 18:15:29,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:15:29,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101522 states. [2021-06-05 18:15:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101522 to 77232. [2021-06-05 18:15:30,677 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) [2021-06-05 18:15:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77232 states to 77232 states and 208392 transitions. [2021-06-05 18:15:30,803 INFO L78 Accepts]: Start accepts. Automaton has 77232 states and 208392 transitions. Word has length 390 [2021-06-05 18:15:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:30,803 INFO L482 AbstractCegarLoop]: Abstraction has 77232 states and 208392 transitions. [2021-06-05 18:15:30,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.894736842105264) internal successors, (378), 19 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 77232 states and 208392 transitions. [2021-06-05 18:15:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:30,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:30,885 INFO L554 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] [2021-06-05 18:15:31,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:15:31,086 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1691492674, now seen corresponding path program 31 times [2021-06-05 18:15:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:31,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954524399] [2021-06-05 18:15:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:31,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954524399] [2021-06-05 18:15:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954524399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663456692] [2021-06-05 18:15:31,229 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 [2021-06-05 18:15:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663456692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:31,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:31,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70262960] [2021-06-05 18:15:31,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:31,736 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) [2021-06-05 18:15:32,046 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:15:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:32,473 INFO L93 Difference]: Finished difference Result 103412 states and 275074 transitions. [2021-06-05 18:15:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:32,473 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 [2021-06-05 18:15:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:32,604 INFO L225 Difference]: With dead ends: 103412 [2021-06-05 18:15:32,604 INFO L226 Difference]: Without dead ends: 103412 [2021-06-05 18:15:32,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103412 states. [2021-06-05 18:15:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103412 to 75772. [2021-06-05 18:15:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75772 states, 75770 states have (on average 2.696542167084598) internal successors, (204317), 75771 states have internal predecessors, (204317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75772 states to 75772 states and 204317 transitions. [2021-06-05 18:15:33,944 INFO L78 Accepts]: Start accepts. Automaton has 75772 states and 204317 transitions. Word has length 390 [2021-06-05 18:15:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:33,945 INFO L482 AbstractCegarLoop]: Abstraction has 75772 states and 204317 transitions. [2021-06-05 18:15:33,945 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) [2021-06-05 18:15:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 75772 states and 204317 transitions. [2021-06-05 18:15:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:34,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:34,031 INFO L554 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] [2021-06-05 18:15:34,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 18:15:34,231 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1140462368, now seen corresponding path program 32 times [2021-06-05 18:15:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:34,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718192027] [2021-06-05 18:15:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:34,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:34,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718192027] [2021-06-05 18:15:34,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718192027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:34,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115939002] [2021-06-05 18:15:34,360 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 [2021-06-05 18:15:34,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:34,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:35,014 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:15:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:35,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115939002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:35,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:35,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715188523] [2021-06-05 18:15:35,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:35,154 INFO L87 Difference]: Start difference. First operand 75772 states and 204317 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) [2021-06-05 18:15:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:35,733 INFO L93 Difference]: Finished difference Result 126012 states and 337737 transitions. [2021-06-05 18:15:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:15:35,734 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 [2021-06-05 18:15:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:35,907 INFO L225 Difference]: With dead ends: 126012 [2021-06-05 18:15:35,907 INFO L226 Difference]: Without dead ends: 126012 [2021-06-05 18:15:35,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:15:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126012 states. [2021-06-05 18:15:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126012 to 80912. [2021-06-05 18:15:37,249 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) [2021-06-05 18:15:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-06-05 18:15:37,391 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-06-05 18:15:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:37,391 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-06-05 18:15:37,391 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) [2021-06-05 18:15:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-06-05 18:15:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:37,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:37,486 INFO L554 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] [2021-06-05 18:15:37,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:37,687 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1947729918, now seen corresponding path program 33 times [2021-06-05 18:15:37,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:37,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17742733] [2021-06-05 18:15:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:38,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17742733] [2021-06-05 18:15:38,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17742733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073220048] [2021-06-05 18:15:38,111 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 [2021-06-05 18:15:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:15:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:38,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073220048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:38,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:38,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:38,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002513115] [2021-06-05 18:15:38,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:38,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:38,864 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) [2021-06-05 18:15:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:39,426 INFO L93 Difference]: Finished difference Result 123087 states and 329886 transitions. [2021-06-05 18:15:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:39,427 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 [2021-06-05 18:15:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:39,587 INFO L225 Difference]: With dead ends: 123087 [2021-06-05 18:15:39,588 INFO L226 Difference]: Without dead ends: 123087 [2021-06-05 18:15:39,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:15:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123087 states. [2021-06-05 18:15:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123087 to 81592. [2021-06-05 18:15:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81592 states, 81590 states have (on average 2.700502512562814) internal successors, (220334), 81591 states have internal predecessors, (220334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81592 states to 81592 states and 220334 transitions. [2021-06-05 18:15:41,311 INFO L78 Accepts]: Start accepts. Automaton has 81592 states and 220334 transitions. Word has length 390 [2021-06-05 18:15:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:41,312 INFO L482 AbstractCegarLoop]: Abstraction has 81592 states and 220334 transitions. [2021-06-05 18:15:41,312 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) [2021-06-05 18:15:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 81592 states and 220334 transitions. [2021-06-05 18:15:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:41,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:41,409 INFO L554 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] [2021-06-05 18:15:41,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:41,610 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1836202652, now seen corresponding path program 34 times [2021-06-05 18:15:41,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:41,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124163934] [2021-06-05 18:15:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:41,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124163934] [2021-06-05 18:15:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124163934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879377990] [2021-06-05 18:15:41,742 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 [2021-06-05 18:15:42,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:15:42,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:42,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879377990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:42,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:42,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109949506] [2021-06-05 18:15:42,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:42,561 INFO L87 Difference]: Start difference. First operand 81592 states and 220334 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) [2021-06-05 18:15:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:43,108 INFO L93 Difference]: Finished difference Result 118272 states and 316304 transitions. [2021-06-05 18:15:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:43,108 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 [2021-06-05 18:15:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:43,262 INFO L225 Difference]: With dead ends: 118272 [2021-06-05 18:15:43,262 INFO L226 Difference]: Without dead ends: 118272 [2021-06-05 18:15:43,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:15:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118272 states. [2021-06-05 18:15:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118272 to 80912. [2021-06-05 18:15:44,731 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) [2021-06-05 18:15:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-06-05 18:15:44,865 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-06-05 18:15:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:44,865 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-06-05 18:15:44,865 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) [2021-06-05 18:15:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-06-05 18:15:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:44,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:44,956 INFO L554 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] [2021-06-05 18:15:45,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:45,158 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash -288005630, now seen corresponding path program 35 times [2021-06-05 18:15:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:45,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879488185] [2021-06-05 18:15:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:45,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:45,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879488185] [2021-06-05 18:15:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879488185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:45,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824200055] [2021-06-05 18:15:45,289 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 [2021-06-05 18:15:45,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:15:45,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:45,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824200055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:45,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:45,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324328471] [2021-06-05 18:15:45,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:45,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:45,904 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) [2021-06-05 18:15:46,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:46,679 INFO L93 Difference]: Finished difference Result 108772 states and 290656 transitions. [2021-06-05 18:15:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:46,680 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 [2021-06-05 18:15:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:46,803 INFO L225 Difference]: With dead ends: 108772 [2021-06-05 18:15:46,803 INFO L226 Difference]: Without dead ends: 108772 [2021-06-05 18:15:46,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:15:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108772 states. [2021-06-05 18:15:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108772 to 79452. [2021-06-05 18:15:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79452 states, 79450 states have (on average 2.698162366268093) internal successors, (214369), 79451 states have internal predecessors, (214369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79452 states to 79452 states and 214369 transitions. [2021-06-05 18:15:48,181 INFO L78 Accepts]: Start accepts. Automaton has 79452 states and 214369 transitions. Word has length 390 [2021-06-05 18:15:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:48,182 INFO L482 AbstractCegarLoop]: Abstraction has 79452 states and 214369 transitions. [2021-06-05 18:15:48,182 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) [2021-06-05 18:15:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 79452 states and 214369 transitions. [2021-06-05 18:15:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:48,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:48,273 INFO L554 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] [2021-06-05 18:15:48,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 18:15:48,473 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:48,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1494780640, now seen corresponding path program 36 times [2021-06-05 18:15:48,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:48,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438213589] [2021-06-05 18:15:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:48,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:48,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438213589] [2021-06-05 18:15:48,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438213589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:48,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546941589] [2021-06-05 18:15:48,605 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 [2021-06-05 18:15:48,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:15:48,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:48,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:49,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546941589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:49,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:49,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:49,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057265878] [2021-06-05 18:15:49,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:49,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:49,323 INFO L87 Difference]: Start difference. First operand 79452 states and 214369 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) [2021-06-05 18:15:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:50,161 INFO L93 Difference]: Finished difference Result 144497 states and 388615 transitions. [2021-06-05 18:15:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:15:50,162 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 [2021-06-05 18:15:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:50,366 INFO L225 Difference]: With dead ends: 144497 [2021-06-05 18:15:50,366 INFO L226 Difference]: Without dead ends: 144497 [2021-06-05 18:15:50,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:15:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144497 states. [2021-06-05 18:15:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144497 to 84012. [2021-06-05 18:15:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84012 states, 84010 states have (on average 2.701309367932389) internal successors, (226937), 84011 states have internal predecessors, (226937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84012 states to 84012 states and 226937 transitions. [2021-06-05 18:15:51,978 INFO L78 Accepts]: Start accepts. Automaton has 84012 states and 226937 transitions. Word has length 390 [2021-06-05 18:15:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:51,979 INFO L482 AbstractCegarLoop]: Abstraction has 84012 states and 226937 transitions. [2021-06-05 18:15:51,979 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) [2021-06-05 18:15:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 84012 states and 226937 transitions. [2021-06-05 18:15:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:52,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:52,073 INFO L554 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] [2021-06-05 18:15:52,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:52,274 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:52,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1606307906, now seen corresponding path program 37 times [2021-06-05 18:15:52,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:52,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263665968] [2021-06-05 18:15:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:52,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263665968] [2021-06-05 18:15:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263665968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703797186] [2021-06-05 18:15:52,407 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 [2021-06-05 18:15:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:52,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:53,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703797186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:53,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:53,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994415500] [2021-06-05 18:15:53,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:53,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:53,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:53,227 INFO L87 Difference]: Start difference. First operand 84012 states and 226937 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) [2021-06-05 18:15:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:53,842 INFO L93 Difference]: Finished difference Result 134952 states and 362479 transitions. [2021-06-05 18:15:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:53,842 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 [2021-06-05 18:15:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:54,026 INFO L225 Difference]: With dead ends: 134952 [2021-06-05 18:15:54,027 INFO L226 Difference]: Without dead ends: 134952 [2021-06-05 18:15:54,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:15:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134952 states. [2021-06-05 18:15:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134952 to 85952. [2021-06-05 18:15:55,587 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) [2021-06-05 18:15:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85952 states to 85952 states and 232276 transitions. [2021-06-05 18:15:55,984 INFO L78 Accepts]: Start accepts. Automaton has 85952 states and 232276 transitions. Word has length 390 [2021-06-05 18:15:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:55,985 INFO L482 AbstractCegarLoop]: Abstraction has 85952 states and 232276 transitions. [2021-06-05 18:15:55,985 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) [2021-06-05 18:15:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 85952 states and 232276 transitions. [2021-06-05 18:15:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:56,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:56,085 INFO L554 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] [2021-06-05 18:15:56,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:56,285 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 371512002, now seen corresponding path program 38 times [2021-06-05 18:15:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:56,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840058515] [2021-06-05 18:15:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:56,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:56,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840058515] [2021-06-05 18:15:56,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840058515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423067331] [2021-06-05 18:15:56,417 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 [2021-06-05 18:15:56,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:15:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:15:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:15:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:15:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:56,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423067331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:56,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:15:56,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:15:56,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103757961] [2021-06-05 18:15:56,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:15:56,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:15:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:15:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:15:56,952 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) [2021-06-05 18:15:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:15:57,539 INFO L93 Difference]: Finished difference Result 121397 states and 324452 transitions. [2021-06-05 18:15:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:15:57,539 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 [2021-06-05 18:15:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:15:57,961 INFO L225 Difference]: With dead ends: 121397 [2021-06-05 18:15:57,961 INFO L226 Difference]: Without dead ends: 121397 [2021-06-05 18:15:57,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:15:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121397 states. [2021-06-05 18:15:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121397 to 83552. [2021-06-05 18:15:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83552 states, 83550 states have (on average 2.6993656493117895) internal successors, (225532), 83551 states have internal predecessors, (225532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:15:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83552 states to 83552 states and 225532 transitions. [2021-06-05 18:15:59,386 INFO L78 Accepts]: Start accepts. Automaton has 83552 states and 225532 transitions. Word has length 390 [2021-06-05 18:15:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:15:59,387 INFO L482 AbstractCegarLoop]: Abstraction has 83552 states and 225532 transitions. [2021-06-05 18:15:59,387 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) [2021-06-05 18:15:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 83552 states and 225532 transitions. [2021-06-05 18:15:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:15:59,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:15:59,485 INFO L554 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] [2021-06-05 18:15:59,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:15:59,686 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:15:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:15:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 259984736, now seen corresponding path program 39 times [2021-06-05 18:15:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:15:59,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856285987] [2021-06-05 18:15:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:15:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:15:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:15:59,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:15:59,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856285987] [2021-06-05 18:15:59,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856285987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:15:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609844860] [2021-06-05 18:15:59,817 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 [2021-06-05 18:16:00,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:16:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:00,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609844860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:00,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:00,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:16:00,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915592157] [2021-06-05 18:16:00,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:16:00,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:16:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:16:00,515 INFO L87 Difference]: Start difference. First operand 83552 states and 225532 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) [2021-06-05 18:16:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:01,390 INFO L93 Difference]: Finished difference Result 143412 states and 385227 transitions. [2021-06-05 18:16:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:16:01,390 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 [2021-06-05 18:16:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:01,579 INFO L225 Difference]: With dead ends: 143412 [2021-06-05 18:16:01,580 INFO L226 Difference]: Without dead ends: 143412 [2021-06-05 18:16:01,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:16:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143412 states. [2021-06-05 18:16:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143412 to 85492. [2021-06-05 18:16:03,050 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) [2021-06-05 18:16:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85492 states to 85492 states and 230871 transitions. [2021-06-05 18:16:03,203 INFO L78 Accepts]: Start accepts. Automaton has 85492 states and 230871 transitions. Word has length 390 [2021-06-05 18:16:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:03,204 INFO L482 AbstractCegarLoop]: Abstraction has 85492 states and 230871 transitions. [2021-06-05 18:16:03,204 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) [2021-06-05 18:16:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 85492 states and 230871 transitions. [2021-06-05 18:16:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-06-05 18:16:03,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:03,303 INFO L554 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] [2021-06-05 18:16:03,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 18:16:03,504 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:03,504 INFO L82 PathProgramCache]: Analyzing trace with hash 214725506, now seen corresponding path program 40 times [2021-06-05 18:16:03,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:03,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420257333] [2021-06-05 18:16:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:03,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:03,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420257333] [2021-06-05 18:16:03,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420257333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:03,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200073963] [2021-06-05 18:16:03,633 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 [2021-06-05 18:16:04,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:04,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:04,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:04,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:16:04,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200073963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:04,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:04,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:16:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76432331] [2021-06-05 18:16:04,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:16:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:16:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:16:04,666 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) [2021-06-05 18:16:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:05,206 INFO L93 Difference]: Finished difference Result 110267 states and 294603 transitions. [2021-06-05 18:16:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:16:05,206 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 [2021-06-05 18:16:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:05,357 INFO L225 Difference]: With dead ends: 110267 [2021-06-05 18:16:05,357 INFO L226 Difference]: Without dead ends: 110267 [2021-06-05 18:16:05,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:16:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110267 states. [2021-06-05 18:16:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110267 to 86752. [2021-06-05 18:16:06,682 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) [2021-06-05 18:16:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86752 states to 86752 states and 234320 transitions. [2021-06-05 18:16:07,091 INFO L78 Accepts]: Start accepts. Automaton has 86752 states and 234320 transitions. Word has length 390 [2021-06-05 18:16:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:07,092 INFO L482 AbstractCegarLoop]: Abstraction has 86752 states and 234320 transitions. [2021-06-05 18:16:07,092 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) [2021-06-05 18:16:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 86752 states and 234320 transitions. [2021-06-05 18:16:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-06-05 18:16:07,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:07,182 INFO L554 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] [2021-06-05 18:16:07,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:07,383 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash 657247387, now seen corresponding path program 10 times [2021-06-05 18:16:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:07,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527152787] [2021-06-05 18:16:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:07,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:07,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527152787] [2021-06-05 18:16:07,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527152787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:07,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264652002] [2021-06-05 18:16:07,579 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 [2021-06-05 18:16:08,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:16:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264652002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:08,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:16:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933576327] [2021-06-05 18:16:08,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:16:08,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:16:08,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:16:08,461 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) [2021-06-05 18:16:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:09,068 INFO L93 Difference]: Finished difference Result 98251 states and 263785 transitions. [2021-06-05 18:16:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:16:09,068 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 [2021-06-05 18:16:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:09,186 INFO L225 Difference]: With dead ends: 98251 [2021-06-05 18:16:09,187 INFO L226 Difference]: Without dead ends: 98251 [2021-06-05 18:16:09,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=716, Invalid=1446, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:16:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98251 states. [2021-06-05 18:16:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98251 to 89234. [2021-06-05 18:16:10,586 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) [2021-06-05 18:16:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89234 states to 89234 states and 240820 transitions. [2021-06-05 18:16:10,738 INFO L78 Accepts]: Start accepts. Automaton has 89234 states and 240820 transitions. Word has length 394 [2021-06-05 18:16:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:10,739 INFO L482 AbstractCegarLoop]: Abstraction has 89234 states and 240820 transitions. [2021-06-05 18:16:10,739 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) [2021-06-05 18:16:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 89234 states and 240820 transitions. [2021-06-05 18:16:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:10,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:10,838 INFO L554 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] [2021-06-05 18:16:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:11,038 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:11,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1529681781, now seen corresponding path program 27 times [2021-06-05 18:16:11,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:11,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876534154] [2021-06-05 18:16:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1348 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:16:11,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:11,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876534154] [2021-06-05 18:16:11,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876534154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:11,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611009587] [2021-06-05 18:16:11,212 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 [2021-06-05 18:16:11,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:16:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611009587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-06-05 18:16:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857506771] [2021-06-05 18:16:12,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:12,170 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) [2021-06-05 18:16:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:12,963 INFO L93 Difference]: Finished difference Result 103444 states and 276915 transitions. [2021-06-05 18:16:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:12,963 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 [2021-06-05 18:16:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:13,080 INFO L225 Difference]: With dead ends: 103444 [2021-06-05 18:16:13,081 INFO L226 Difference]: Without dead ends: 103444 [2021-06-05 18:16:13,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103444 states. [2021-06-05 18:16:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103444 to 89914. [2021-06-05 18:16:14,299 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) [2021-06-05 18:16:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-06-05 18:16:14,458 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-06-05 18:16:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:14,458 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-06-05 18:16:14,459 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) [2021-06-05 18:16:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-06-05 18:16:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:14,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:14,564 INFO L554 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] [2021-06-05 18:16:14,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:16:14,764 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1135248659, now seen corresponding path program 28 times [2021-06-05 18:16:14,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:14,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814370851] [2021-06-05 18:16:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:14,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814370851] [2021-06-05 18:16:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814370851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:14,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87700775] [2021-06-05 18:16:14,927 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 [2021-06-05 18:16:15,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87700775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:15,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:15,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107446536] [2021-06-05 18:16:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:15,714 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) [2021-06-05 18:16:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:16,545 INFO L93 Difference]: Finished difference Result 110429 states and 294732 transitions. [2021-06-05 18:16:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:16:16,546 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 [2021-06-05 18:16:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:16,685 INFO L225 Difference]: With dead ends: 110429 [2021-06-05 18:16:16,685 INFO L226 Difference]: Without dead ends: 110429 [2021-06-05 18:16:16,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:16:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110429 states. [2021-06-05 18:16:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110429 to 89914. [2021-06-05 18:16:18,013 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) [2021-06-05 18:16:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-06-05 18:16:18,182 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-06-05 18:16:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:18,183 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-06-05 18:16:18,183 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) [2021-06-05 18:16:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-06-05 18:16:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:18,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:18,288 INFO L554 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] [2021-06-05 18:16:18,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:18,488 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1477360177, now seen corresponding path program 29 times [2021-06-05 18:16:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:18,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919111583] [2021-06-05 18:16:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:18,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:18,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919111583] [2021-06-05 18:16:18,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919111583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:18,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735486173] [2021-06-05 18:16:18,647 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 [2021-06-05 18:16:18,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:16:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:19,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735486173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:19,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:19,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:19,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648448513] [2021-06-05 18:16:19,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:19,545 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) [2021-06-05 18:16:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:20,139 INFO L93 Difference]: Finished difference Result 111689 states and 298642 transitions. [2021-06-05 18:16:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:16:20,139 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 [2021-06-05 18:16:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:20,290 INFO L225 Difference]: With dead ends: 111689 [2021-06-05 18:16:20,290 INFO L226 Difference]: Without dead ends: 111689 [2021-06-05 18:16:20,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:16:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-06-05 18:16:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 88554. [2021-06-05 18:16:21,631 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) [2021-06-05 18:16:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88554 states to 88554 states and 238930 transitions. [2021-06-05 18:16:21,788 INFO L78 Accepts]: Start accepts. Automaton has 88554 states and 238930 transitions. Word has length 395 [2021-06-05 18:16:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:21,789 INFO L482 AbstractCegarLoop]: Abstraction has 88554 states and 238930 transitions. [2021-06-05 18:16:21,789 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) [2021-06-05 18:16:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 88554 states and 238930 transitions. [2021-06-05 18:16:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:22,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:22,200 INFO L554 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] [2021-06-05 18:16:22,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:22,417 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1659082447, now seen corresponding path program 30 times [2021-06-05 18:16:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842776098] [2021-06-05 18:16:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842776098] [2021-06-05 18:16:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842776098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:22,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593190020] [2021-06-05 18:16:22,578 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 [2021-06-05 18:16:23,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:16:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:23,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:23,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593190020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:23,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:23,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:23,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459038671] [2021-06-05 18:16:23,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:23,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:23,490 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) [2021-06-05 18:16:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:24,120 INFO L93 Difference]: Finished difference Result 117004 states and 312456 transitions. [2021-06-05 18:16:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:16:24,120 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 [2021-06-05 18:16:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:24,275 INFO L225 Difference]: With dead ends: 117004 [2021-06-05 18:16:24,275 INFO L226 Difference]: Without dead ends: 117004 [2021-06-05 18:16:24,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:16:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117004 states. [2021-06-05 18:16:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117004 to 89814. [2021-06-05 18:16:25,843 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) [2021-06-05 18:16:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89814 states to 89814 states and 242379 transitions. [2021-06-05 18:16:25,993 INFO L78 Accepts]: Start accepts. Automaton has 89814 states and 242379 transitions. Word has length 395 [2021-06-05 18:16:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:25,993 INFO L482 AbstractCegarLoop]: Abstraction has 89814 states and 242379 transitions. [2021-06-05 18:16:25,993 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) [2021-06-05 18:16:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 89814 states and 242379 transitions. [2021-06-05 18:16:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:26,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:26,097 INFO L554 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] [2021-06-05 18:16:26,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:26,298 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:26,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2027226387, now seen corresponding path program 31 times [2021-06-05 18:16:26,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:26,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9673731] [2021-06-05 18:16:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:26,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:26,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9673731] [2021-06-05 18:16:26,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9673731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778611251] [2021-06-05 18:16:26,458 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 [2021-06-05 18:16:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778611251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:26,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:26,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:26,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106740206] [2021-06-05 18:16:26,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:26,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:26,974 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) [2021-06-05 18:16:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:27,824 INFO L93 Difference]: Finished difference Result 119859 states and 319930 transitions. [2021-06-05 18:16:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:16:27,824 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 [2021-06-05 18:16:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:27,967 INFO L225 Difference]: With dead ends: 119859 [2021-06-05 18:16:27,967 INFO L226 Difference]: Without dead ends: 119859 [2021-06-05 18:16:27,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:16:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119859 states. [2021-06-05 18:16:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119859 to 91754. [2021-06-05 18:16:29,263 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) [2021-06-05 18:16:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91754 states to 91754 states and 247718 transitions. [2021-06-05 18:16:29,429 INFO L78 Accepts]: Start accepts. Automaton has 91754 states and 247718 transitions. Word has length 395 [2021-06-05 18:16:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:29,429 INFO L482 AbstractCegarLoop]: Abstraction has 91754 states and 247718 transitions. [2021-06-05 18:16:29,429 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) [2021-06-05 18:16:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 91754 states and 247718 transitions. [2021-06-05 18:16:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:29,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:29,539 INFO L554 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] [2021-06-05 18:16:29,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:29,739 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash -564214133, now seen corresponding path program 32 times [2021-06-05 18:16:29,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:29,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604759291] [2021-06-05 18:16:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:29,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604759291] [2021-06-05 18:16:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604759291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808922637] [2021-06-05 18:16:29,898 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 [2021-06-05 18:16:30,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:30,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808922637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:30,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:30,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:30,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717862004] [2021-06-05 18:16:30,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:30,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:30,419 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) [2021-06-05 18:16:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:31,312 INFO L93 Difference]: Finished difference Result 120574 states and 321904 transitions. [2021-06-05 18:16:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:16:31,313 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 [2021-06-05 18:16:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:31,471 INFO L225 Difference]: With dead ends: 120574 [2021-06-05 18:16:31,471 INFO L226 Difference]: Without dead ends: 120574 [2021-06-05 18:16:31,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:16:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120574 states. [2021-06-05 18:16:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120574 to 90494. [2021-06-05 18:16:32,838 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) [2021-06-05 18:16:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-06-05 18:16:32,996 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-06-05 18:16:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:32,997 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-06-05 18:16:32,997 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) [2021-06-05 18:16:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-06-05 18:16:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:33,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:33,101 INFO L554 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] [2021-06-05 18:16:33,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:33,302 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1770989143, now seen corresponding path program 33 times [2021-06-05 18:16:33,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:33,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91218428] [2021-06-05 18:16:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:33,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:33,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91218428] [2021-06-05 18:16:33,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91218428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:33,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127261080] [2021-06-05 18:16:33,819 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 [2021-06-05 18:16:34,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:16:34,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127261080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:34,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:34,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:34,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529167328] [2021-06-05 18:16:34,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:34,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:34,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:34,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:34,665 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) [2021-06-05 18:16:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:35,331 INFO L93 Difference]: Finished difference Result 116589 states and 311298 transitions. [2021-06-05 18:16:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:16:35,331 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 [2021-06-05 18:16:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:35,486 INFO L225 Difference]: With dead ends: 116589 [2021-06-05 18:16:35,486 INFO L226 Difference]: Without dead ends: 116589 [2021-06-05 18:16:35,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:16:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116589 states. [2021-06-05 18:16:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116589 to 90494. [2021-06-05 18:16:36,856 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) [2021-06-05 18:16:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-06-05 18:16:37,262 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-06-05 18:16:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:37,263 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-06-05 18:16:37,263 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) [2021-06-05 18:16:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-06-05 18:16:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-06-05 18:16:37,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:37,367 INFO L554 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] [2021-06-05 18:16:37,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:37,568 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1882516409, now seen corresponding path program 34 times [2021-06-05 18:16:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:37,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438371863] [2021-06-05 18:16:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:37,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:37,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438371863] [2021-06-05 18:16:37,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438371863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:37,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625770494] [2021-06-05 18:16:37,726 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 [2021-06-05 18:16:38,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:16:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:16:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:16:38,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625770494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:38,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:38,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:16:38,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806313984] [2021-06-05 18:16:38,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:16:38,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:38,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:16:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:16:38,552 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) [2021-06-05 18:16:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:39,452 INFO L93 Difference]: Finished difference Result 113179 states and 302510 transitions. [2021-06-05 18:16:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:16:39,452 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 [2021-06-05 18:16:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:39,578 INFO L225 Difference]: With dead ends: 113179 [2021-06-05 18:16:39,578 INFO L226 Difference]: Without dead ends: 113179 [2021-06-05 18:16:39,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:16:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113179 states. [2021-06-05 18:16:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113179 to 88454. [2021-06-05 18:16:40,810 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) [2021-06-05 18:16:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88454 states to 88454 states and 238599 transitions. [2021-06-05 18:16:40,957 INFO L78 Accepts]: Start accepts. Automaton has 88454 states and 238599 transitions. Word has length 395 [2021-06-05 18:16:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:40,957 INFO L482 AbstractCegarLoop]: Abstraction has 88454 states and 238599 transitions. [2021-06-05 18:16:40,957 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) [2021-06-05 18:16:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 88454 states and 238599 transitions. [2021-06-05 18:16:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:41,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:41,053 INFO L554 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] [2021-06-05 18:16:41,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 18:16:41,254 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash -497589968, now seen corresponding path program 41 times [2021-06-05 18:16:41,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:41,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598038008] [2021-06-05 18:16:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:41,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:41,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598038008] [2021-06-05 18:16:41,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598038008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:41,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875155733] [2021-06-05 18:16:41,394 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 [2021-06-05 18:16:41,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:16:41,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:16:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875155733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:42,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469433641] [2021-06-05 18:16:42,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:42,083 INFO L87 Difference]: Start difference. First operand 88454 states and 238599 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:42,824 INFO L93 Difference]: Finished difference Result 117519 states and 312332 transitions. [2021-06-05 18:16:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:16:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:42,974 INFO L225 Difference]: With dead ends: 117519 [2021-06-05 18:16:42,974 INFO L226 Difference]: Without dead ends: 117519 [2021-06-05 18:16:42,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117519 states. [2021-06-05 18:16:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117519 to 82834. [2021-06-05 18:16:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82834 states, 82832 states have (on average 2.694707359474599) internal successors, (223208), 82833 states have internal predecessors, (223208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82834 states to 82834 states and 223208 transitions. [2021-06-05 18:16:44,440 INFO L78 Accepts]: Start accepts. Automaton has 82834 states and 223208 transitions. Word has length 419 [2021-06-05 18:16:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:44,441 INFO L482 AbstractCegarLoop]: Abstraction has 82834 states and 223208 transitions. [2021-06-05 18:16:44,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 82834 states and 223208 transitions. [2021-06-05 18:16:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:44,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:44,537 INFO L554 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] [2021-06-05 18:16:44,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:44,738 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:44,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1704364978, now seen corresponding path program 42 times [2021-06-05 18:16:44,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:44,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068066254] [2021-06-05 18:16:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:44,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068066254] [2021-06-05 18:16:44,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068066254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:44,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642939994] [2021-06-05 18:16:44,874 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 [2021-06-05 18:16:45,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:16:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:45,850 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:16:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:16:46,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642939994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:46,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:46,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:46,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624361206] [2021-06-05 18:16:46,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:46,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:46,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:46,008 INFO L87 Difference]: Start difference. First operand 82834 states and 223208 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:46,554 INFO L93 Difference]: Finished difference Result 131104 states and 350360 transitions. [2021-06-05 18:16:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:16:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:46,730 INFO L225 Difference]: With dead ends: 131104 [2021-06-05 18:16:46,730 INFO L226 Difference]: Without dead ends: 131104 [2021-06-05 18:16:46,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131104 states. [2021-06-05 18:16:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131104 to 84194. [2021-06-05 18:16:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84194 states, 84192 states have (on average 2.6960756366400607) internal successors, (226988), 84193 states have internal predecessors, (226988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84194 states to 84194 states and 226988 transitions. [2021-06-05 18:16:48,282 INFO L78 Accepts]: Start accepts. Automaton has 84194 states and 226988 transitions. Word has length 419 [2021-06-05 18:16:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:48,282 INFO L482 AbstractCegarLoop]: Abstraction has 84194 states and 226988 transitions. [2021-06-05 18:16:48,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 84194 states and 226988 transitions. [2021-06-05 18:16:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:48,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:48,381 INFO L554 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] [2021-06-05 18:16:48,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 18:16:48,582 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1815892244, now seen corresponding path program 43 times [2021-06-05 18:16:48,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:48,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084562420] [2021-06-05 18:16:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:49,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084562420] [2021-06-05 18:16:49,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084562420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618769924] [2021-06-05 18:16:49,016 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 [2021-06-05 18:16:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:16:49,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618769924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:49,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:49,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:49,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855196306] [2021-06-05 18:16:49,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:49,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:49,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:49,536 INFO L87 Difference]: Start difference. First operand 84194 states and 226988 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:50,072 INFO L93 Difference]: Finished difference Result 126124 states and 336922 transitions. [2021-06-05 18:16:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:16:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:16:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:50,243 INFO L225 Difference]: With dead ends: 126124 [2021-06-05 18:16:50,243 INFO L226 Difference]: Without dead ends: 126124 [2021-06-05 18:16:50,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:16:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126124 states. [2021-06-05 18:16:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126124 to 84874. [2021-06-05 18:16:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84872 states have (on average 2.696743331133943) internal successors, (228878), 84873 states have internal predecessors, (228878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 228878 transitions. [2021-06-05 18:16:51,935 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 228878 transitions. Word has length 419 [2021-06-05 18:16:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 84874 states and 228878 transitions. [2021-06-05 18:16:51,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 228878 transitions. [2021-06-05 18:16:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:52,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:52,025 INFO L554 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] [2021-06-05 18:16:52,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:16:52,225 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash 161927664, now seen corresponding path program 44 times [2021-06-05 18:16:52,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:52,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280963121] [2021-06-05 18:16:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:52,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280963121] [2021-06-05 18:16:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280963121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764698533] [2021-06-05 18:16:52,364 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 [2021-06-05 18:16:52,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:16:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:16:52,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764698533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:52,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:52,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:52,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713091701] [2021-06-05 18:16:52,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:52,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:52,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:52,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:52,893 INFO L87 Difference]: Start difference. First operand 84874 states and 228878 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:53,417 INFO L93 Difference]: Finished difference Result 125194 states and 334236 transitions. [2021-06-05 18:16:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:53,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:16:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:53,835 INFO L225 Difference]: With dead ends: 125194 [2021-06-05 18:16:53,835 INFO L226 Difference]: Without dead ends: 125194 [2021-06-05 18:16:53,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125194 states. [2021-06-05 18:16:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125194 to 86814. [2021-06-05 18:16:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86814 states, 86812 states have (on average 2.697979541998802) internal successors, (234217), 86813 states have internal predecessors, (234217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86814 states to 86814 states and 234217 transitions. [2021-06-05 18:16:55,217 INFO L78 Accepts]: Start accepts. Automaton has 86814 states and 234217 transitions. Word has length 419 [2021-06-05 18:16:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:55,217 INFO L482 AbstractCegarLoop]: Abstraction has 86814 states and 234217 transitions. [2021-06-05 18:16:55,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 86814 states and 234217 transitions. [2021-06-05 18:16:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:55,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:55,313 INFO L554 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] [2021-06-05 18:16:55,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:55,517 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 50400398, now seen corresponding path program 45 times [2021-06-05 18:16:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24985843] [2021-06-05 18:16:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:55,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:55,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24985843] [2021-06-05 18:16:55,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24985843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:55,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473804840] [2021-06-05 18:16:55,657 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 [2021-06-05 18:16:55,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:16:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:16:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:16:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:16:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:16:56,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473804840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:56,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:16:56,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:16:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029880516] [2021-06-05 18:16:56,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:16:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:16:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:16:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:16:56,411 INFO L87 Difference]: Start difference. First operand 86814 states and 234217 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:16:57,235 INFO L93 Difference]: Finished difference Result 146514 states and 393464 transitions. [2021-06-05 18:16:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:16:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:16:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:16:57,431 INFO L225 Difference]: With dead ends: 146514 [2021-06-05 18:16:57,432 INFO L226 Difference]: Without dead ends: 146514 [2021-06-05 18:16:57,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:16:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2021-06-05 18:16:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 89434. [2021-06-05 18:16:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89434 states, 89432 states have (on average 2.699771893729314) internal successors, (241446), 89433 states have internal predecessors, (241446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:16:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89434 states to 89434 states and 241446 transitions. [2021-06-05 18:16:59,089 INFO L78 Accepts]: Start accepts. Automaton has 89434 states and 241446 transitions. Word has length 419 [2021-06-05 18:16:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:16:59,089 INFO L482 AbstractCegarLoop]: Abstraction has 89434 states and 241446 transitions. [2021-06-05 18:16:59,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:16:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 89434 states and 241446 transitions. [2021-06-05 18:16:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:16:59,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:16:59,196 INFO L554 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] [2021-06-05 18:16:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:16:59,396 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:16:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:16:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 5141168, now seen corresponding path program 46 times [2021-06-05 18:16:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:16:59,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290292488] [2021-06-05 18:16:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:16:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:16:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:16:59,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:16:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290292488] [2021-06-05 18:16:59,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290292488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:16:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435561118] [2021-06-05 18:16:59,958 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 [2021-06-05 18:17:00,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1050 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:17:00,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435561118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:00,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:00,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-06-05 18:17:00,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458743412] [2021-06-05 18:17:00,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:00,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:00,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:00,814 INFO L87 Difference]: Start difference. First operand 89434 states and 241446 transitions. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:17:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:01,357 INFO L93 Difference]: Finished difference Result 123824 states and 331158 transitions. [2021-06-05 18:17:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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 419 [2021-06-05 18:17:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:01,514 INFO L225 Difference]: With dead ends: 123824 [2021-06-05 18:17:01,514 INFO L226 Difference]: Without dead ends: 123824 [2021-06-05 18:17:01,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123824 states. [2021-06-05 18:17:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123824 to 91374. [2021-06-05 18:17:03,112 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) [2021-06-05 18:17:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91374 states to 91374 states and 246785 transitions. [2021-06-05 18:17:03,255 INFO L78 Accepts]: Start accepts. Automaton has 91374 states and 246785 transitions. Word has length 419 [2021-06-05 18:17:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:03,255 INFO L482 AbstractCegarLoop]: Abstraction has 91374 states and 246785 transitions. [2021-06-05 18:17:03,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 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) [2021-06-05 18:17:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 91374 states and 246785 transitions. [2021-06-05 18:17:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:17:03,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:03,355 INFO L554 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] [2021-06-05 18:17:03,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:03,556 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -660651890, now seen corresponding path program 47 times [2021-06-05 18:17:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:03,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839938605] [2021-06-05 18:17:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:03,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839938605] [2021-06-05 18:17:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839938605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886187259] [2021-06-05 18:17:03,686 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 [2021-06-05 18:17:03,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:17:03,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886187259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:04,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:04,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:04,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999976896] [2021-06-05 18:17:04,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:04,309 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) [2021-06-05 18:17:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:04,816 INFO L93 Difference]: Finished difference Result 115689 states and 307540 transitions. [2021-06-05 18:17:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:04,816 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 [2021-06-05 18:17:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:05,225 INFO L225 Difference]: With dead ends: 115689 [2021-06-05 18:17:05,225 INFO L226 Difference]: Without dead ends: 115689 [2021-06-05 18:17:05,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:17:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115689 states. [2021-06-05 18:17:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115689 to 85754. [2021-06-05 18:17:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85754 states, 85752 states have (on average 2.6984093665453868) internal successors, (231394), 85753 states have internal predecessors, (231394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85754 states to 85754 states and 231394 transitions. [2021-06-05 18:17:06,634 INFO L78 Accepts]: Start accepts. Automaton has 85754 states and 231394 transitions. Word has length 419 [2021-06-05 18:17:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:06,635 INFO L482 AbstractCegarLoop]: Abstraction has 85754 states and 231394 transitions. [2021-06-05 18:17:06,635 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) [2021-06-05 18:17:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 85754 states and 231394 transitions. [2021-06-05 18:17:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:17:06,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:06,729 INFO L554 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] [2021-06-05 18:17:06,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 18:17:06,930 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -772179156, now seen corresponding path program 48 times [2021-06-05 18:17:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:06,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878867180] [2021-06-05 18:17:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:07,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:07,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878867180] [2021-06-05 18:17:07,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878867180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:07,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294849424] [2021-06-05 18:17:07,057 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 [2021-06-05 18:17:07,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:17:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294849424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:07,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:07,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951564410] [2021-06-05 18:17:07,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:07,832 INFO L87 Difference]: Start difference. First operand 85754 states and 231394 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) [2021-06-05 18:17:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:08,613 INFO L93 Difference]: Finished difference Result 132244 states and 353792 transitions. [2021-06-05 18:17:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:08,613 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 [2021-06-05 18:17:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:08,785 INFO L225 Difference]: With dead ends: 132244 [2021-06-05 18:17:08,786 INFO L226 Difference]: Without dead ends: 132244 [2021-06-05 18:17:08,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:17:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132244 states. [2021-06-05 18:17:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132244 to 88854. [2021-06-05 18:17:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88854 states, 88852 states have (on average 2.6998491874127764) internal successors, (239887), 88853 states have internal predecessors, (239887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88854 states to 88854 states and 239887 transitions. [2021-06-05 18:17:10,395 INFO L78 Accepts]: Start accepts. Automaton has 88854 states and 239887 transitions. Word has length 419 [2021-06-05 18:17:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:10,395 INFO L482 AbstractCegarLoop]: Abstraction has 88854 states and 239887 transitions. [2021-06-05 18:17:10,395 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) [2021-06-05 18:17:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 88854 states and 239887 transitions. [2021-06-05 18:17:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:17:10,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:10,497 INFO L554 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] [2021-06-05 18:17:10,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:10,698 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -817438386, now seen corresponding path program 49 times [2021-06-05 18:17:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:10,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236469086] [2021-06-05 18:17:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:10,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236469086] [2021-06-05 18:17:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236469086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935313016] [2021-06-05 18:17:10,823 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 [2021-06-05 18:17:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:11,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:11,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935313016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:11,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:11,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619074483] [2021-06-05 18:17:11,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:11,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:11,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:11,654 INFO L87 Difference]: Start difference. First operand 88854 states and 239887 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) [2021-06-05 18:17:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:12,197 INFO L93 Difference]: Finished difference Result 133754 states and 358185 transitions. [2021-06-05 18:17:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:12,197 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 [2021-06-05 18:17:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:12,367 INFO L225 Difference]: With dead ends: 133754 [2021-06-05 18:17:12,367 INFO L226 Difference]: Without dead ends: 133754 [2021-06-05 18:17:12,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:17:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133754 states. [2021-06-05 18:17:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133754 to 90114. [2021-06-05 18:17:14,018 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) [2021-06-05 18:17:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90114 states to 90114 states and 243336 transitions. [2021-06-05 18:17:14,163 INFO L78 Accepts]: Start accepts. Automaton has 90114 states and 243336 transitions. Word has length 419 [2021-06-05 18:17:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:14,164 INFO L482 AbstractCegarLoop]: Abstraction has 90114 states and 243336 transitions. [2021-06-05 18:17:14,164 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) [2021-06-05 18:17:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 90114 states and 243336 transitions. [2021-06-05 18:17:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-06-05 18:17:14,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:14,260 INFO L554 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] [2021-06-05 18:17:14,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 18:17:14,469 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1539942548, now seen corresponding path program 50 times [2021-06-05 18:17:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:14,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230609988] [2021-06-05 18:17:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:14,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230609988] [2021-06-05 18:17:14,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230609988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119494443] [2021-06-05 18:17:14,600 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 [2021-06-05 18:17:14,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:17:15,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119494443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:15,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:15,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236195060] [2021-06-05 18:17:15,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:15,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:15,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:15,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:15,140 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) [2021-06-05 18:17:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:15,971 INFO L93 Difference]: Finished difference Result 135089 states and 360890 transitions. [2021-06-05 18:17:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:15,972 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 [2021-06-05 18:17:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:16,124 INFO L225 Difference]: With dead ends: 135089 [2021-06-05 18:17:16,125 INFO L226 Difference]: Without dead ends: 135089 [2021-06-05 18:17:16,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135089 states. [2021-06-05 18:17:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135089 to 101354. [2021-06-05 18:17:17,660 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) [2021-06-05 18:17:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 274154 transitions. [2021-06-05 18:17:17,846 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 274154 transitions. Word has length 419 [2021-06-05 18:17:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:17,846 INFO L482 AbstractCegarLoop]: Abstraction has 101354 states and 274154 transitions. [2021-06-05 18:17:17,846 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) [2021-06-05 18:17:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 274154 transitions. [2021-06-05 18:17:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:17,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:17,980 INFO L554 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] [2021-06-05 18:17:18,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:18,180 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -546109501, now seen corresponding path program 51 times [2021-06-05 18:17:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:18,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316128078] [2021-06-05 18:17:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:18,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:18,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316128078] [2021-06-05 18:17:18,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316128078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:18,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265629409] [2021-06-05 18:17:18,348 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 [2021-06-05 18:17:18,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:17:18,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:19,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265629409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:19,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:19,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:19,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714324031] [2021-06-05 18:17:19,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:19,576 INFO L87 Difference]: Start difference. First operand 101354 states and 274154 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:20,155 INFO L93 Difference]: Finished difference Result 127459 states and 340229 transitions. [2021-06-05 18:17:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:20,327 INFO L225 Difference]: With dead ends: 127459 [2021-06-05 18:17:20,327 INFO L226 Difference]: Without dead ends: 127459 [2021-06-05 18:17:20,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127459 states. [2021-06-05 18:17:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127459 to 100674. [2021-06-05 18:17:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100674 states, 100672 states have (on average 2.7044659885568976) internal successors, (272264), 100673 states have internal predecessors, (272264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100674 states to 100674 states and 272264 transitions. [2021-06-05 18:17:22,231 INFO L78 Accepts]: Start accepts. Automaton has 100674 states and 272264 transitions. Word has length 424 [2021-06-05 18:17:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:22,231 INFO L482 AbstractCegarLoop]: Abstraction has 100674 states and 272264 transitions. [2021-06-05 18:17:22,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 100674 states and 272264 transitions. [2021-06-05 18:17:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:22,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:22,356 INFO L554 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] [2021-06-05 18:17:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:22,556 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -364387231, now seen corresponding path program 52 times [2021-06-05 18:17:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693082645] [2021-06-05 18:17:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:22,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693082645] [2021-06-05 18:17:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693082645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973917234] [2021-06-05 18:17:22,725 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 [2021-06-05 18:17:23,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:23,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:23,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973917234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:23,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:23,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:23,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050995171] [2021-06-05 18:17:23,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:23,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:23,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:23,571 INFO L87 Difference]: Start difference. First operand 100674 states and 272264 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:24,471 INFO L93 Difference]: Finished difference Result 141784 states and 379133 transitions. [2021-06-05 18:17:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:24,641 INFO L225 Difference]: With dead ends: 141784 [2021-06-05 18:17:24,642 INFO L226 Difference]: Without dead ends: 141784 [2021-06-05 18:17:24,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141784 states. [2021-06-05 18:17:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141784 to 100674. [2021-06-05 18:17:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100674 states, 100672 states have (on average 2.7044659885568976) internal successors, (272264), 100673 states have internal predecessors, (272264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100674 states to 100674 states and 272264 transitions. [2021-06-05 18:17:26,392 INFO L78 Accepts]: Start accepts. Automaton has 100674 states and 272264 transitions. Word has length 424 [2021-06-05 18:17:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:26,393 INFO L482 AbstractCegarLoop]: Abstraction has 100674 states and 272264 transitions. [2021-06-05 18:17:26,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 100674 states and 272264 transitions. [2021-06-05 18:17:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:26,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:26,516 INFO L554 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] [2021-06-05 18:17:26,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 18:17:26,719 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash 244271231, now seen corresponding path program 53 times [2021-06-05 18:17:26,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:26,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686260768] [2021-06-05 18:17:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:27,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686260768] [2021-06-05 18:17:27,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686260768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544564761] [2021-06-05 18:17:27,317 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 [2021-06-05 18:17:27,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:17:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:28,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544564761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:28,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:28,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:28,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128814214] [2021-06-05 18:17:28,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:28,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:28,001 INFO L87 Difference]: Start difference. First operand 100674 states and 272264 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:28,651 INFO L93 Difference]: Finished difference Result 138584 states and 371877 transitions. [2021-06-05 18:17:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:17:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:28,836 INFO L225 Difference]: With dead ends: 138584 [2021-06-05 18:17:28,836 INFO L226 Difference]: Without dead ends: 138584 [2021-06-05 18:17:28,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138584 states. [2021-06-05 18:17:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138584 to 102614. [2021-06-05 18:17:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102614 states, 102612 states have (on average 2.7053658441507817) internal successors, (277603), 102613 states have internal predecessors, (277603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102614 states to 102614 states and 277603 transitions. [2021-06-05 18:17:30,765 INFO L78 Accepts]: Start accepts. Automaton has 102614 states and 277603 transitions. Word has length 424 [2021-06-05 18:17:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:30,765 INFO L482 AbstractCegarLoop]: Abstraction has 102614 states and 277603 transitions. [2021-06-05 18:17:30,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 102614 states and 277603 transitions. [2021-06-05 18:17:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:30,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:30,891 INFO L554 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] [2021-06-05 18:17:31,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 18:17:31,092 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1707283485, now seen corresponding path program 54 times [2021-06-05 18:17:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719379292] [2021-06-05 18:17:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:31,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719379292] [2021-06-05 18:17:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719379292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:31,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561821947] [2021-06-05 18:17:31,259 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 [2021-06-05 18:17:31,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:17:31,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:32,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561821947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:32,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:32,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215343323] [2021-06-05 18:17:32,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:32,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:32,074 INFO L87 Difference]: Start difference. First operand 102614 states and 277603 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:33,021 INFO L93 Difference]: Finished difference Result 142859 states and 383220 transitions. [2021-06-05 18:17:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:17:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:33,206 INFO L225 Difference]: With dead ends: 142859 [2021-06-05 18:17:33,206 INFO L226 Difference]: Without dead ends: 142859 [2021-06-05 18:17:33,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:17:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142859 states. [2021-06-05 18:17:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142859 to 103294. [2021-06-05 18:17:34,868 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) [2021-06-05 18:17:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-06-05 18:17:35,363 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-06-05 18:17:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:35,363 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-06-05 18:17:35,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-06-05 18:17:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:35,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:35,488 INFO L554 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] [2021-06-05 18:17:35,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:35,693 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash 500508475, now seen corresponding path program 55 times [2021-06-05 18:17:35,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:35,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665001849] [2021-06-05 18:17:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:35,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665001849] [2021-06-05 18:17:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665001849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:35,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807095874] [2021-06-05 18:17:35,860 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 [2021-06-05 18:17:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:36,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807095874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:36,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572104425] [2021-06-05 18:17:36,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:36,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:36,396 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:37,336 INFO L93 Difference]: Finished difference Result 138014 states and 369856 transitions. [2021-06-05 18:17:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:17:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:37,604 INFO L225 Difference]: With dead ends: 138014 [2021-06-05 18:17:37,604 INFO L226 Difference]: Without dead ends: 138014 [2021-06-05 18:17:37,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:17:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138014 states. [2021-06-05 18:17:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138014 to 103974. [2021-06-05 18:17:39,081 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) [2021-06-05 18:17:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-06-05 18:17:39,269 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-06-05 18:17:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:39,270 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-06-05 18:17:39,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-06-05 18:17:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:39,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:39,401 INFO L554 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] [2021-06-05 18:17:39,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:17:39,602 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 388981209, now seen corresponding path program 56 times [2021-06-05 18:17:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:39,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340754964] [2021-06-05 18:17:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:17:39,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340754964] [2021-06-05 18:17:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340754964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188540261] [2021-06-05 18:17:39,770 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 [2021-06-05 18:17:39,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:39,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1316 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:17:40,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188540261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:40,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-06-05 18:17:40,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855877791] [2021-06-05 18:17:40,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:40,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:40,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:40,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:40,316 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:41,281 INFO L93 Difference]: Finished difference Result 134679 states and 360853 transitions. [2021-06-05 18:17:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:17:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:17:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:41,463 INFO L225 Difference]: With dead ends: 134679 [2021-06-05 18:17:41,463 INFO L226 Difference]: Without dead ends: 134679 [2021-06-05 18:17:41,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:17:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134679 states. [2021-06-05 18:17:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134679 to 103974. [2021-06-05 18:17:43,043 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) [2021-06-05 18:17:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-06-05 18:17:43,545 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-06-05 18:17:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:43,545 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-06-05 18:17:43,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.61904761904762) internal successors, (412), 21 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-06-05 18:17:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:43,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:43,666 INFO L554 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] [2021-06-05 18:17:43,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:17:43,866 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2030168195, now seen corresponding path program 57 times [2021-06-05 18:17:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:43,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735275379] [2021-06-05 18:17:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:44,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:44,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735275379] [2021-06-05 18:17:44,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735275379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003195720] [2021-06-05 18:17:44,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:17:44,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:17:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:44,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003195720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:44,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484973850] [2021-06-05 18:17:44,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:44,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:44,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:44,882 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) [2021-06-05 18:17:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:45,473 INFO L93 Difference]: Finished difference Result 133024 states and 354975 transitions. [2021-06-05 18:17:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:45,473 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 [2021-06-05 18:17:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:45,937 INFO L225 Difference]: With dead ends: 133024 [2021-06-05 18:17:45,937 INFO L226 Difference]: Without dead ends: 133024 [2021-06-05 18:17:45,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133024 states. [2021-06-05 18:17:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133024 to 98734. [2021-06-05 18:17:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98734 states, 98732 states have (on average 2.703530770165701) internal successors, (266925), 98733 states have internal predecessors, (266925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98734 states to 98734 states and 266925 transitions. [2021-06-05 18:17:47,501 INFO L78 Accepts]: Start accepts. Automaton has 98734 states and 266925 transitions. Word has length 424 [2021-06-05 18:17:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:47,502 INFO L482 AbstractCegarLoop]: Abstraction has 98734 states and 266925 transitions. [2021-06-05 18:17:47,502 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) [2021-06-05 18:17:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 98734 states and 266925 transitions. [2021-06-05 18:17:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:47,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:47,609 INFO L554 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] [2021-06-05 18:17:47,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 18:17:47,809 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1656140639, now seen corresponding path program 58 times [2021-06-05 18:17:47,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:47,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366945760] [2021-06-05 18:17:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:47,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366945760] [2021-06-05 18:17:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366945760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027208942] [2021-06-05 18:17:47,967 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 [2021-06-05 18:17:48,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027208942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:48,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:48,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68487042] [2021-06-05 18:17:48,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:48,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:48,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:48,929 INFO L87 Difference]: Start difference. First operand 98734 states and 266925 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) [2021-06-05 18:17:49,205 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-05 18:17:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,835 INFO L93 Difference]: Finished difference Result 152384 states and 408740 transitions. [2021-06-05 18:17:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:49,836 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 [2021-06-05 18:17:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:50,048 INFO L225 Difference]: With dead ends: 152384 [2021-06-05 18:17:50,049 INFO L226 Difference]: Without dead ends: 152384 [2021-06-05 18:17:50,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152384 states. [2021-06-05 18:17:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152384 to 99994. [2021-06-05 18:17:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99994 states, 99992 states have (on average 2.7039563165053204) internal successors, (270374), 99993 states have internal predecessors, (270374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99994 states to 99994 states and 270374 transitions. [2021-06-05 18:17:52,154 INFO L78 Accepts]: Start accepts. Automaton has 99994 states and 270374 transitions. Word has length 424 [2021-06-05 18:17:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:52,154 INFO L482 AbstractCegarLoop]: Abstraction has 99994 states and 270374 transitions. [2021-06-05 18:17:52,154 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) [2021-06-05 18:17:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 99994 states and 270374 transitions. [2021-06-05 18:17:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:52,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:52,266 INFO L554 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] [2021-06-05 18:17:52,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,467 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -193128385, now seen corresponding path program 59 times [2021-06-05 18:17:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:52,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830544354] [2021-06-05 18:17:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:52,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:52,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830544354] [2021-06-05 18:17:52,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830544354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610343406] [2021-06-05 18:17:52,629 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 [2021-06-05 18:17:52,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:17:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:53,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610343406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:53,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052668252] [2021-06-05 18:17:53,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:53,317 INFO L87 Difference]: Start difference. First operand 99994 states and 270374 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) [2021-06-05 18:17:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:54,218 INFO L93 Difference]: Finished difference Result 152579 states and 409589 transitions. [2021-06-05 18:17:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:17:54,219 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 [2021-06-05 18:17:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:54,422 INFO L225 Difference]: With dead ends: 152579 [2021-06-05 18:17:54,422 INFO L226 Difference]: Without dead ends: 152579 [2021-06-05 18:17:54,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=458, Invalid=1264, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:17:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152579 states. [2021-06-05 18:17:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152579 to 98734. [2021-06-05 18:17:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98734 states, 98732 states have (on average 2.703530770165701) internal successors, (266925), 98733 states have internal predecessors, (266925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98734 states to 98734 states and 266925 transitions. [2021-06-05 18:17:56,132 INFO L78 Accepts]: Start accepts. Automaton has 98734 states and 266925 transitions. Word has length 424 [2021-06-05 18:17:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:56,132 INFO L482 AbstractCegarLoop]: Abstraction has 98734 states and 266925 transitions. [2021-06-05 18:17:56,132 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) [2021-06-05 18:17:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 98734 states and 266925 transitions. [2021-06-05 18:17:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:17:56,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:56,237 INFO L554 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] [2021-06-05 18:17:56,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 18:17:56,437 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:56,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1399903395, now seen corresponding path program 60 times [2021-06-05 18:17:56,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:56,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41393997] [2021-06-05 18:17:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:56,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:56,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41393997] [2021-06-05 18:17:56,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41393997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969284295] [2021-06-05 18:17:56,592 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 [2021-06-05 18:17:57,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:17:57,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:57,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:17:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:17:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969284295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:57,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:17:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522979975] [2021-06-05 18:17:57,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:17:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:17:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:57,793 INFO L87 Difference]: Start difference. First operand 98734 states and 266925 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) [2021-06-05 18:17:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:58,451 INFO L93 Difference]: Finished difference Result 147444 states and 395135 transitions. [2021-06-05 18:17:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:17:58,452 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 [2021-06-05 18:17:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:58,641 INFO L225 Difference]: With dead ends: 147444 [2021-06-05 18:17:58,642 INFO L226 Difference]: Without dead ends: 147444 [2021-06-05 18:17:58,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:17:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147444 states. [2021-06-05 18:18:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147444 to 99414. [2021-06-05 18:18:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99414 states, 99412 states have (on average 2.704049812899851) internal successors, (268815), 99413 states have internal predecessors, (268815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99414 states to 99414 states and 268815 transitions. [2021-06-05 18:18:00,564 INFO L78 Accepts]: Start accepts. Automaton has 99414 states and 268815 transitions. Word has length 424 [2021-06-05 18:18:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:00,564 INFO L482 AbstractCegarLoop]: Abstraction has 99414 states and 268815 transitions. [2021-06-05 18:18:00,564 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) [2021-06-05 18:18:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 99414 states and 268815 transitions. [2021-06-05 18:18:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:00,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:00,684 INFO L554 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] [2021-06-05 18:18:00,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:18:00,884 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1511430661, now seen corresponding path program 61 times [2021-06-05 18:18:00,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:00,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814187514] [2021-06-05 18:18:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:01,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:01,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814187514] [2021-06-05 18:18:01,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814187514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813665531] [2021-06-05 18:18:01,036 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 [2021-06-05 18:18:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813665531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:01,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747668509] [2021-06-05 18:18:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:01,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:01,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:01,578 INFO L87 Difference]: Start difference. First operand 99414 states and 268815 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) [2021-06-05 18:18:02,114 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 18:18:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:02,468 INFO L93 Difference]: Finished difference Result 141899 states and 379742 transitions. [2021-06-05 18:18:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:02,469 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 [2021-06-05 18:18:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:02,642 INFO L225 Difference]: With dead ends: 141899 [2021-06-05 18:18:02,642 INFO L226 Difference]: Without dead ends: 141899 [2021-06-05 18:18:02,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141899 states. [2021-06-05 18:18:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141899 to 98054. [2021-06-05 18:18:04,154 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) [2021-06-05 18:18:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98054 states to 98054 states and 265035 transitions. [2021-06-05 18:18:04,335 INFO L78 Accepts]: Start accepts. Automaton has 98054 states and 265035 transitions. Word has length 424 [2021-06-05 18:18:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:04,336 INFO L482 AbstractCegarLoop]: Abstraction has 98054 states and 265035 transitions. [2021-06-05 18:18:04,336 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) [2021-06-05 18:18:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 98054 states and 265035 transitions. [2021-06-05 18:18:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:04,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:04,793 INFO L554 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] [2021-06-05 18:18:05,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 18:18:05,009 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash 348453187, now seen corresponding path program 62 times [2021-06-05 18:18:05,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:05,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620654001] [2021-06-05 18:18:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:05,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:05,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620654001] [2021-06-05 18:18:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620654001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69259157] [2021-06-05 18:18:05,161 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 [2021-06-05 18:18:05,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:05,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69259157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:05,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68416935] [2021-06-05 18:18:05,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:05,719 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) [2021-06-05 18:18:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:06,342 INFO L93 Difference]: Finished difference Result 131684 states and 352100 transitions. [2021-06-05 18:18:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:06,343 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 [2021-06-05 18:18:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:06,516 INFO L225 Difference]: With dead ends: 131684 [2021-06-05 18:18:06,516 INFO L226 Difference]: Without dead ends: 131684 [2021-06-05 18:18:06,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131684 states. [2021-06-05 18:18:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131684 to 96594. [2021-06-05 18:18:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96594 states, 96592 states have (on average 2.701673016398874) internal successors, (260960), 96593 states have internal predecessors, (260960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96594 states to 96594 states and 260960 transitions. [2021-06-05 18:18:08,389 INFO L78 Accepts]: Start accepts. Automaton has 96594 states and 260960 transitions. Word has length 424 [2021-06-05 18:18:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:08,389 INFO L482 AbstractCegarLoop]: Abstraction has 96594 states and 260960 transitions. [2021-06-05 18:18:08,389 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) [2021-06-05 18:18:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 96594 states and 260960 transitions. [2021-06-05 18:18:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:08,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:08,499 INFO L554 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] [2021-06-05 18:18:08,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,699 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1811465441, now seen corresponding path program 63 times [2021-06-05 18:18:08,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:08,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41468302] [2021-06-05 18:18:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:08,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:08,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41468302] [2021-06-05 18:18:08,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41468302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:08,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186334135] [2021-06-05 18:18:08,851 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 [2021-06-05 18:18:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:18:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:09,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186334135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:09,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:09,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663596437] [2021-06-05 18:18:09,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:09,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:09,682 INFO L87 Difference]: Start difference. First operand 96594 states and 260960 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) [2021-06-05 18:18:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:10,668 INFO L93 Difference]: Finished difference Result 175139 states and 471400 transitions. [2021-06-05 18:18:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:10,669 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 [2021-06-05 18:18:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:10,894 INFO L225 Difference]: With dead ends: 175139 [2021-06-05 18:18:10,894 INFO L226 Difference]: Without dead ends: 175139 [2021-06-05 18:18:10,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175139 states. [2021-06-05 18:18:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175139 to 101734. [2021-06-05 18:18:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101734 states, 101732 states have (on average 2.704036094837416) internal successors, (275087), 101733 states have internal predecessors, (275087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101734 states to 101734 states and 275087 transitions. [2021-06-05 18:18:13,111 INFO L78 Accepts]: Start accepts. Automaton has 101734 states and 275087 transitions. Word has length 424 [2021-06-05 18:18:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:13,112 INFO L482 AbstractCegarLoop]: Abstraction has 101734 states and 275087 transitions. [2021-06-05 18:18:13,112 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) [2021-06-05 18:18:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 101734 states and 275087 transitions. [2021-06-05 18:18:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:13,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:13,239 INFO L554 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] [2021-06-05 18:18:13,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,439 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 604690431, now seen corresponding path program 64 times [2021-06-05 18:18:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:13,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224592273] [2021-06-05 18:18:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:13,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:13,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224592273] [2021-06-05 18:18:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224592273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599580798] [2021-06-05 18:18:13,590 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 [2021-06-05 18:18:14,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:14,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:14,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599580798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:14,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040640184] [2021-06-05 18:18:14,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:14,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:14,452 INFO L87 Difference]: Start difference. First operand 101734 states and 275087 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) [2021-06-05 18:18:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:15,460 INFO L93 Difference]: Finished difference Result 173024 states and 465877 transitions. [2021-06-05 18:18:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:15,460 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 [2021-06-05 18:18:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:15,675 INFO L225 Difference]: With dead ends: 173024 [2021-06-05 18:18:15,675 INFO L226 Difference]: Without dead ends: 173024 [2021-06-05 18:18:15,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1337, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173024 states. [2021-06-05 18:18:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173024 to 105034. [2021-06-05 18:18:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105034 states, 105032 states have (on average 2.7058991545433773) internal successors, (284206), 105033 states have internal predecessors, (284206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105034 states to 105034 states and 284206 transitions. [2021-06-05 18:18:17,885 INFO L78 Accepts]: Start accepts. Automaton has 105034 states and 284206 transitions. Word has length 424 [2021-06-05 18:18:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:17,886 INFO L482 AbstractCegarLoop]: Abstraction has 105034 states and 284206 transitions. [2021-06-05 18:18:17,886 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) [2021-06-05 18:18:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 105034 states and 284206 transitions. [2021-06-05 18:18:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:18,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:18,030 INFO L554 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] [2021-06-05 18:18:18,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,230 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 493163165, now seen corresponding path program 65 times [2021-06-05 18:18:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:18,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931215237] [2021-06-05 18:18:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:18,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:18,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931215237] [2021-06-05 18:18:18,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931215237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795083453] [2021-06-05 18:18:18,384 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 [2021-06-05 18:18:18,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:18:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795083453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:19,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82535283] [2021-06-05 18:18:19,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:19,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:19,187 INFO L87 Difference]: Start difference. First operand 105034 states and 284206 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) [2021-06-05 18:18:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:20,177 INFO L93 Difference]: Finished difference Result 161559 states and 434096 transitions. [2021-06-05 18:18:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:20,178 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 [2021-06-05 18:18:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:20,362 INFO L225 Difference]: With dead ends: 161559 [2021-06-05 18:18:20,362 INFO L226 Difference]: Without dead ends: 161559 [2021-06-05 18:18:20,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161559 states. [2021-06-05 18:18:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161559 to 104354. [2021-06-05 18:18:21,918 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) [2021-06-05 18:18:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104354 states to 104354 states and 282316 transitions. [2021-06-05 18:18:22,103 INFO L78 Accepts]: Start accepts. Automaton has 104354 states and 282316 transitions. Word has length 424 [2021-06-05 18:18:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:22,103 INFO L482 AbstractCegarLoop]: Abstraction has 104354 states and 282316 transitions. [2021-06-05 18:18:22,103 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) [2021-06-05 18:18:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 104354 states and 282316 transitions. [2021-06-05 18:18:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:22,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:22,234 INFO L554 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] [2021-06-05 18:18:22,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 18:18:22,435 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1631045117, now seen corresponding path program 66 times [2021-06-05 18:18:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747798439] [2021-06-05 18:18:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747798439] [2021-06-05 18:18:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747798439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689824332] [2021-06-05 18:18:22,590 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 [2021-06-05 18:18:23,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:18:23,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689824332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:23,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542239673] [2021-06-05 18:18:23,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:23,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:23,826 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) [2021-06-05 18:18:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:24,452 INFO L93 Difference]: Finished difference Result 139429 states and 373186 transitions. [2021-06-05 18:18:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:24,453 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 [2021-06-05 18:18:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:24,634 INFO L225 Difference]: With dead ends: 139429 [2021-06-05 18:18:24,634 INFO L226 Difference]: Without dead ends: 139429 [2021-06-05 18:18:24,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=472, Invalid=1334, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139429 states. [2021-06-05 18:18:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139429 to 102894. [2021-06-05 18:18:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102894 states, 102892 states have (on average 2.704204408506006) internal successors, (278241), 102893 states have internal predecessors, (278241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102894 states to 102894 states and 278241 transitions. [2021-06-05 18:18:26,641 INFO L78 Accepts]: Start accepts. Automaton has 102894 states and 278241 transitions. Word has length 424 [2021-06-05 18:18:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:26,641 INFO L482 AbstractCegarLoop]: Abstraction has 102894 states and 278241 transitions. [2021-06-05 18:18:26,642 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) [2021-06-05 18:18:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 102894 states and 278241 transitions. [2021-06-05 18:18:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:26,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:26,770 INFO L554 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] [2021-06-05 18:18:26,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:18:26,970 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1457147169, now seen corresponding path program 67 times [2021-06-05 18:18:26,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:26,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232396794] [2021-06-05 18:18:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:27,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232396794] [2021-06-05 18:18:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232396794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720143822] [2021-06-05 18:18:27,117 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 [2021-06-05 18:18:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:27,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720143822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:27,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:27,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908554763] [2021-06-05 18:18:27,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:27,699 INFO L87 Difference]: Start difference. First operand 102894 states and 278241 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) [2021-06-05 18:18:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:28,746 INFO L93 Difference]: Finished difference Result 191454 states and 515998 transitions. [2021-06-05 18:18:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:28,747 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 [2021-06-05 18:18:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:29,004 INFO L225 Difference]: With dead ends: 191454 [2021-06-05 18:18:29,004 INFO L226 Difference]: Without dead ends: 191454 [2021-06-05 18:18:29,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1336, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191454 states. [2021-06-05 18:18:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191454 to 107454. [2021-06-05 18:18:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107454 states, 107452 states have (on average 2.7064084428395936) internal successors, (290809), 107453 states have internal predecessors, (290809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107454 states to 107454 states and 290809 transitions. [2021-06-05 18:18:31,240 INFO L78 Accepts]: Start accepts. Automaton has 107454 states and 290809 transitions. Word has length 424 [2021-06-05 18:18:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:31,240 INFO L482 AbstractCegarLoop]: Abstraction has 107454 states and 290809 transitions. [2021-06-05 18:18:31,241 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) [2021-06-05 18:18:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 107454 states and 290809 transitions. [2021-06-05 18:18:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:31,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:31,366 INFO L554 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] [2021-06-05 18:18:31,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:18:31,567 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:31,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1345619903, now seen corresponding path program 68 times [2021-06-05 18:18:31,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:31,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458656881] [2021-06-05 18:18:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:31,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458656881] [2021-06-05 18:18:31,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458656881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652603961] [2021-06-05 18:18:31,723 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 [2021-06-05 18:18:31,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:31,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:32,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652603961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:32,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:32,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:32,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637465049] [2021-06-05 18:18:32,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:32,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:32,294 INFO L87 Difference]: Start difference. First operand 107454 states and 290809 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) [2021-06-05 18:18:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:33,333 INFO L93 Difference]: Finished difference Result 180589 states and 486060 transitions. [2021-06-05 18:18:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:33,333 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 [2021-06-05 18:18:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:33,576 INFO L225 Difference]: With dead ends: 180589 [2021-06-05 18:18:33,576 INFO L226 Difference]: Without dead ends: 180589 [2021-06-05 18:18:33,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180589 states. [2021-06-05 18:18:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180589 to 109394. [2021-06-05 18:18:35,733 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) [2021-06-05 18:18:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109394 states to 109394 states and 296148 transitions. [2021-06-05 18:18:35,920 INFO L78 Accepts]: Start accepts. Automaton has 109394 states and 296148 transitions. Word has length 424 [2021-06-05 18:18:35,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:35,920 INFO L482 AbstractCegarLoop]: Abstraction has 109394 states and 296148 transitions. [2021-06-05 18:18:35,920 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) [2021-06-05 18:18:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 109394 states and 296148 transitions. [2021-06-05 18:18:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:36,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:36,050 INFO L554 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] [2021-06-05 18:18:36,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:18:36,250 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:36,250 INFO L82 PathProgramCache]: Analyzing trace with hash -971527485, now seen corresponding path program 69 times [2021-06-05 18:18:36,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:36,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355203377] [2021-06-05 18:18:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:36,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:36,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355203377] [2021-06-05 18:18:36,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355203377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773764957] [2021-06-05 18:18:36,400 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 [2021-06-05 18:18:36,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:18:36,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:37,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773764957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:37,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:37,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24984626] [2021-06-05 18:18:37,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:37,206 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) [2021-06-05 18:18:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:38,312 INFO L93 Difference]: Finished difference Result 143694 states and 385031 transitions. [2021-06-05 18:18:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:38,313 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 [2021-06-05 18:18:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:38,506 INFO L225 Difference]: With dead ends: 143694 [2021-06-05 18:18:38,506 INFO L226 Difference]: Without dead ends: 143694 [2021-06-05 18:18:38,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143694 states. [2021-06-05 18:18:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143694 to 110654. [2021-06-05 18:18:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110654 states, 110652 states have (on average 2.707560640566822) internal successors, (299597), 110653 states have internal predecessors, (299597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110654 states to 110654 states and 299597 transitions. [2021-06-05 18:18:40,362 INFO L78 Accepts]: Start accepts. Automaton has 110654 states and 299597 transitions. Word has length 424 [2021-06-05 18:18:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:40,362 INFO L482 AbstractCegarLoop]: Abstraction has 110654 states and 299597 transitions. [2021-06-05 18:18:40,362 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) [2021-06-05 18:18:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 110654 states and 299597 transitions. [2021-06-05 18:18:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:40,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:40,495 INFO L554 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] [2021-06-05 18:18:40,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 18:18:40,697 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1083054751, now seen corresponding path program 70 times [2021-06-05 18:18:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:40,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071082963] [2021-06-05 18:18:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:41,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071082963] [2021-06-05 18:18:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071082963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203014121] [2021-06-05 18:18:41,287 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 [2021-06-05 18:18:41,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:41,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203014121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:41,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:41,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690956430] [2021-06-05 18:18:41,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:41,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:41,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:41,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:41,926 INFO L87 Difference]: Start difference. First operand 110654 states and 299597 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) [2021-06-05 18:18:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:42,641 INFO L93 Difference]: Finished difference Result 188659 states and 508100 transitions. [2021-06-05 18:18:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:42,641 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 [2021-06-05 18:18:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:42,874 INFO L225 Difference]: With dead ends: 188659 [2021-06-05 18:18:42,874 INFO L226 Difference]: Without dead ends: 188659 [2021-06-05 18:18:42,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188659 states. [2021-06-05 18:18:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188659 to 113274. [2021-06-05 18:18:44,956 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) [2021-06-05 18:18:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113274 states to 113274 states and 306826 transitions. [2021-06-05 18:18:45,161 INFO L78 Accepts]: Start accepts. Automaton has 113274 states and 306826 transitions. Word has length 424 [2021-06-05 18:18:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:45,162 INFO L482 AbstractCegarLoop]: Abstraction has 113274 states and 306826 transitions. [2021-06-05 18:18:45,162 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) [2021-06-05 18:18:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 113274 states and 306826 transitions. [2021-06-05 18:18:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-06-05 18:18:45,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:45,648 INFO L554 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] [2021-06-05 18:18:45,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:45,866 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1128313981, now seen corresponding path program 71 times [2021-06-05 18:18:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:45,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703454594] [2021-06-05 18:18:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:46,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:46,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703454594] [2021-06-05 18:18:46,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703454594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466041142] [2021-06-05 18:18:46,014 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 [2021-06-05 18:18:46,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:18:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:46,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:18:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466041142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:46,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364999224] [2021-06-05 18:18:46,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:46,676 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) [2021-06-05 18:18:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:47,317 INFO L93 Difference]: Finished difference Result 144324 states and 386976 transitions. [2021-06-05 18:18:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:47,317 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 [2021-06-05 18:18:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:47,503 INFO L225 Difference]: With dead ends: 144324 [2021-06-05 18:18:47,503 INFO L226 Difference]: Without dead ends: 144324 [2021-06-05 18:18:47,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144324 states. [2021-06-05 18:18:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144324 to 115214. [2021-06-05 18:18:49,363 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) [2021-06-05 18:18:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115214 states to 115214 states and 312165 transitions. [2021-06-05 18:18:49,569 INFO L78 Accepts]: Start accepts. Automaton has 115214 states and 312165 transitions. Word has length 424 [2021-06-05 18:18:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:49,569 INFO L482 AbstractCegarLoop]: Abstraction has 115214 states and 312165 transitions. [2021-06-05 18:18:49,569 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) [2021-06-05 18:18:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 115214 states and 312165 transitions. [2021-06-05 18:18:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-06-05 18:18:49,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:49,708 INFO L554 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] [2021-06-05 18:18:49,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:18:49,910 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:49,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1370718820, now seen corresponding path program 11 times [2021-06-05 18:18:49,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:49,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668460429] [2021-06-05 18:18:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:50,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:50,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668460429] [2021-06-05 18:18:50,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668460429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:50,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879681182] [2021-06-05 18:18:50,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:18:50,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:18:50,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:50,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879681182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:51,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 18:18:51,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656824009] [2021-06-05 18:18:51,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:18:51,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:18:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:18:51,367 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) [2021-06-05 18:18:52,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:52,067 INFO L93 Difference]: Finished difference Result 127423 states and 343370 transitions. [2021-06-05 18:18:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:18:52,067 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 [2021-06-05 18:18:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:52,228 INFO L225 Difference]: With dead ends: 127423 [2021-06-05 18:18:52,228 INFO L226 Difference]: Without dead ends: 127423 [2021-06-05 18:18:52,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=841, Invalid=1709, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:18:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2021-06-05 18:18:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 117696. [2021-06-05 18:18:53,999 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) [2021-06-05 18:18:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-06-05 18:18:54,208 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 428 [2021-06-05 18:18:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:54,208 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-06-05 18:18:54,208 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) [2021-06-05 18:18:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-06-05 18:18:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:18:54,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:54,347 INFO L554 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] [2021-06-05 18:18:54,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:54,547 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:54,548 INFO L82 PathProgramCache]: Analyzing trace with hash 508400118, now seen corresponding path program 35 times [2021-06-05 18:18:54,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:54,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816682125] [2021-06-05 18:18:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1669 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:18:54,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816682125] [2021-06-05 18:18:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816682125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321667778] [2021-06-05 18:18:54,749 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 [2021-06-05 18:18:55,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:18:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:55,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:18:55,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321667778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:55,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-06-05 18:18:55,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626421622] [2021-06-05 18:18:55,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:18:55,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:18:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:18:55,564 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) [2021-06-05 18:18:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:56,540 INFO L93 Difference]: Finished difference Result 134006 states and 360130 transitions. [2021-06-05 18:18:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:56,540 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 [2021-06-05 18:18:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:56,715 INFO L225 Difference]: With dead ends: 134006 [2021-06-05 18:18:56,716 INFO L226 Difference]: Without dead ends: 134006 [2021-06-05 18:18:56,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134006 states. [2021-06-05 18:18:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134006 to 118376. [2021-06-05 18:18:58,382 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) [2021-06-05 18:18:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118376 states to 118376 states and 320555 transitions. [2021-06-05 18:18:58,895 INFO L78 Accepts]: Start accepts. Automaton has 118376 states and 320555 transitions. Word has length 429 [2021-06-05 18:18:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:58,895 INFO L482 AbstractCegarLoop]: Abstraction has 118376 states and 320555 transitions. [2021-06-05 18:18:58,895 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) [2021-06-05 18:18:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 118376 states and 320555 transitions. [2021-06-05 18:18:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:18:59,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:59,026 INFO L554 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] [2021-06-05 18:18:59,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:59,227 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1794512916, now seen corresponding path program 36 times [2021-06-05 18:18:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:59,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951338332] [2021-06-05 18:18:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:18:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951338332] [2021-06-05 18:18:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951338332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351939059] [2021-06-05 18:18:59,412 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 [2021-06-05 18:18:59,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:18:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:00,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351939059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:00,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388435905] [2021-06-05 18:19:00,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:00,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:00,223 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) [2021-06-05 18:19:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:01,143 INFO L93 Difference]: Finished difference Result 141701 states and 379687 transitions. [2021-06-05 18:19:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:01,143 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 [2021-06-05 18:19:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:01,315 INFO L225 Difference]: With dead ends: 141701 [2021-06-05 18:19:01,315 INFO L226 Difference]: Without dead ends: 141701 [2021-06-05 18:19:01,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141701 states. [2021-06-05 18:19:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141701 to 117696. [2021-06-05 18:19:02,916 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) [2021-06-05 18:19:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-06-05 18:19:03,121 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 429 [2021-06-05 18:19:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:03,121 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-06-05 18:19:03,121 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) [2021-06-05 18:19:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-06-05 18:19:03,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:03,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:03,632 INFO L554 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] [2021-06-05 18:19:03,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 18:19:03,838 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1400079794, now seen corresponding path program 37 times [2021-06-05 18:19:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:03,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738974474] [2021-06-05 18:19:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:04,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738974474] [2021-06-05 18:19:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738974474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68668496] [2021-06-05 18:19:04,030 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 [2021-06-05 18:19:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:04,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68668496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:04,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:04,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003119911] [2021-06-05 18:19:04,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:04,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:04,581 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) [2021-06-05 18:19:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:05,275 INFO L93 Difference]: Finished difference Result 143841 states and 386037 transitions. [2021-06-05 18:19:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:05,275 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 [2021-06-05 18:19:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:05,745 INFO L225 Difference]: With dead ends: 143841 [2021-06-05 18:19:05,745 INFO L226 Difference]: Without dead ends: 143841 [2021-06-05 18:19:05,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=639, Invalid=1523, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143841 states. [2021-06-05 18:19:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143841 to 117016. [2021-06-05 18:19:07,264 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) [2021-06-05 18:19:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117016 states to 117016 states and 316775 transitions. [2021-06-05 18:19:07,482 INFO L78 Accepts]: Start accepts. Automaton has 117016 states and 316775 transitions. Word has length 429 [2021-06-05 18:19:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:07,482 INFO L482 AbstractCegarLoop]: Abstraction has 117016 states and 316775 transitions. [2021-06-05 18:19:07,482 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) [2021-06-05 18:19:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 117016 states and 316775 transitions. [2021-06-05 18:19:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:07,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:07,625 INFO L554 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] [2021-06-05 18:19:07,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:07,825 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1742191312, now seen corresponding path program 38 times [2021-06-05 18:19:07,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:07,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968373329] [2021-06-05 18:19:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:08,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968373329] [2021-06-05 18:19:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968373329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172183562] [2021-06-05 18:19:08,389 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 [2021-06-05 18:19:08,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172183562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:09,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596179971] [2021-06-05 18:19:09,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:09,013 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) [2021-06-05 18:19:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:09,717 INFO L93 Difference]: Finished difference Result 148126 states and 396802 transitions. [2021-06-05 18:19:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:09,718 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 [2021-06-05 18:19:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:09,915 INFO L225 Difference]: With dead ends: 148126 [2021-06-05 18:19:09,916 INFO L226 Difference]: Without dead ends: 148126 [2021-06-05 18:19:09,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=651, Invalid=1605, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148126 states. [2021-06-05 18:19:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148126 to 115656. [2021-06-05 18:19:11,799 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) [2021-06-05 18:19:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 312995 transitions. [2021-06-05 18:19:11,999 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 312995 transitions. Word has length 429 [2021-06-05 18:19:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:11,999 INFO L482 AbstractCegarLoop]: Abstraction has 115656 states and 312995 transitions. [2021-06-05 18:19:11,999 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) [2021-06-05 18:19:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 312995 transitions. [2021-06-05 18:19:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:12,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,137 INFO L554 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] [2021-06-05 18:19:12,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,338 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1923913582, now seen corresponding path program 39 times [2021-06-05 18:19:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142796942] [2021-06-05 18:19:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:12,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142796942] [2021-06-05 18:19:12,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142796942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355630126] [2021-06-05 18:19:12,522 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 [2021-06-05 18:19:12,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:19:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355630126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:13,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088548556] [2021-06-05 18:19:13,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:13,706 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) [2021-06-05 18:19:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,399 INFO L93 Difference]: Finished difference Result 152051 states and 406986 transitions. [2021-06-05 18:19:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:14,400 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 [2021-06-05 18:19:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:14,600 INFO L225 Difference]: With dead ends: 152051 [2021-06-05 18:19:14,600 INFO L226 Difference]: Without dead ends: 152051 [2021-06-05 18:19:14,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152051 states. [2021-06-05 18:19:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152051 to 116236. [2021-06-05 18:19:16,594 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) [2021-06-05 18:19:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116236 states to 116236 states and 314554 transitions. [2021-06-05 18:19:16,791 INFO L78 Accepts]: Start accepts. Automaton has 116236 states and 314554 transitions. Word has length 429 [2021-06-05 18:19:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:16,792 INFO L482 AbstractCegarLoop]: Abstraction has 116236 states and 314554 transitions. [2021-06-05 18:19:16,792 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) [2021-06-05 18:19:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 116236 states and 314554 transitions. [2021-06-05 18:19:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:16,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:16,930 INFO L554 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] [2021-06-05 18:19:17,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:19:17,139 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1762395252, now seen corresponding path program 40 times [2021-06-05 18:19:17,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:17,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742646136] [2021-06-05 18:19:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:17,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:17,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742646136] [2021-06-05 18:19:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742646136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9051223] [2021-06-05 18:19:17,323 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 [2021-06-05 18:19:17,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:17,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:17,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:18,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9051223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:18,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:18,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519480354] [2021-06-05 18:19:18,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:18,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:18,614 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) [2021-06-05 18:19:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:19,352 INFO L93 Difference]: Finished difference Result 153516 states and 410830 transitions. [2021-06-05 18:19:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:19,352 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 [2021-06-05 18:19:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:19,549 INFO L225 Difference]: With dead ends: 153516 [2021-06-05 18:19:19,549 INFO L226 Difference]: Without dead ends: 153516 [2021-06-05 18:19:19,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=675, Invalid=1775, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153516 states. [2021-06-05 18:19:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153516 to 114976. [2021-06-05 18:19:21,467 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) [2021-06-05 18:19:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114976 states to 114976 states and 311105 transitions. [2021-06-05 18:19:21,655 INFO L78 Accepts]: Start accepts. Automaton has 114976 states and 311105 transitions. Word has length 429 [2021-06-05 18:19:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:21,655 INFO L482 AbstractCegarLoop]: Abstraction has 114976 states and 311105 transitions. [2021-06-05 18:19:21,655 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) [2021-06-05 18:19:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 114976 states and 311105 transitions. [2021-06-05 18:19:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:21,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:21,792 INFO L554 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] [2021-06-05 18:19:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:21,992 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -299382998, now seen corresponding path program 41 times [2021-06-05 18:19:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512777203] [2021-06-05 18:19:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:22,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:22,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512777203] [2021-06-05 18:19:22,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512777203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297506372] [2021-06-05 18:19:22,175 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 [2021-06-05 18:19:22,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:19:22,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:23,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297506372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:23,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:23,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730318386] [2021-06-05 18:19:23,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:23,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:23,008 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) [2021-06-05 18:19:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:24,029 INFO L93 Difference]: Finished difference Result 152841 states and 409174 transitions. [2021-06-05 18:19:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:24,030 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 [2021-06-05 18:19:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:24,221 INFO L225 Difference]: With dead ends: 152841 [2021-06-05 18:19:24,221 INFO L226 Difference]: Without dead ends: 152841 [2021-06-05 18:19:24,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 661.9ms TimeCoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152841 states. [2021-06-05 18:19:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152841 to 113716. [2021-06-05 18:19:26,215 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) [2021-06-05 18:19:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-06-05 18:19:26,396 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-06-05 18:19:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:26,396 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-06-05 18:19:26,396 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) [2021-06-05 18:19:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-06-05 18:19:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:26,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:26,520 INFO L554 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] [2021-06-05 18:19:26,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:19:26,721 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1506158008, now seen corresponding path program 42 times [2021-06-05 18:19:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:26,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314447073] [2021-06-05 18:19:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:26,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314447073] [2021-06-05 18:19:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314447073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251285805] [2021-06-05 18:19:26,901 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 [2021-06-05 18:19:27,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:19:27,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:27,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251285805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:27,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040492327] [2021-06-05 18:19:27,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:27,784 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) [2021-06-05 18:19:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:28,776 INFO L93 Difference]: Finished difference Result 147066 states and 393838 transitions. [2021-06-05 18:19:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:28,777 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 [2021-06-05 18:19:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:28,951 INFO L225 Difference]: With dead ends: 147066 [2021-06-05 18:19:28,951 INFO L226 Difference]: Without dead ends: 147066 [2021-06-05 18:19:28,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147066 states. [2021-06-05 18:19:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147066 to 113716. [2021-06-05 18:19:30,544 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) [2021-06-05 18:19:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-06-05 18:19:30,736 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-06-05 18:19:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:30,736 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-06-05 18:19:30,736 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) [2021-06-05 18:19:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-06-05 18:19:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-06-05 18:19:31,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,199 INFO L554 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] [2021-06-05 18:19:31,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:31,418 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1617685274, now seen corresponding path program 43 times [2021-06-05 18:19:31,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:31,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150997506] [2021-06-05 18:19:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:31,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:31,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150997506] [2021-06-05 18:19:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150997506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505179845] [2021-06-05 18:19:31,610 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 [2021-06-05 18:19:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:19:32,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505179845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:32,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:32,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455017675] [2021-06-05 18:19:32,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:32,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:32,164 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) [2021-06-05 18:19:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:32,917 INFO L93 Difference]: Finished difference Result 141826 states and 380190 transitions. [2021-06-05 18:19:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:19:32,918 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 [2021-06-05 18:19:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,359 INFO L225 Difference]: With dead ends: 141826 [2021-06-05 18:19:33,360 INFO L226 Difference]: Without dead ends: 141826 [2021-06-05 18:19:33,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141826 states. [2021-06-05 18:19:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141826 to 110996. [2021-06-05 18:19:34,949 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) [2021-06-05 18:19:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110996 states to 110996 states and 300096 transitions. [2021-06-05 18:19:35,175 INFO L78 Accepts]: Start accepts. Automaton has 110996 states and 300096 transitions. Word has length 429 [2021-06-05 18:19:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:35,175 INFO L482 AbstractCegarLoop]: Abstraction has 110996 states and 300096 transitions. [2021-06-05 18:19:35,175 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) [2021-06-05 18:19:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 110996 states and 300096 transitions. [2021-06-05 18:19:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-06-05 18:19:35,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:35,315 INFO L554 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] [2021-06-05 18:19:35,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 18:19:35,534 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash 709857022, now seen corresponding path program 72 times [2021-06-05 18:19:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:35,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585372370] [2021-06-05 18:19:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1124 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-06-05 18:19:35,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:35,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585372370] [2021-06-05 18:19:35,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585372370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400701950] [2021-06-05 18:19:35,761 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 [2021-06-05 18:19:36,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-06-05 18:19:36,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400701950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:36,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-06-05 18:19:36,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80715802] [2021-06-05 18:19:36,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:36,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:36,671 INFO L87 Difference]: Start difference. First operand 110996 states and 300096 transitions. Second operand has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:37,690 INFO L93 Difference]: Finished difference Result 202896 states and 543282 transitions. [2021-06-05 18:19:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:37,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:19:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:37,970 INFO L225 Difference]: With dead ends: 202896 [2021-06-05 18:19:37,970 INFO L226 Difference]: Without dead ends: 202896 [2021-06-05 18:19:37,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202896 states. [2021-06-05 18:19:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202896 to 136196. [2021-06-05 18:19:40,320 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) [2021-06-05 18:19:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 369256 transitions. [2021-06-05 18:19:40,558 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 369256 transitions. Word has length 448 [2021-06-05 18:19:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:40,559 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 369256 transitions. [2021-06-05 18:19:40,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 369256 transitions. [2021-06-05 18:19:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:40,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:40,717 INFO L554 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] [2021-06-05 18:19:40,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:40,917 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1241099505, now seen corresponding path program 73 times [2021-06-05 18:19:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:40,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318117702] [2021-06-05 18:19:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:41,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318117702] [2021-06-05 18:19:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318117702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637026085] [2021-06-05 18:19:41,498 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 [2021-06-05 18:19:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:42,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637026085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:42,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:42,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054073249] [2021-06-05 18:19:42,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:42,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:42,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:42,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:42,111 INFO L87 Difference]: Start difference. First operand 136196 states and 369256 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:42,785 INFO L93 Difference]: Finished difference Result 170241 states and 455421 transitions. [2021-06-05 18:19:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:19:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:42,992 INFO L225 Difference]: With dead ends: 170241 [2021-06-05 18:19:42,992 INFO L226 Difference]: Without dead ends: 170241 [2021-06-05 18:19:42,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170241 states. [2021-06-05 18:19:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170241 to 130576. [2021-06-05 18:19:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130576 states, 130574 states have (on average 2.710072449339072) internal successors, (353865), 130575 states have internal predecessors, (353865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130576 states to 130576 states and 353865 transitions. [2021-06-05 18:19:45,350 INFO L78 Accepts]: Start accepts. Automaton has 130576 states and 353865 transitions. Word has length 453 [2021-06-05 18:19:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:45,350 INFO L482 AbstractCegarLoop]: Abstraction has 130576 states and 353865 transitions. [2021-06-05 18:19:45,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 130576 states and 353865 transitions. [2021-06-05 18:19:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:45,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:45,499 INFO L554 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] [2021-06-05 18:19:45,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:19:45,713 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1590855537, now seen corresponding path program 74 times [2021-06-05 18:19:45,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:45,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812877203] [2021-06-05 18:19:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:46,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:46,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812877203] [2021-06-05 18:19:46,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812877203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995030990] [2021-06-05 18:19:46,348 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 [2021-06-05 18:19:46,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:46,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995030990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021180890] [2021-06-05 18:19:46,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:46,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:46,927 INFO L87 Difference]: Start difference. First operand 130576 states and 353865 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:47,626 INFO L93 Difference]: Finished difference Result 196376 states and 528037 transitions. [2021-06-05 18:19:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:19:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:48,227 INFO L225 Difference]: With dead ends: 196376 [2021-06-05 18:19:48,227 INFO L226 Difference]: Without dead ends: 196376 [2021-06-05 18:19:48,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196376 states. [2021-06-05 18:19:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196376 to 131936. [2021-06-05 18:19:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131936 states, 131934 states have (on average 2.710787211787712) internal successors, (357645), 131935 states have internal predecessors, (357645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131936 states to 131936 states and 357645 transitions. [2021-06-05 18:19:50,603 INFO L78 Accepts]: Start accepts. Automaton has 131936 states and 357645 transitions. Word has length 453 [2021-06-05 18:19:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:50,604 INFO L482 AbstractCegarLoop]: Abstraction has 131936 states and 357645 transitions. [2021-06-05 18:19:50,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 131936 states and 357645 transitions. [2021-06-05 18:19:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:50,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:50,797 INFO L554 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] [2021-06-05 18:19:50,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:50,998 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:50,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:50,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1497336749, now seen corresponding path program 75 times [2021-06-05 18:19:50,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:50,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93478859] [2021-06-05 18:19:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:51,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93478859] [2021-06-05 18:19:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93478859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527705886] [2021-06-05 18:19:51,159 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 [2021-06-05 18:19:51,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:51,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527705886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:51,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986125442] [2021-06-05 18:19:51,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:51,999 INFO L87 Difference]: Start difference. First operand 131936 states and 357645 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:53,094 INFO L93 Difference]: Finished difference Result 193486 states and 520515 transitions. [2021-06-05 18:19:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:53,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:19:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:53,320 INFO L225 Difference]: With dead ends: 193486 [2021-06-05 18:19:53,320 INFO L226 Difference]: Without dead ends: 193486 [2021-06-05 18:19:53,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193486 states. [2021-06-05 18:19:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193486 to 132616. [2021-06-05 18:19:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132614 states have (on average 2.7111390954197896) internal successors, (359535), 132615 states have internal predecessors, (359535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 359535 transitions. [2021-06-05 18:19:55,718 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 359535 transitions. Word has length 453 [2021-06-05 18:19:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:55,719 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 359535 transitions. [2021-06-05 18:19:55,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 359535 transitions. [2021-06-05 18:19:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:19:55,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:55,873 INFO L554 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] [2021-06-05 18:19:56,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:56,073 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1385809483, now seen corresponding path program 76 times [2021-06-05 18:19:56,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:56,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127946995] [2021-06-05 18:19:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:19:56,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127946995] [2021-06-05 18:19:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127946995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446126863] [2021-06-05 18:19:56,234 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 [2021-06-05 18:19:56,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:19:56,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446126863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:56,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:19:56,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552518684] [2021-06-05 18:19:56,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:56,950 INFO L87 Difference]: Start difference. First operand 132616 states and 359535 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:19:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:57,959 INFO L93 Difference]: Finished difference Result 184421 states and 495362 transitions. [2021-06-05 18:19:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:19:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:58,192 INFO L225 Difference]: With dead ends: 184421 [2021-06-05 18:19:58,192 INFO L226 Difference]: Without dead ends: 184421 [2021-06-05 18:19:58,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:19:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184421 states. [2021-06-05 18:20:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184421 to 133296. [2021-06-05 18:20:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133296 states, 133294 states have (on average 2.71148738877969) internal successors, (361425), 133295 states have internal predecessors, (361425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133296 states to 133296 states and 361425 transitions. [2021-06-05 18:20:00,553 INFO L78 Accepts]: Start accepts. Automaton has 133296 states and 361425 transitions. Word has length 453 [2021-06-05 18:20:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:00,553 INFO L482 AbstractCegarLoop]: Abstraction has 133296 states and 361425 transitions. [2021-06-05 18:20:00,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 133296 states and 361425 transitions. [2021-06-05 18:20:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:00,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:00,708 INFO L554 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] [2021-06-05 18:20:00,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:00,908 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -738398799, now seen corresponding path program 77 times [2021-06-05 18:20:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:00,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190837298] [2021-06-05 18:20:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:01,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190837298] [2021-06-05 18:20:01,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190837298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642182889] [2021-06-05 18:20:01,075 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 [2021-06-05 18:20:01,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:02,036 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:20:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:02,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642182889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:02,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236544827] [2021-06-05 18:20:02,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:02,305 INFO L87 Difference]: Start difference. First operand 133296 states and 361425 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:03,014 INFO L93 Difference]: Finished difference Result 189526 states and 509288 transitions. [2021-06-05 18:20:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:03,258 INFO L225 Difference]: With dead ends: 189526 [2021-06-05 18:20:03,258 INFO L226 Difference]: Without dead ends: 189526 [2021-06-05 18:20:03,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189526 states. [2021-06-05 18:20:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189526 to 132516. [2021-06-05 18:20:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132516 states, 132514 states have (on average 2.71095884208461) internal successors, (359240), 132515 states have internal predecessors, (359240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132516 states to 132516 states and 359240 transitions. [2021-06-05 18:20:05,818 INFO L78 Accepts]: Start accepts. Automaton has 132516 states and 359240 transitions. Word has length 453 [2021-06-05 18:20:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:05,818 INFO L482 AbstractCegarLoop]: Abstraction has 132516 states and 359240 transitions. [2021-06-05 18:20:05,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 132516 states and 359240 transitions. [2021-06-05 18:20:05,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:05,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:05,983 INFO L554 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] [2021-06-05 18:20:06,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:20:06,195 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1945173809, now seen corresponding path program 78 times [2021-06-05 18:20:06,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:06,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988675096] [2021-06-05 18:20:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:06,729 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:20:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:06,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:06,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988675096] [2021-06-05 18:20:06,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988675096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:06,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648057433] [2021-06-05 18:20:06,783 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 [2021-06-05 18:20:07,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648057433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:07,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125289478] [2021-06-05 18:20:07,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:07,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:07,733 INFO L87 Difference]: Start difference. First operand 132516 states and 359240 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:08,607 INFO L93 Difference]: Finished difference Result 235096 states and 635199 transitions. [2021-06-05 18:20:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:09,336 INFO L225 Difference]: With dead ends: 235096 [2021-06-05 18:20:09,336 INFO L226 Difference]: Without dead ends: 235096 [2021-06-05 18:20:09,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235096 states. [2021-06-05 18:20:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235096 to 135816. [2021-06-05 18:20:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135816 states, 135814 states have (on average 2.7122314341673173) internal successors, (368359), 135815 states have internal predecessors, (368359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135816 states to 135816 states and 368359 transitions. [2021-06-05 18:20:11,951 INFO L78 Accepts]: Start accepts. Automaton has 135816 states and 368359 transitions. Word has length 453 [2021-06-05 18:20:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:11,951 INFO L482 AbstractCegarLoop]: Abstraction has 135816 states and 368359 transitions. [2021-06-05 18:20:11,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 135816 states and 368359 transitions. [2021-06-05 18:20:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:12,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:12,107 INFO L554 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] [2021-06-05 18:20:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:20:12,317 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2056701075, now seen corresponding path program 79 times [2021-06-05 18:20:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049002802] [2021-06-05 18:20:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:12,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:12,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049002802] [2021-06-05 18:20:12,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049002802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54398333] [2021-06-05 18:20:12,493 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 [2021-06-05 18:20:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:12,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:13,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54398333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:13,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:13,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:13,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625112125] [2021-06-05 18:20:13,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:13,084 INFO L87 Difference]: Start difference. First operand 135816 states and 368359 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:14,288 INFO L93 Difference]: Finished difference Result 224481 states and 605431 transitions. [2021-06-05 18:20:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:14,629 INFO L225 Difference]: With dead ends: 224481 [2021-06-05 18:20:14,629 INFO L226 Difference]: Without dead ends: 224481 [2021-06-05 18:20:14,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224481 states. [2021-06-05 18:20:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224481 to 135136. [2021-06-05 18:20:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135136 states, 135134 states have (on average 2.7118933799043914) internal successors, (366469), 135135 states have internal predecessors, (366469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135136 states to 135136 states and 366469 transitions. [2021-06-05 18:20:17,284 INFO L78 Accepts]: Start accepts. Automaton has 135136 states and 366469 transitions. Word has length 453 [2021-06-05 18:20:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:17,284 INFO L482 AbstractCegarLoop]: Abstraction has 135136 states and 366469 transitions. [2021-06-05 18:20:17,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 135136 states and 366469 transitions. [2021-06-05 18:20:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:17,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:17,442 INFO L554 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] [2021-06-05 18:20:17,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 18:20:17,643 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash -78881167, now seen corresponding path program 80 times [2021-06-05 18:20:17,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:17,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585512598] [2021-06-05 18:20:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:17,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585512598] [2021-06-05 18:20:17,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585512598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884051372] [2021-06-05 18:20:17,809 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 [2021-06-05 18:20:18,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:18,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884051372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:18,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116982449] [2021-06-05 18:20:18,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:18,861 INFO L87 Difference]: Start difference. First operand 135136 states and 366469 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,599 INFO L93 Difference]: Finished difference Result 187456 states and 504450 transitions. [2021-06-05 18:20:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:19,840 INFO L225 Difference]: With dead ends: 187456 [2021-06-05 18:20:19,840 INFO L226 Difference]: Without dead ends: 187456 [2021-06-05 18:20:19,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187456 states. [2021-06-05 18:20:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187456 to 137076. [2021-06-05 18:20:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137076 states, 137074 states have (on average 2.7124618819032054) internal successors, (371808), 137075 states have internal predecessors, (371808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137076 states to 137076 states and 371808 transitions. [2021-06-05 18:20:22,310 INFO L78 Accepts]: Start accepts. Automaton has 137076 states and 371808 transitions. Word has length 453 [2021-06-05 18:20:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:22,311 INFO L482 AbstractCegarLoop]: Abstraction has 137076 states and 371808 transitions. [2021-06-05 18:20:22,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 137076 states and 371808 transitions. [2021-06-05 18:20:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:22,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:22,883 INFO L554 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] [2021-06-05 18:20:23,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:20:23,100 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash -190408433, now seen corresponding path program 81 times [2021-06-05 18:20:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871862242] [2021-06-05 18:20:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:23,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871862242] [2021-06-05 18:20:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871862242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398180471] [2021-06-05 18:20:23,263 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 [2021-06-05 18:20:23,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:23,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:24,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398180471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:24,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666320014] [2021-06-05 18:20:24,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:24,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:24,214 INFO L87 Difference]: Start difference. First operand 137076 states and 371808 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:25,445 INFO L93 Difference]: Finished difference Result 242811 states and 656248 transitions. [2021-06-05 18:20:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:25,780 INFO L225 Difference]: With dead ends: 242811 [2021-06-05 18:20:25,780 INFO L226 Difference]: Without dead ends: 242811 [2021-06-05 18:20:25,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242811 states. [2021-06-05 18:20:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242811 to 139696. [2021-06-05 18:20:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139696 states, 139694 states have (on average 2.7133377238821996) internal successors, (379037), 139695 states have internal predecessors, (379037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139696 states to 139696 states and 379037 transitions. [2021-06-05 18:20:28,656 INFO L78 Accepts]: Start accepts. Automaton has 139696 states and 379037 transitions. Word has length 453 [2021-06-05 18:20:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:28,656 INFO L482 AbstractCegarLoop]: Abstraction has 139696 states and 379037 transitions. [2021-06-05 18:20:28,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 139696 states and 379037 transitions. [2021-06-05 18:20:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:28,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:28,833 INFO L554 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] [2021-06-05 18:20:29,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:20:29,052 INFO L430 AbstractCegarLoop]: === Iteration 139 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -235667663, now seen corresponding path program 82 times [2021-06-05 18:20:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:29,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971650063] [2021-06-05 18:20:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-06-05 18:20:29,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971650063] [2021-06-05 18:20:29,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971650063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316094676] [2021-06-05 18:20:29,216 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 [2021-06-05 18:20:29,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:29,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1337 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-06-05 18:20:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316094676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:30,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-06-05 18:20:30,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736300714] [2021-06-05 18:20:30,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:30,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:30,336 INFO L87 Difference]: Start difference. First operand 139696 states and 379037 transitions. Second operand has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:31,033 INFO L93 Difference]: Finished difference Result 184031 states and 495027 transitions. [2021-06-05 18:20:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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 453 [2021-06-05 18:20:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:31,267 INFO L225 Difference]: With dead ends: 184031 [2021-06-05 18:20:31,268 INFO L226 Difference]: Without dead ends: 184031 [2021-06-05 18:20:31,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184031 states. [2021-06-05 18:20:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184031 to 141636. [2021-06-05 18:20:33,522 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) [2021-06-05 18:20:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384376 transitions. [2021-06-05 18:20:33,784 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384376 transitions. Word has length 453 [2021-06-05 18:20:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:33,785 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384376 transitions. [2021-06-05 18:20:33,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.35) internal successors, (407), 20 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) [2021-06-05 18:20:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384376 transitions. [2021-06-05 18:20:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:34,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:34,361 INFO L554 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] [2021-06-05 18:20:34,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:34,576 INFO L430 AbstractCegarLoop]: === Iteration 140 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2128595761, now seen corresponding path program 83 times [2021-06-05 18:20:34,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:34,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616444413] [2021-06-05 18:20:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:34,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616444413] [2021-06-05 18:20:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616444413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583294825] [2021-06-05 18:20:34,725 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 [2021-06-05 18:20:35,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:35,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583294825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:35,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:35,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81447766] [2021-06-05 18:20:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:35,451 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) [2021-06-05 18:20:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:36,536 INFO L93 Difference]: Finished difference Result 182396 states and 488995 transitions. [2021-06-05 18:20:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:36,536 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 [2021-06-05 18:20:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:36,747 INFO L225 Difference]: With dead ends: 182396 [2021-06-05 18:20:36,747 INFO L226 Difference]: Without dead ends: 182396 [2021-06-05 18:20:36,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182396 states. [2021-06-05 18:20:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182396 to 136496. [2021-06-05 18:20:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136496 states, 136494 states have (on average 2.712566120122496) internal successors, (370249), 136495 states have internal predecessors, (370249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136496 states to 136496 states and 370249 transitions. [2021-06-05 18:20:39,202 INFO L78 Accepts]: Start accepts. Automaton has 136496 states and 370249 transitions. Word has length 453 [2021-06-05 18:20:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:39,203 INFO L482 AbstractCegarLoop]: Abstraction has 136496 states and 370249 transitions. [2021-06-05 18:20:39,203 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) [2021-06-05 18:20:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 136496 states and 370249 transitions. [2021-06-05 18:20:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:39,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:39,364 INFO L554 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] [2021-06-05 18:20:39,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 18:20:39,565 INFO L430 AbstractCegarLoop]: === Iteration 141 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 959596525, now seen corresponding path program 84 times [2021-06-05 18:20:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:39,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445007881] [2021-06-05 18:20:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:39,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445007881] [2021-06-05 18:20:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445007881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680446212] [2021-06-05 18:20:39,715 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 [2021-06-05 18:20:40,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:40,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:40,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680446212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:40,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095825314] [2021-06-05 18:20:40,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:40,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:40,563 INFO L87 Difference]: Start difference. First operand 136496 states and 370249 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) [2021-06-05 18:20:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:41,717 INFO L93 Difference]: Finished difference Result 218306 states and 588806 transitions. [2021-06-05 18:20:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:41,717 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 [2021-06-05 18:20:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:42,028 INFO L225 Difference]: With dead ends: 218306 [2021-06-05 18:20:42,028 INFO L226 Difference]: Without dead ends: 218306 [2021-06-05 18:20:42,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218306 states. [2021-06-05 18:20:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218306 to 141636. [2021-06-05 18:20:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141636 states, 141634 states have (on average 2.714122315263284) internal successors, (384412), 141635 states have internal predecessors, (384412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384412 transitions. [2021-06-05 18:20:44,703 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384412 transitions. Word has length 453 [2021-06-05 18:20:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:44,703 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384412 transitions. [2021-06-05 18:20:44,703 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) [2021-06-05 18:20:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384412 transitions. [2021-06-05 18:20:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:44,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:44,873 INFO L554 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] [2021-06-05 18:20:45,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:45,073 INFO L430 AbstractCegarLoop]: === Iteration 142 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:45,074 INFO L82 PathProgramCache]: Analyzing trace with hash 848069259, now seen corresponding path program 85 times [2021-06-05 18:20:45,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:45,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958415295] [2021-06-05 18:20:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:45,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:45,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958415295] [2021-06-05 18:20:45,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958415295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477381688] [2021-06-05 18:20:45,694 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 [2021-06-05 18:20:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477381688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:46,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:46,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702890787] [2021-06-05 18:20:46,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:46,336 INFO L87 Difference]: Start difference. First operand 141636 states and 384412 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) [2021-06-05 18:20:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:47,179 INFO L93 Difference]: Finished difference Result 208476 states and 561638 transitions. [2021-06-05 18:20:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:47,179 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 [2021-06-05 18:20:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:47,855 INFO L225 Difference]: With dead ends: 208476 [2021-06-05 18:20:47,855 INFO L226 Difference]: Without dead ends: 208476 [2021-06-05 18:20:47,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208476 states. [2021-06-05 18:20:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208476 to 139596. [2021-06-05 18:20:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139596 states, 139594 states have (on average 2.713168187744459) internal successors, (378742), 139595 states have internal predecessors, (378742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139596 states to 139596 states and 378742 transitions. [2021-06-05 18:20:50,446 INFO L78 Accepts]: Start accepts. Automaton has 139596 states and 378742 transitions. Word has length 453 [2021-06-05 18:20:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,447 INFO L482 AbstractCegarLoop]: Abstraction has 139596 states and 378742 transitions. [2021-06-05 18:20:50,447 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) [2021-06-05 18:20:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 139596 states and 378742 transitions. [2021-06-05 18:20:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:50,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,614 INFO L554 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] [2021-06-05 18:20:50,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:50,815 INFO L430 AbstractCegarLoop]: === Iteration 143 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1469078129, now seen corresponding path program 86 times [2021-06-05 18:20:50,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:50,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104421942] [2021-06-05 18:20:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:50,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104421942] [2021-06-05 18:20:50,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104421942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390028261] [2021-06-05 18:20:50,962 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 [2021-06-05 18:20:51,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:51,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390028261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:51,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:51,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270557646] [2021-06-05 18:20:51,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:51,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:51,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:51,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:51,540 INFO L87 Difference]: Start difference. First operand 139596 states and 378742 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) [2021-06-05 18:20:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:52,679 INFO L93 Difference]: Finished difference Result 215846 states and 582146 transitions. [2021-06-05 18:20:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:52,680 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 [2021-06-05 18:20:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:52,973 INFO L225 Difference]: With dead ends: 215846 [2021-06-05 18:20:52,974 INFO L226 Difference]: Without dead ends: 215846 [2021-06-05 18:20:52,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215846 states. [2021-06-05 18:20:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215846 to 147156. [2021-06-05 18:20:55,358 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) [2021-06-05 18:20:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147156 states to 147156 states and 399472 transitions. [2021-06-05 18:20:55,628 INFO L78 Accepts]: Start accepts. Automaton has 147156 states and 399472 transitions. Word has length 453 [2021-06-05 18:20:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:55,628 INFO L482 AbstractCegarLoop]: Abstraction has 147156 states and 399472 transitions. [2021-06-05 18:20:55,628 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) [2021-06-05 18:20:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 147156 states and 399472 transitions. [2021-06-05 18:20:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:20:55,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:55,805 INFO L554 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] [2021-06-05 18:20:56,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:56,006 INFO L430 AbstractCegarLoop]: === Iteration 144 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1580605395, now seen corresponding path program 87 times [2021-06-05 18:20:56,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:56,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853516946] [2021-06-05 18:20:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:56,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853516946] [2021-06-05 18:20:56,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853516946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323810819] [2021-06-05 18:20:56,597 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 [2021-06-05 18:20:57,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:20:57,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323810819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:57,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:20:57,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286475061] [2021-06-05 18:20:57,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:57,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:57,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:57,575 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) [2021-06-05 18:20:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:58,917 INFO L93 Difference]: Finished difference Result 268381 states and 726313 transitions. [2021-06-05 18:20:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:58,917 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 [2021-06-05 18:20:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:59,302 INFO L225 Difference]: With dead ends: 268381 [2021-06-05 18:20:59,302 INFO L226 Difference]: Without dead ends: 268381 [2021-06-05 18:20:59,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268381 states. [2021-06-05 18:21:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268381 to 149096. [2021-06-05 18:21:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149096 states, 149094 states have (on average 2.7151394422310755) internal successors, (404811), 149095 states have internal predecessors, (404811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149096 states to 149096 states and 404811 transitions. [2021-06-05 18:21:02,085 INFO L78 Accepts]: Start accepts. Automaton has 149096 states and 404811 transitions. Word has length 453 [2021-06-05 18:21:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:02,085 INFO L482 AbstractCegarLoop]: Abstraction has 149096 states and 404811 transitions. [2021-06-05 18:21:02,085 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) [2021-06-05 18:21:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 149096 states and 404811 transitions. [2021-06-05 18:21:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:21:02,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:02,261 INFO L554 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] [2021-06-05 18:21:02,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:02,461 INFO L430 AbstractCegarLoop]: === Iteration 145 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1625864625, now seen corresponding path program 88 times [2021-06-05 18:21:02,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:02,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954797624] [2021-06-05 18:21:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:02,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954797624] [2021-06-05 18:21:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954797624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569946977] [2021-06-05 18:21:02,608 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 [2021-06-05 18:21:03,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:03,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:03,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:04,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569946977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:04,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:04,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:04,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003619468] [2021-06-05 18:21:04,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:04,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:04,018 INFO L87 Difference]: Start difference. First operand 149096 states and 404811 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) [2021-06-05 18:21:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:04,838 INFO L93 Difference]: Finished difference Result 207846 states and 560419 transitions. [2021-06-05 18:21:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:04,838 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 [2021-06-05 18:21:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:05,140 INFO L225 Difference]: With dead ends: 207846 [2021-06-05 18:21:05,140 INFO L226 Difference]: Without dead ends: 207846 [2021-06-05 18:21:05,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207846 states. [2021-06-05 18:21:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207846 to 147156. [2021-06-05 18:21:07,565 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) [2021-06-05 18:21:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147156 states to 147156 states and 399472 transitions. [2021-06-05 18:21:08,225 INFO L78 Accepts]: Start accepts. Automaton has 147156 states and 399472 transitions. Word has length 453 [2021-06-05 18:21:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:08,226 INFO L482 AbstractCegarLoop]: Abstraction has 147156 states and 399472 transitions. [2021-06-05 18:21:08,226 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) [2021-06-05 18:21:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 147156 states and 399472 transitions. [2021-06-05 18:21:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:21:08,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:08,407 INFO L554 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] [2021-06-05 18:21:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:21:08,608 INFO L430 AbstractCegarLoop]: === Iteration 146 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2003309613, now seen corresponding path program 89 times [2021-06-05 18:21:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:08,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264618559] [2021-06-05 18:21:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:08,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:08,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264618559] [2021-06-05 18:21:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264618559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:08,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808656190] [2021-06-05 18:21:08,754 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 [2021-06-05 18:21:09,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:09,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808656190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:09,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:09,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347077711] [2021-06-05 18:21:09,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:09,491 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) [2021-06-05 18:21:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:10,555 INFO L93 Difference]: Finished difference Result 177711 states and 477459 transitions. [2021-06-05 18:21:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:10,555 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 [2021-06-05 18:21:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:10,783 INFO L225 Difference]: With dead ends: 177711 [2021-06-05 18:21:10,783 INFO L226 Difference]: Without dead ends: 177711 [2021-06-05 18:21:10,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177711 states. [2021-06-05 18:21:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177711 to 141536. [2021-06-05 18:21:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141536 states, 141534 states have (on average 2.7137013014540674) internal successors, (384081), 141535 states have internal predecessors, (384081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141536 states to 141536 states and 384081 transitions. [2021-06-05 18:21:13,151 INFO L78 Accepts]: Start accepts. Automaton has 141536 states and 384081 transitions. Word has length 453 [2021-06-05 18:21:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:13,151 INFO L482 AbstractCegarLoop]: Abstraction has 141536 states and 384081 transitions. [2021-06-05 18:21:13,151 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) [2021-06-05 18:21:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 141536 states and 384081 transitions. [2021-06-05 18:21:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:21:13,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:13,318 INFO L554 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] [2021-06-05 18:21:13,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 18:21:13,518 INFO L430 AbstractCegarLoop]: === Iteration 147 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1891782347, now seen corresponding path program 90 times [2021-06-05 18:21:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:13,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815781725] [2021-06-05 18:21:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:13,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:13,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815781725] [2021-06-05 18:21:13,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815781725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:13,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295722967] [2021-06-05 18:21:13,665 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 [2021-06-05 18:21:14,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:14,709 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:21:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295722967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:14,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:14,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502081238] [2021-06-05 18:21:14,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:14,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:14,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:14,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:14,867 INFO L87 Difference]: Start difference. First operand 141536 states and 384081 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) [2021-06-05 18:21:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:15,712 INFO L93 Difference]: Finished difference Result 223476 states and 603618 transitions. [2021-06-05 18:21:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:15,713 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 [2021-06-05 18:21:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:16,042 INFO L225 Difference]: With dead ends: 223476 [2021-06-05 18:21:16,042 INFO L226 Difference]: Without dead ends: 223476 [2021-06-05 18:21:16,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=400, Invalid=1240, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223476 states. [2021-06-05 18:21:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223476 to 144636. [2021-06-05 18:21:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144636 states, 144634 states have (on average 2.7142580582712226) internal successors, (392574), 144635 states have internal predecessors, (392574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144636 states to 144636 states and 392574 transitions. [2021-06-05 18:21:19,024 INFO L78 Accepts]: Start accepts. Automaton has 144636 states and 392574 transitions. Word has length 453 [2021-06-05 18:21:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:19,024 INFO L482 AbstractCegarLoop]: Abstraction has 144636 states and 392574 transitions. [2021-06-05 18:21:19,025 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) [2021-06-05 18:21:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 144636 states and 392574 transitions. [2021-06-05 18:21:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:21:19,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:19,207 INFO L554 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] [2021-06-05 18:21:19,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:21:19,421 INFO L430 AbstractCegarLoop]: === Iteration 148 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1846523117, now seen corresponding path program 91 times [2021-06-05 18:21:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:19,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337016537] [2021-06-05 18:21:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:20,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:20,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337016537] [2021-06-05 18:21:20,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337016537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:20,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47375359] [2021-06-05 18:21:20,002 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 [2021-06-05 18:21:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47375359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:20,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:20,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:20,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850197715] [2021-06-05 18:21:20,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:20,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:20,682 INFO L87 Difference]: Start difference. First operand 144636 states and 392574 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) [2021-06-05 18:21:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:21,534 INFO L93 Difference]: Finished difference Result 223646 states and 604118 transitions. [2021-06-05 18:21:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:21,535 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 [2021-06-05 18:21:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:22,280 INFO L225 Difference]: With dead ends: 223646 [2021-06-05 18:21:22,280 INFO L226 Difference]: Without dead ends: 223646 [2021-06-05 18:21:22,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:21:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223646 states. [2021-06-05 18:21:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223646 to 145896. [2021-06-05 18:21:24,692 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) [2021-06-05 18:21:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145896 states to 145896 states and 396023 transitions. [2021-06-05 18:21:24,955 INFO L78 Accepts]: Start accepts. Automaton has 145896 states and 396023 transitions. Word has length 453 [2021-06-05 18:21:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:24,955 INFO L482 AbstractCegarLoop]: Abstraction has 145896 states and 396023 transitions. [2021-06-05 18:21:24,955 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) [2021-06-05 18:21:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 145896 states and 396023 transitions. [2021-06-05 18:21:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-06-05 18:21:25,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:25,128 INFO L554 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] [2021-06-05 18:21:25,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:21:25,329 INFO L430 AbstractCegarLoop]: === Iteration 149 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1124018955, now seen corresponding path program 92 times [2021-06-05 18:21:25,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:25,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48149235] [2021-06-05 18:21:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:25,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48149235] [2021-06-05 18:21:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48149235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106148832] [2021-06-05 18:21:25,474 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 [2021-06-05 18:21:25,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-06-05 18:21:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106148832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:26,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:26,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:21:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265434032] [2021-06-05 18:21:26,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:21:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:21:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:21:26,055 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) [2021-06-05 18:21:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:27,223 INFO L93 Difference]: Finished difference Result 196316 states and 527524 transitions. [2021-06-05 18:21:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:27,223 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 [2021-06-05 18:21:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:27,477 INFO L225 Difference]: With dead ends: 196316 [2021-06-05 18:21:27,477 INFO L226 Difference]: Without dead ends: 196316 [2021-06-05 18:21:27,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=413, Invalid=1309, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:21:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196316 states. [2021-06-05 18:21:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196316 to 157136. [2021-06-05 18:21:29,988 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) [2021-06-05 18:21:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:21:30,704 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 453 [2021-06-05 18:21:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:21:30,705 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) [2021-06-05 18:21:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:21:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:30,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:30,903 INFO L554 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] [2021-06-05 18:21:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 18:21:31,105 INFO L430 AbstractCegarLoop]: === Iteration 150 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -618533180, now seen corresponding path program 93 times [2021-06-05 18:21:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373561166] [2021-06-05 18:21:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:21:31,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:31,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373561166] [2021-06-05 18:21:31,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373561166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584144756] [2021-06-05 18:21:31,301 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 [2021-06-05 18:21:31,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:21:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:21:32,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584144756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:32,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:32,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:21:32,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127349425] [2021-06-05 18:21:32,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:32,157 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:33,266 INFO L93 Difference]: Finished difference Result 187441 states and 503656 transitions. [2021-06-05 18:21:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:33,510 INFO L225 Difference]: With dead ends: 187441 [2021-06-05 18:21:33,510 INFO L226 Difference]: Without dead ends: 187441 [2021-06-05 18:21:33,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187441 states. [2021-06-05 18:21:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187441 to 157136. [2021-06-05 18:21:35,833 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) [2021-06-05 18:21:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:21:36,127 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 458 [2021-06-05 18:21:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:36,127 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:21:36,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:21:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:36,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:36,319 INFO L554 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] [2021-06-05 18:21:36,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:36,521 INFO L430 AbstractCegarLoop]: === Iteration 151 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash -276421662, now seen corresponding path program 94 times [2021-06-05 18:21:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:36,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753258574] [2021-06-05 18:21:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:21:37,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:37,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753258574] [2021-06-05 18:21:37,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753258574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:37,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353961025] [2021-06-05 18:21:37,205 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:37,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:21:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353961025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:38,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:21:38,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900792641] [2021-06-05 18:21:38,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:38,365 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:39,251 INFO L93 Difference]: Finished difference Result 206876 states and 556500 transitions. [2021-06-05 18:21:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:39,915 INFO L225 Difference]: With dead ends: 206876 [2021-06-05 18:21:39,915 INFO L226 Difference]: Without dead ends: 206876 [2021-06-05 18:21:39,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=551, Invalid=1429, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206876 states. [2021-06-05 18:21:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206876 to 157136. [2021-06-05 18:21:42,262 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) [2021-06-05 18:21:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157136 states to 157136 states and 426841 transitions. [2021-06-05 18:21:42,556 INFO L78 Accepts]: Start accepts. Automaton has 157136 states and 426841 transitions. Word has length 458 [2021-06-05 18:21:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:42,556 INFO L482 AbstractCegarLoop]: Abstraction has 157136 states and 426841 transitions. [2021-06-05 18:21:42,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 157136 states and 426841 transitions. [2021-06-05 18:21:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:42,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:42,753 INFO L554 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] [2021-06-05 18:21:42,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:42,953 INFO L430 AbstractCegarLoop]: === Iteration 152 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash -94699392, now seen corresponding path program 95 times [2021-06-05 18:21:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:42,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487188482] [2021-06-05 18:21:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:21:43,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487188482] [2021-06-05 18:21:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487188482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979401401] [2021-06-05 18:21:43,145 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:43,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:21:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:43,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:44,204 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:21:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:21:44,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979401401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:44,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:44,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:21:44,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567198860] [2021-06-05 18:21:44,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:44,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:44,295 INFO L87 Difference]: Start difference. First operand 157136 states and 426841 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:45,197 INFO L93 Difference]: Finished difference Result 211106 states and 569993 transitions. [2021-06-05 18:21:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:45,502 INFO L225 Difference]: With dead ends: 211106 [2021-06-05 18:21:45,502 INFO L226 Difference]: Without dead ends: 211106 [2021-06-05 18:21:45,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=563, Invalid=1507, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:21:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211106 states. [2021-06-05 18:21:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211106 to 162376. [2021-06-05 18:21:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162376 states, 162374 states have (on average 2.7177934891053988) internal successors, (441299), 162375 states have internal predecessors, (441299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162376 states to 162376 states and 441299 transitions. [2021-06-05 18:21:48,753 INFO L78 Accepts]: Start accepts. Automaton has 162376 states and 441299 transitions. Word has length 458 [2021-06-05 18:21:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:48,754 INFO L482 AbstractCegarLoop]: Abstraction has 162376 states and 441299 transitions. [2021-06-05 18:21:48,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 162376 states and 441299 transitions. [2021-06-05 18:21:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:48,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:48,949 INFO L554 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] [2021-06-05 18:21:49,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:49,149 INFO L430 AbstractCegarLoop]: === Iteration 153 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 513959070, now seen corresponding path program 96 times [2021-06-05 18:21:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:49,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335570307] [2021-06-05 18:21:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:21:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335570307] [2021-06-05 18:21:49,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335570307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:49,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019785930] [2021-06-05 18:21:49,342 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:50,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:21:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:21:50,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019785930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:50,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:50,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:21:50,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860344303] [2021-06-05 18:21:50,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:50,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:50,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:50,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:50,479 INFO L87 Difference]: Start difference. First operand 162376 states and 441299 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:51,712 INFO L93 Difference]: Finished difference Result 216291 states and 583626 transitions. [2021-06-05 18:21:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:51,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:52,030 INFO L225 Difference]: With dead ends: 216291 [2021-06-05 18:21:52,030 INFO L226 Difference]: Without dead ends: 216291 [2021-06-05 18:21:52,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216291 states. [2021-06-05 18:21:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216291 to 166256. [2021-06-05 18:21:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166256 states, 166254 states have (on average 2.7185932368544514) internal successors, (451977), 166255 states have internal predecessors, (451977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166256 states to 166256 states and 451977 transitions. [2021-06-05 18:21:54,841 INFO L78 Accepts]: Start accepts. Automaton has 166256 states and 451977 transitions. Word has length 458 [2021-06-05 18:21:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:54,842 INFO L482 AbstractCegarLoop]: Abstraction has 166256 states and 451977 transitions. [2021-06-05 18:21:54,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 166256 states and 451977 transitions. [2021-06-05 18:21:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:21:55,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:55,498 INFO L554 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] [2021-06-05 18:21:55,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:55,698 INFO L430 AbstractCegarLoop]: === Iteration 154 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1976971324, now seen corresponding path program 97 times [2021-06-05 18:21:55,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:55,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577391311] [2021-06-05 18:21:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:21:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577391311] [2021-06-05 18:21:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577391311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907066637] [2021-06-05 18:21:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:21:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:21:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907066637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:56,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:21:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896502225] [2021-06-05 18:21:56,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:56,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:56,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:56,466 INFO L87 Difference]: Start difference. First operand 166256 states and 451977 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:57,764 INFO L93 Difference]: Finished difference Result 217656 states and 587099 transitions. [2021-06-05 18:21:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:21:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:58,065 INFO L225 Difference]: With dead ends: 217656 [2021-06-05 18:21:58,065 INFO L226 Difference]: Without dead ends: 217656 [2021-06-05 18:21:58,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=587, Invalid=1669, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:21:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217656 states. [2021-06-05 18:22:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217656 to 166936. [2021-06-05 18:22:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166936 states, 166934 states have (on average 2.7188409790695722) internal successors, (453867), 166935 states have internal predecessors, (453867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166936 states to 166936 states and 453867 transitions. [2021-06-05 18:22:00,761 INFO L78 Accepts]: Start accepts. Automaton has 166936 states and 453867 transitions. Word has length 458 [2021-06-05 18:22:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:00,761 INFO L482 AbstractCegarLoop]: Abstraction has 166936 states and 453867 transitions. [2021-06-05 18:22:00,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 166936 states and 453867 transitions. [2021-06-05 18:22:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:00,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:00,968 INFO L554 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] [2021-06-05 18:22:01,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:01,168 INFO L430 AbstractCegarLoop]: === Iteration 155 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash 770196314, now seen corresponding path program 98 times [2021-06-05 18:22:01,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:01,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16478268] [2021-06-05 18:22:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:22:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16478268] [2021-06-05 18:22:01,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16478268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491664426] [2021-06-05 18:22:01,848 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:02,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:22:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491664426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:02,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:22:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750909064] [2021-06-05 18:22:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:02,454 INFO L87 Difference]: Start difference. First operand 166936 states and 453867 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:03,738 INFO L93 Difference]: Finished difference Result 208221 states and 561265 transitions. [2021-06-05 18:22:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:04,038 INFO L225 Difference]: With dead ends: 208221 [2021-06-05 18:22:04,039 INFO L226 Difference]: Without dead ends: 208221 [2021-06-05 18:22:04,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:22:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208221 states. [2021-06-05 18:22:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208221 to 167616. [2021-06-05 18:22:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167616 states, 167614 states have (on average 2.7190867111339148) internal successors, (455757), 167615 states have internal predecessors, (455757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167616 states to 167616 states and 455757 transitions. [2021-06-05 18:22:06,766 INFO L78 Accepts]: Start accepts. Automaton has 167616 states and 455757 transitions. Word has length 458 [2021-06-05 18:22:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:06,766 INFO L482 AbstractCegarLoop]: Abstraction has 167616 states and 455757 transitions. [2021-06-05 18:22:06,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 167616 states and 455757 transitions. [2021-06-05 18:22:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:06,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:06,976 INFO L554 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] [2021-06-05 18:22:07,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:07,176 INFO L430 AbstractCegarLoop]: === Iteration 156 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 658669048, now seen corresponding path program 99 times [2021-06-05 18:22:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:07,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109690176] [2021-06-05 18:22:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1661 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-06-05 18:22:07,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109690176] [2021-06-05 18:22:07,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109690176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:07,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62790452] [2021-06-05 18:22:07,368 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:07,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:08,432 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:22:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1637 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-06-05 18:22:08,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62790452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:08,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:08,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-06-05 18:22:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729847357] [2021-06-05 18:22:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:08,733 INFO L87 Difference]: Start difference. First operand 167616 states and 455757 transitions. Second operand has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:09,912 INFO L93 Difference]: Finished difference Result 201856 states and 544142 transitions. [2021-06-05 18:22:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:10,252 INFO L225 Difference]: With dead ends: 201856 [2021-06-05 18:22:10,252 INFO L226 Difference]: Without dead ends: 201856 [2021-06-05 18:22:10,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201856 states. [2021-06-05 18:22:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201856 to 166936. [2021-06-05 18:22:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166936 states, 166934 states have (on average 2.7188409790695722) internal successors, (453867), 166935 states have internal predecessors, (453867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166936 states to 166936 states and 453867 transitions. [2021-06-05 18:22:12,938 INFO L78 Accepts]: Start accepts. Automaton has 166936 states and 453867 transitions. Word has length 458 [2021-06-05 18:22:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:12,939 INFO L482 AbstractCegarLoop]: Abstraction has 166936 states and 453867 transitions. [2021-06-05 18:22:12,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.391304347826086) internal successors, (446), 23 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 166936 states and 453867 transitions. [2021-06-05 18:22:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:13,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:13,139 INFO L554 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] [2021-06-05 18:22:13,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:13,339 INFO L430 AbstractCegarLoop]: === Iteration 157 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1535680388, now seen corresponding path program 100 times [2021-06-05 18:22:13,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:13,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436327718] [2021-06-05 18:22:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:14,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436327718] [2021-06-05 18:22:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436327718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377391124] [2021-06-05 18:22:14,033 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:14,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:14,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377391124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:15,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:15,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64838561] [2021-06-05 18:22:15,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:15,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:15,040 INFO L87 Difference]: Start difference. First operand 166936 states and 453867 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:15,888 INFO L93 Difference]: Finished difference Result 203496 states and 547129 transitions. [2021-06-05 18:22:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:16,522 INFO L225 Difference]: With dead ends: 203496 [2021-06-05 18:22:16,522 INFO L226 Difference]: Without dead ends: 203496 [2021-06-05 18:22:16,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:22:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203496 states. [2021-06-05 18:22:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203496 to 163636. [2021-06-05 18:22:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163636 states, 163634 states have (on average 2.7179437036312746) internal successors, (444748), 163635 states have internal predecessors, (444748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163636 states to 163636 states and 444748 transitions. [2021-06-05 18:22:19,247 INFO L78 Accepts]: Start accepts. Automaton has 163636 states and 444748 transitions. Word has length 458 [2021-06-05 18:22:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:19,248 INFO L482 AbstractCegarLoop]: Abstraction has 163636 states and 444748 transitions. [2021-06-05 18:22:19,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 163636 states and 444748 transitions. [2021-06-05 18:22:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:19,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:19,445 INFO L554 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] [2021-06-05 18:22:19,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:22:19,645 INFO L430 AbstractCegarLoop]: === Iteration 158 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:19,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1717402658, now seen corresponding path program 101 times [2021-06-05 18:22:19,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:19,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822753833] [2021-06-05 18:22:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:19,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:19,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822753833] [2021-06-05 18:22:19,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822753833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:19,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087705553] [2021-06-05 18:22:19,823 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:20,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087705553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:21,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:21,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592509276] [2021-06-05 18:22:21,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:21,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:21,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:21,071 INFO L87 Difference]: Start difference. First operand 163636 states and 444748 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:21,959 INFO L93 Difference]: Finished difference Result 232156 states and 626613 transitions. [2021-06-05 18:22:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:22,276 INFO L225 Difference]: With dead ends: 232156 [2021-06-05 18:22:22,276 INFO L226 Difference]: Without dead ends: 232156 [2021-06-05 18:22:22,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=547, Invalid=1433, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:22:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232156 states. [2021-06-05 18:22:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232156 to 162956. [2021-06-05 18:22:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162956 states, 162954 states have (on average 2.717687200068731) internal successors, (442858), 162955 states have internal predecessors, (442858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162956 states to 162956 states and 442858 transitions. [2021-06-05 18:22:25,499 INFO L78 Accepts]: Start accepts. Automaton has 162956 states and 442858 transitions. Word has length 458 [2021-06-05 18:22:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:25,499 INFO L482 AbstractCegarLoop]: Abstraction has 162956 states and 442858 transitions. [2021-06-05 18:22:25,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 162956 states and 442858 transitions. [2021-06-05 18:22:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:25,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:25,693 INFO L554 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] [2021-06-05 18:22:25,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:25,894 INFO L430 AbstractCegarLoop]: === Iteration 159 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1968906176, now seen corresponding path program 102 times [2021-06-05 18:22:25,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:25,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885417169] [2021-06-05 18:22:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:26,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:26,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885417169] [2021-06-05 18:22:26,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885417169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:26,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638295451] [2021-06-05 18:22:26,070 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:26,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:26,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:27,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638295451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:27,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645199482] [2021-06-05 18:22:27,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:27,440 INFO L87 Difference]: Start difference. First operand 162956 states and 442858 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:28,397 INFO L93 Difference]: Finished difference Result 244101 states and 658864 transitions. [2021-06-05 18:22:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:28,747 INFO L225 Difference]: With dead ends: 244101 [2021-06-05 18:22:28,747 INFO L226 Difference]: Without dead ends: 244101 [2021-06-05 18:22:28,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=558, Invalid=1512, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244101 states. [2021-06-05 18:22:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244101 to 164896. [2021-06-05 18:22:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164896 states, 164894 states have (on average 2.718091622496877) internal successors, (448197), 164895 states have internal predecessors, (448197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164896 states to 164896 states and 448197 transitions. [2021-06-05 18:22:31,936 INFO L78 Accepts]: Start accepts. Automaton has 164896 states and 448197 transitions. Word has length 458 [2021-06-05 18:22:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:31,937 INFO L482 AbstractCegarLoop]: Abstraction has 164896 states and 448197 transitions. [2021-06-05 18:22:31,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 164896 states and 448197 transitions. [2021-06-05 18:22:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:32,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:32,126 INFO L554 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] [2021-06-05 18:22:32,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:22:32,327 INFO L430 AbstractCegarLoop]: === Iteration 160 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:32,327 INFO L82 PathProgramCache]: Analyzing trace with hash -505893922, now seen corresponding path program 103 times [2021-06-05 18:22:32,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:32,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801389653] [2021-06-05 18:22:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:32,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:32,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801389653] [2021-06-05 18:22:32,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801389653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:32,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433246276] [2021-06-05 18:22:32,504 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:33,493 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 18:22:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:33,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433246276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:33,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:33,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:33,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723432342] [2021-06-05 18:22:33,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:33,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:33,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:33,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:33,501 INFO L87 Difference]: Start difference. First operand 164896 states and 448197 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:34,433 INFO L93 Difference]: Finished difference Result 240566 states and 649604 transitions. [2021-06-05 18:22:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:34,776 INFO L225 Difference]: With dead ends: 240566 [2021-06-05 18:22:34,777 INFO L226 Difference]: Without dead ends: 240566 [2021-06-05 18:22:34,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:22:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240566 states. [2021-06-05 18:22:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240566 to 165576. [2021-06-05 18:22:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165576 states, 165574 states have (on average 2.718343459721937) internal successors, (450087), 165575 states have internal predecessors, (450087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165576 states to 165576 states and 450087 transitions. [2021-06-05 18:22:38,044 INFO L78 Accepts]: Start accepts. Automaton has 165576 states and 450087 transitions. Word has length 458 [2021-06-05 18:22:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:38,045 INFO L482 AbstractCegarLoop]: Abstraction has 165576 states and 450087 transitions. [2021-06-05 18:22:38,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 165576 states and 450087 transitions. [2021-06-05 18:22:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:38,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:38,243 INFO L554 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] [2021-06-05 18:22:38,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:38,444 INFO L430 AbstractCegarLoop]: === Iteration 161 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1712668932, now seen corresponding path program 104 times [2021-06-05 18:22:38,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:38,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879173324] [2021-06-05 18:22:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:38,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:38,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879173324] [2021-06-05 18:22:38,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879173324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:38,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230089326] [2021-06-05 18:22:38,620 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:38,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:38,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:39,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230089326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:39,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:39,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:39,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894428050] [2021-06-05 18:22:39,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:39,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:39,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:39,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:39,215 INFO L87 Difference]: Start difference. First operand 165576 states and 450087 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:40,537 INFO L93 Difference]: Finished difference Result 230361 states and 621320 transitions. [2021-06-05 18:22:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:40,860 INFO L225 Difference]: With dead ends: 230361 [2021-06-05 18:22:40,860 INFO L226 Difference]: Without dead ends: 230361 [2021-06-05 18:22:40,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1676, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230361 states. [2021-06-05 18:22:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230361 to 166256. [2021-06-05 18:22:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166256 states, 166254 states have (on average 2.7185932368544514) internal successors, (451977), 166255 states have internal predecessors, (451977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166256 states to 166256 states and 451977 transitions. [2021-06-05 18:22:44,160 INFO L78 Accepts]: Start accepts. Automaton has 166256 states and 451977 transitions. Word has length 458 [2021-06-05 18:22:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:44,161 INFO L482 AbstractCegarLoop]: Abstraction has 166256 states and 451977 transitions. [2021-06-05 18:22:44,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 166256 states and 451977 transitions. [2021-06-05 18:22:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:44,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:44,362 INFO L554 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] [2021-06-05 18:22:44,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 18:22:44,563 INFO L430 AbstractCegarLoop]: === Iteration 162 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1824196198, now seen corresponding path program 105 times [2021-06-05 18:22:44,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:44,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416661523] [2021-06-05 18:22:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:44,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416661523] [2021-06-05 18:22:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416661523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937868500] [2021-06-05 18:22:44,741 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:45,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937868500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:45,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983985779] [2021-06-05 18:22:45,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:45,676 INFO L87 Difference]: Start difference. First operand 166256 states and 451977 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:46,962 INFO L93 Difference]: Finished difference Result 218906 states and 589807 transitions. [2021-06-05 18:22:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:47,279 INFO L225 Difference]: With dead ends: 218906 [2021-06-05 18:22:47,279 INFO L226 Difference]: Without dead ends: 218906 [2021-06-05 18:22:47,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1761, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:22:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218906 states. [2021-06-05 18:22:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218906 to 164216. [2021-06-05 18:22:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164216 states, 164214 states have (on average 2.717837699587124) internal successors, (446307), 164215 states have internal predecessors, (446307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164216 states to 164216 states and 446307 transitions. [2021-06-05 18:22:50,096 INFO L78 Accepts]: Start accepts. Automaton has 164216 states and 446307 transitions. Word has length 458 [2021-06-05 18:22:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:50,096 INFO L482 AbstractCegarLoop]: Abstraction has 164216 states and 446307 transitions. [2021-06-05 18:22:50,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 164216 states and 446307 transitions. [2021-06-05 18:22:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:50,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:50,780 INFO L554 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] [2021-06-05 18:22:50,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:50,981 INFO L430 AbstractCegarLoop]: === Iteration 163 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:50,981 INFO L82 PathProgramCache]: Analyzing trace with hash -183009212, now seen corresponding path program 106 times [2021-06-05 18:22:50,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:50,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640554876] [2021-06-05 18:22:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:51,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:51,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640554876] [2021-06-05 18:22:51,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640554876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:51,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517490712] [2021-06-05 18:22:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:51,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:52,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517490712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:52,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108458092] [2021-06-05 18:22:52,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:52,181 INFO L87 Difference]: Start difference. First operand 164216 states and 446307 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:53,410 INFO L93 Difference]: Finished difference Result 208156 states and 560802 transitions. [2021-06-05 18:22:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:53,661 INFO L225 Difference]: With dead ends: 208156 [2021-06-05 18:22:53,661 INFO L226 Difference]: Without dead ends: 208156 [2021-06-05 18:22:53,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:22:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208156 states. [2021-06-05 18:22:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208156 to 159456. [2021-06-05 18:22:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159456 states, 159454 states have (on average 2.716225369071958) internal successors, (433113), 159455 states have internal predecessors, (433113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159456 states to 159456 states and 433113 transitions. [2021-06-05 18:22:56,268 INFO L78 Accepts]: Start accepts. Automaton has 159456 states and 433113 transitions. Word has length 458 [2021-06-05 18:22:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 159456 states and 433113 transitions. [2021-06-05 18:22:56,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 159456 states and 433113 transitions. [2021-06-05 18:22:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:22:56,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:56,461 INFO L554 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] [2021-06-05 18:22:56,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:56,662 INFO L430 AbstractCegarLoop]: === Iteration 164 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash 425649250, now seen corresponding path program 107 times [2021-06-05 18:22:56,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:56,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848689950] [2021-06-05 18:22:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:57,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:57,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848689950] [2021-06-05 18:22:57,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848689950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:57,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320172808] [2021-06-05 18:22:57,351 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:57,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:22:58,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320172808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:58,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:58,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:22:58,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450756875] [2021-06-05 18:22:58,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:22:58,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:22:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:22:58,240 INFO L87 Difference]: Start difference. First operand 159456 states and 433113 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:59,596 INFO L93 Difference]: Finished difference Result 255381 states and 690353 transitions. [2021-06-05 18:22:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:59,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:22:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:00,129 INFO L225 Difference]: With dead ends: 255381 [2021-06-05 18:23:00,130 INFO L226 Difference]: Without dead ends: 255381 [2021-06-05 18:23:00,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:23:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255381 states. [2021-06-05 18:23:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255381 to 160716. [2021-06-05 18:23:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160716 states, 160714 states have (on average 2.7163906069166344) internal successors, (436562), 160715 states have internal predecessors, (436562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160716 states to 160716 states and 436562 transitions. [2021-06-05 18:23:02,973 INFO L78 Accepts]: Start accepts. Automaton has 160716 states and 436562 transitions. Word has length 458 [2021-06-05 18:23:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:02,973 INFO L482 AbstractCegarLoop]: Abstraction has 160716 states and 436562 transitions. [2021-06-05 18:23:02,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 160716 states and 436562 transitions. [2021-06-05 18:23:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:03,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:03,175 INFO L554 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] [2021-06-05 18:23:03,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:03,375 INFO L430 AbstractCegarLoop]: === Iteration 165 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1888661504, now seen corresponding path program 108 times [2021-06-05 18:23:03,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801497443] [2021-06-05 18:23:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:03,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801497443] [2021-06-05 18:23:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801497443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089830639] [2021-06-05 18:23:03,553 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:04,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:23:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:04,644 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 18:23:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:04,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089830639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:04,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:04,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:04,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973620885] [2021-06-05 18:23:04,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:04,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:04,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:04,984 INFO L87 Difference]: Start difference. First operand 160716 states and 436562 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:06,021 INFO L93 Difference]: Finished difference Result 270966 states and 732971 transitions. [2021-06-05 18:23:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:06,788 INFO L225 Difference]: With dead ends: 270966 [2021-06-05 18:23:06,788 INFO L226 Difference]: Without dead ends: 270966 [2021-06-05 18:23:06,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:23:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270966 states. [2021-06-05 18:23:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270966 to 162756. [2021-06-05 18:23:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162756 states, 162754 states have (on average 2.7171805301252197) internal successors, (442232), 162755 states have internal predecessors, (442232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162756 states to 162756 states and 442232 transitions. [2021-06-05 18:23:09,679 INFO L78 Accepts]: Start accepts. Automaton has 162756 states and 442232 transitions. Word has length 458 [2021-06-05 18:23:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:09,679 INFO L482 AbstractCegarLoop]: Abstraction has 162756 states and 442232 transitions. [2021-06-05 18:23:09,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 162756 states and 442232 transitions. [2021-06-05 18:23:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:09,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:09,876 INFO L554 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] [2021-06-05 18:23:10,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:10,077 INFO L430 AbstractCegarLoop]: === Iteration 166 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 681886494, now seen corresponding path program 109 times [2021-06-05 18:23:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:10,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683401702] [2021-06-05 18:23:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:10,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683401702] [2021-06-05 18:23:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683401702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003666326] [2021-06-05 18:23:10,253 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003666326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:11,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:11,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288530429] [2021-06-05 18:23:11,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:11,355 INFO L87 Difference]: Start difference. First operand 162756 states and 442232 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:12,358 INFO L93 Difference]: Finished difference Result 256941 states and 694792 transitions. [2021-06-05 18:23:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:13,084 INFO L225 Difference]: With dead ends: 256941 [2021-06-05 18:23:13,084 INFO L226 Difference]: Without dead ends: 256941 [2021-06-05 18:23:13,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256941 states. [2021-06-05 18:23:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256941 to 163436. [2021-06-05 18:23:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163436 states, 163434 states have (on average 2.717439455682416) internal successors, (444122), 163435 states have internal predecessors, (444122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163436 states to 163436 states and 444122 transitions. [2021-06-05 18:23:15,958 INFO L78 Accepts]: Start accepts. Automaton has 163436 states and 444122 transitions. Word has length 458 [2021-06-05 18:23:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:15,958 INFO L482 AbstractCegarLoop]: Abstraction has 163436 states and 444122 transitions. [2021-06-05 18:23:15,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 163436 states and 444122 transitions. [2021-06-05 18:23:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:16,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:16,160 INFO L554 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] [2021-06-05 18:23:16,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 18:23:16,360 INFO L430 AbstractCegarLoop]: === Iteration 167 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:16,361 INFO L82 PathProgramCache]: Analyzing trace with hash 570359228, now seen corresponding path program 110 times [2021-06-05 18:23:16,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:16,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338548825] [2021-06-05 18:23:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:16,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:16,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338548825] [2021-06-05 18:23:16,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338548825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:16,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381690799] [2021-06-05 18:23:16,536 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:17,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:17,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:17,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381690799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:17,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:17,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229734079] [2021-06-05 18:23:17,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:17,571 INFO L87 Difference]: Start difference. First operand 163436 states and 444122 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:18,575 INFO L93 Difference]: Finished difference Result 237326 states and 640671 transitions. [2021-06-05 18:23:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:19,285 INFO L225 Difference]: With dead ends: 237326 [2021-06-05 18:23:19,285 INFO L226 Difference]: Without dead ends: 237326 [2021-06-05 18:23:19,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:23:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237326 states. [2021-06-05 18:23:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237326 to 162076. [2021-06-05 18:23:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162076 states, 162074 states have (on average 2.716919431864457) internal successors, (440342), 162075 states have internal predecessors, (440342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162076 states to 162076 states and 440342 transitions. [2021-06-05 18:23:22,037 INFO L78 Accepts]: Start accepts. Automaton has 162076 states and 440342 transitions. Word has length 458 [2021-06-05 18:23:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:22,037 INFO L482 AbstractCegarLoop]: Abstraction has 162076 states and 440342 transitions. [2021-06-05 18:23:22,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 162076 states and 440342 transitions. [2021-06-05 18:23:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:22,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:22,231 INFO L554 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] [2021-06-05 18:23:22,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 18:23:22,432 INFO L430 AbstractCegarLoop]: === Iteration 168 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1864724220, now seen corresponding path program 111 times [2021-06-05 18:23:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585987512] [2021-06-05 18:23:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:22,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:22,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585987512] [2021-06-05 18:23:22,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585987512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:22,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063964375] [2021-06-05 18:23:22,608 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:23,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:23,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063964375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:23,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:23,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832779663] [2021-06-05 18:23:23,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:23,922 INFO L87 Difference]: Start difference. First operand 162076 states and 440342 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:24,799 INFO L93 Difference]: Finished difference Result 206691 states and 556292 transitions. [2021-06-05 18:23:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:25,096 INFO L225 Difference]: With dead ends: 206691 [2021-06-05 18:23:25,096 INFO L226 Difference]: Without dead ends: 206691 [2021-06-05 18:23:25,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:23:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206691 states. [2021-06-05 18:23:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206691 to 160616. [2021-06-05 18:23:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160616 states, 160614 states have (on average 2.716245159201564) internal successors, (436267), 160615 states have internal predecessors, (436267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160616 states to 160616 states and 436267 transitions. [2021-06-05 18:23:28,316 INFO L78 Accepts]: Start accepts. Automaton has 160616 states and 436267 transitions. Word has length 458 [2021-06-05 18:23:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:28,316 INFO L482 AbstractCegarLoop]: Abstraction has 160616 states and 436267 transitions. [2021-06-05 18:23:28,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 160616 states and 436267 transitions. [2021-06-05 18:23:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:28,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:28,515 INFO L554 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] [2021-06-05 18:23:28,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:28,715 INFO L430 AbstractCegarLoop]: === Iteration 169 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash -401711966, now seen corresponding path program 112 times [2021-06-05 18:23:28,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:28,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816355502] [2021-06-05 18:23:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:28,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:28,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816355502] [2021-06-05 18:23:28,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816355502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:28,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304044552] [2021-06-05 18:23:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:29,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:29,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304044552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:29,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:29,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:29,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932317205] [2021-06-05 18:23:29,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:29,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:29,831 INFO L87 Difference]: Start difference. First operand 160616 states and 436267 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:31,234 INFO L93 Difference]: Finished difference Result 285686 states and 773519 transitions. [2021-06-05 18:23:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:31,625 INFO L225 Difference]: With dead ends: 285686 [2021-06-05 18:23:31,625 INFO L226 Difference]: Without dead ends: 285686 [2021-06-05 18:23:31,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=571, Invalid=1591, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:23:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285686 states. [2021-06-05 18:23:34,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285686 to 165756. [2021-06-05 18:23:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165756 states, 165754 states have (on average 2.7172436260965043) internal successors, (450394), 165755 states have internal predecessors, (450394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165756 states to 165756 states and 450394 transitions. [2021-06-05 18:23:34,998 INFO L78 Accepts]: Start accepts. Automaton has 165756 states and 450394 transitions. Word has length 458 [2021-06-05 18:23:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:34,999 INFO L482 AbstractCegarLoop]: Abstraction has 165756 states and 450394 transitions. [2021-06-05 18:23:34,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 165756 states and 450394 transitions. [2021-06-05 18:23:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:35,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:35,201 INFO L554 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] [2021-06-05 18:23:35,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 18:23:35,401 INFO L430 AbstractCegarLoop]: === Iteration 170 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1608486976, now seen corresponding path program 113 times [2021-06-05 18:23:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96570502] [2021-06-05 18:23:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:35,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96570502] [2021-06-05 18:23:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96570502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991352178] [2021-06-05 18:23:35,578 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:36,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:23:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991352178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:37,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:37,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:37,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606437203] [2021-06-05 18:23:37,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:37,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:37,068 INFO L87 Difference]: Start difference. First operand 165756 states and 450394 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:38,174 INFO L93 Difference]: Finished difference Result 297841 states and 806513 transitions. [2021-06-05 18:23:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:38,981 INFO L225 Difference]: With dead ends: 297841 [2021-06-05 18:23:38,981 INFO L226 Difference]: Without dead ends: 297841 [2021-06-05 18:23:38,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=582, Invalid=1674, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297841 states. [2021-06-05 18:23:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297841 to 172356. [2021-06-05 18:23:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172356 states, 172354 states have (on average 2.7190085521658913) internal successors, (468632), 172355 states have internal predecessors, (468632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172356 states to 172356 states and 468632 transitions. [2021-06-05 18:23:42,055 INFO L78 Accepts]: Start accepts. Automaton has 172356 states and 468632 transitions. Word has length 458 [2021-06-05 18:23:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:42,055 INFO L482 AbstractCegarLoop]: Abstraction has 172356 states and 468632 transitions. [2021-06-05 18:23:42,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 172356 states and 468632 transitions. [2021-06-05 18:23:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:42,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:42,725 INFO L554 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] [2021-06-05 18:23:42,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 18:23:42,942 INFO L430 AbstractCegarLoop]: === Iteration 171 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1720014242, now seen corresponding path program 114 times [2021-06-05 18:23:42,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:42,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437804927] [2021-06-05 18:23:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:43,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437804927] [2021-06-05 18:23:43,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437804927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136650138] [2021-06-05 18:23:43,117 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:43,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:23:43,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:43,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:44,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136650138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:44,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:44,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:44,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592772808] [2021-06-05 18:23:44,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:44,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:44,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:44,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:44,150 INFO L87 Difference]: Start difference. First operand 172356 states and 468632 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:45,559 INFO L93 Difference]: Finished difference Result 273226 states and 738747 transitions. [2021-06-05 18:23:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:45,929 INFO L225 Difference]: With dead ends: 273226 [2021-06-05 18:23:45,929 INFO L226 Difference]: Without dead ends: 273226 [2021-06-05 18:23:45,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=593, Invalid=1759, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:23:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273226 states. [2021-06-05 18:23:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273226 to 171676. [2021-06-05 18:23:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171676 states, 171674 states have (on average 2.71876929529224) internal successors, (466742), 171675 states have internal predecessors, (466742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171676 states to 171676 states and 466742 transitions. [2021-06-05 18:23:49,525 INFO L78 Accepts]: Start accepts. Automaton has 171676 states and 466742 transitions. Word has length 458 [2021-06-05 18:23:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:49,525 INFO L482 AbstractCegarLoop]: Abstraction has 171676 states and 466742 transitions. [2021-06-05 18:23:49,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 171676 states and 466742 transitions. [2021-06-05 18:23:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:49,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:49,742 INFO L554 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] [2021-06-05 18:23:49,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 18:23:49,943 INFO L430 AbstractCegarLoop]: === Iteration 172 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 450744772, now seen corresponding path program 115 times [2021-06-05 18:23:49,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:49,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403335626] [2021-06-05 18:23:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:50,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403335626] [2021-06-05 18:23:50,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403335626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778212061] [2021-06-05 18:23:50,118 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:50,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778212061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:50,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:50,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:50,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596966532] [2021-06-05 18:23:50,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:50,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:50,716 INFO L87 Difference]: Start difference. First operand 171676 states and 466742 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:52,070 INFO L93 Difference]: Finished difference Result 216986 states and 584627 transitions. [2021-06-05 18:23:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:52,399 INFO L225 Difference]: With dead ends: 216986 [2021-06-05 18:23:52,399 INFO L226 Difference]: Without dead ends: 216986 [2021-06-05 18:23:52,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=585, Invalid=1671, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216986 states. [2021-06-05 18:23:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216986 to 170216. [2021-06-05 18:23:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170216 states, 170214 states have (on average 2.7181489184203413) internal successors, (462667), 170215 states have internal predecessors, (462667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170216 states to 170216 states and 462667 transitions. [2021-06-05 18:23:55,274 INFO L78 Accepts]: Start accepts. Automaton has 170216 states and 462667 transitions. Word has length 458 [2021-06-05 18:23:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:55,274 INFO L482 AbstractCegarLoop]: Abstraction has 170216 states and 462667 transitions. [2021-06-05 18:23:55,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 170216 states and 462667 transitions. [2021-06-05 18:23:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:23:55,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:55,984 INFO L554 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] [2021-06-05 18:23:56,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:56,197 INFO L430 AbstractCegarLoop]: === Iteration 173 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash -756030238, now seen corresponding path program 116 times [2021-06-05 18:23:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:56,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018513574] [2021-06-05 18:23:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:56,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018513574] [2021-06-05 18:23:56,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018513574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438047621] [2021-06-05 18:23:56,372 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:56,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:56,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:23:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:23:56,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438047621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:56,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:56,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:23:56,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663793675] [2021-06-05 18:23:56,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:23:56,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:56,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:23:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:23:56,957 INFO L87 Difference]: Start difference. First operand 170216 states and 462667 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:58,421 INFO L93 Difference]: Finished difference Result 296571 states and 803217 transitions. [2021-06-05 18:23:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:23:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:58,824 INFO L225 Difference]: With dead ends: 296571 [2021-06-05 18:23:58,824 INFO L226 Difference]: Without dead ends: 296571 [2021-06-05 18:23:58,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=583, Invalid=1673, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:23:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296571 states. [2021-06-05 18:24:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296571 to 174776. [2021-06-05 18:24:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174776 states, 174774 states have (on average 2.7191401467037433) internal successors, (475235), 174775 states have internal predecessors, (475235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174776 states to 174776 states and 475235 transitions. [2021-06-05 18:24:02,469 INFO L78 Accepts]: Start accepts. Automaton has 174776 states and 475235 transitions. Word has length 458 [2021-06-05 18:24:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:02,469 INFO L482 AbstractCegarLoop]: Abstraction has 174776 states and 475235 transitions. [2021-06-05 18:24:02,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 174776 states and 475235 transitions. [2021-06-05 18:24:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:24:02,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:02,683 INFO L554 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] [2021-06-05 18:24:02,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 18:24:02,883 INFO L430 AbstractCegarLoop]: === Iteration 174 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash -867557504, now seen corresponding path program 117 times [2021-06-05 18:24:02,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:02,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694845509] [2021-06-05 18:24:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:03,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694845509] [2021-06-05 18:24:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694845509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141597669] [2021-06-05 18:24:03,060 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:03,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:24:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:04,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141597669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:04,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:04,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:24:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627838064] [2021-06-05 18:24:04,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:24:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:04,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:24:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:24:04,105 INFO L87 Difference]: Start difference. First operand 174776 states and 475235 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:05,576 INFO L93 Difference]: Finished difference Result 290706 states and 786641 transitions. [2021-06-05 18:24:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:24:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:05,996 INFO L225 Difference]: With dead ends: 290706 [2021-06-05 18:24:05,996 INFO L226 Difference]: Without dead ends: 290706 [2021-06-05 18:24:05,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=594, Invalid=1758, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:24:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290706 states. [2021-06-05 18:24:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290706 to 176716. [2021-06-05 18:24:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176716 states, 176714 states have (on average 2.7195015675045555) internal successors, (480574), 176715 states have internal predecessors, (480574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176716 states to 176716 states and 480574 transitions. [2021-06-05 18:24:09,624 INFO L78 Accepts]: Start accepts. Automaton has 176716 states and 480574 transitions. Word has length 458 [2021-06-05 18:24:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:09,625 INFO L482 AbstractCegarLoop]: Abstraction has 176716 states and 480574 transitions. [2021-06-05 18:24:09,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 176716 states and 480574 transitions. [2021-06-05 18:24:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:24:09,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:09,845 INFO L554 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] [2021-06-05 18:24:10,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:10,046 INFO L430 AbstractCegarLoop]: === Iteration 175 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:10,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1110262404, now seen corresponding path program 118 times [2021-06-05 18:24:10,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:10,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626399933] [2021-06-05 18:24:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:10,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626399933] [2021-06-05 18:24:10,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626399933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991471633] [2021-06-05 18:24:10,224 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:11,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:11,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991471633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:11,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:11,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:24:11,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89213999] [2021-06-05 18:24:11,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:24:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:24:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:24:11,651 INFO L87 Difference]: Start difference. First operand 176716 states and 480574 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:12,557 INFO L93 Difference]: Finished difference Result 217901 states and 587392 transitions. [2021-06-05 18:24:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:24:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:13,223 INFO L225 Difference]: With dead ends: 217901 [2021-06-05 18:24:13,223 INFO L226 Difference]: Without dead ends: 217901 [2021-06-05 18:24:13,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=597, Invalid=1755, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:24:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217901 states. [2021-06-05 18:24:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217901 to 177976. [2021-06-05 18:24:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177976 states, 177974 states have (on average 2.719627586051895) internal successors, (484023), 177975 states have internal predecessors, (484023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177976 states to 177976 states and 484023 transitions. [2021-06-05 18:24:16,077 INFO L78 Accepts]: Start accepts. Automaton has 177976 states and 484023 transitions. Word has length 458 [2021-06-05 18:24:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:16,078 INFO L482 AbstractCegarLoop]: Abstraction has 177976 states and 484023 transitions. [2021-06-05 18:24:16,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 177976 states and 484023 transitions. [2021-06-05 18:24:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:24:16,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:16,296 INFO L554 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] [2021-06-05 18:24:16,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:16,496 INFO L430 AbstractCegarLoop]: === Iteration 176 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 998735138, now seen corresponding path program 119 times [2021-06-05 18:24:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:16,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690391460] [2021-06-05 18:24:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:16,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690391460] [2021-06-05 18:24:16,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690391460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:16,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725078595] [2021-06-05 18:24:16,673 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:17,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:24:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:17,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725078595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:17,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:17,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:24:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326820831] [2021-06-05 18:24:17,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:24:17,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:24:17,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:24:17,968 INFO L87 Difference]: Start difference. First operand 177976 states and 484023 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:19,400 INFO L93 Difference]: Finished difference Result 282706 states and 764809 transitions. [2021-06-05 18:24:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:24:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:19,801 INFO L225 Difference]: With dead ends: 282706 [2021-06-05 18:24:19,801 INFO L226 Difference]: Without dead ends: 282706 [2021-06-05 18:24:19,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=595, Invalid=1757, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:24:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282706 states. [2021-06-05 18:24:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282706 to 180596. [2021-06-05 18:24:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180596 states, 180594 states have (on average 2.720201114101244) internal successors, (491252), 180595 states have internal predecessors, (491252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180596 states to 180596 states and 491252 transitions. [2021-06-05 18:24:23,343 INFO L78 Accepts]: Start accepts. Automaton has 180596 states and 491252 transitions. Word has length 458 [2021-06-05 18:24:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:23,343 INFO L482 AbstractCegarLoop]: Abstraction has 180596 states and 491252 transitions. [2021-06-05 18:24:23,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 180596 states and 491252 transitions. [2021-06-05 18:24:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-06-05 18:24:23,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:23,623 INFO L554 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] [2021-06-05 18:24:23,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:23,823 INFO L430 AbstractCegarLoop]: === Iteration 177 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash 953475908, now seen corresponding path program 120 times [2021-06-05 18:24:23,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:23,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876571831] [2021-06-05 18:24:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:23,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:23,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876571831] [2021-06-05 18:24:23,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876571831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:23,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547087368] [2021-06-05 18:24:23,998 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:24,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:24:24,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 30 proven. 1638 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-06-05 18:24:24,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547087368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:24,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:24,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:24:24,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209252221] [2021-06-05 18:24:24,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:24:24,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:24:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:24:24,967 INFO L87 Difference]: Start difference. First operand 180596 states and 491252 transitions. Second operand has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:26,220 INFO L93 Difference]: Finished difference Result 215221 states and 580427 transitions. [2021-06-05 18:24:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:24:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 458 [2021-06-05 18:24:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:26,520 INFO L225 Difference]: With dead ends: 215221 [2021-06-05 18:24:26,521 INFO L226 Difference]: Without dead ends: 215221 [2021-06-05 18:24:26,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:24:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215221 states. [2021-06-05 18:24:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215221 to 182536. [2021-06-05 18:24:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182536 states, 182534 states have (on average 2.7205397350630567) internal successors, (496591), 182535 states have internal predecessors, (496591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182536 states to 182536 states and 496591 transitions. [2021-06-05 18:24:29,815 INFO L78 Accepts]: Start accepts. Automaton has 182536 states and 496591 transitions. Word has length 458 [2021-06-05 18:24:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:29,815 INFO L482 AbstractCegarLoop]: Abstraction has 182536 states and 496591 transitions. [2021-06-05 18:24:29,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 19.434782608695652) internal successors, (447), 23 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 182536 states and 496591 transitions. [2021-06-05 18:24:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-06-05 18:24:30,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:30,069 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:30,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:30,269 INFO L430 AbstractCegarLoop]: === Iteration 178 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash -250040739, now seen corresponding path program 12 times [2021-06-05 18:24:30,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:30,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836905781] [2021-06-05 18:24:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 36 proven. 2424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:30,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:30,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836905781] [2021-06-05 18:24:30,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836905781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:30,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415340128] [2021-06-05 18:24:30,546 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:31,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:24:31,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 36 proven. 2424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:32,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415340128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:32,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:32,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:24:32,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833009602] [2021-06-05 18:24:32,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:32,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:32,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:32,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:32,367 INFO L87 Difference]: Start difference. First operand 182536 states and 496591 transitions. Second operand has 29 states, 29 states have (on average 17.551724137931036) internal successors, (509), 29 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:33,693 INFO L93 Difference]: Finished difference Result 195455 states and 529536 transitions. [2021-06-05 18:24:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:24:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 17.551724137931036) internal successors, (509), 29 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 462 [2021-06-05 18:24:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:33,926 INFO L225 Difference]: With dead ends: 195455 [2021-06-05 18:24:33,926 INFO L226 Difference]: Without dead ends: 195455 [2021-06-05 18:24:33,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=976, Invalid=1994, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:24:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195455 states. [2021-06-05 18:24:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195455 to 185018. [2021-06-05 18:24:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185018 states, 185016 states have (on average 2.719175638863666) internal successors, (503091), 185017 states have internal predecessors, (503091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185018 states to 185018 states and 503091 transitions. [2021-06-05 18:24:36,651 INFO L78 Accepts]: Start accepts. Automaton has 185018 states and 503091 transitions. Word has length 462 [2021-06-05 18:24:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:36,651 INFO L482 AbstractCegarLoop]: Abstraction has 185018 states and 503091 transitions. [2021-06-05 18:24:36,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 17.551724137931036) internal successors, (509), 29 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 185018 states and 503091 transitions. [2021-06-05 18:24:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-06-05 18:24:37,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:37,482 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:37,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 18:24:37,689 INFO L430 AbstractCegarLoop]: === Iteration 179 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 940059703, now seen corresponding path program 44 times [2021-06-05 18:24:37,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:37,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942565316] [2021-06-05 18:24:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2024 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 18:24:37,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942565316] [2021-06-05 18:24:37,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942565316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584949692] [2021-06-05 18:24:37,917 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:38,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:38,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584949692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:38,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:38,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 26 [2021-06-05 18:24:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464800015] [2021-06-05 18:24:38,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:38,494 INFO L87 Difference]: Start difference. First operand 185018 states and 503091 transitions. Second operand has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:39,824 INFO L93 Difference]: Finished difference Result 203428 states and 549926 transitions. [2021-06-05 18:24:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 463 [2021-06-05 18:24:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:40,073 INFO L225 Difference]: With dead ends: 203428 [2021-06-05 18:24:40,074 INFO L226 Difference]: Without dead ends: 203428 [2021-06-05 18:24:40,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=746, Invalid=1704, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:24:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203428 states. [2021-06-05 18:24:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203428 to 186378. [2021-06-05 18:24:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186378 states, 186376 states have (on average 2.7196151865047002) internal successors, (506871), 186377 states have internal predecessors, (506871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186378 states to 186378 states and 506871 transitions. [2021-06-05 18:24:42,786 INFO L78 Accepts]: Start accepts. Automaton has 186378 states and 506871 transitions. Word has length 463 [2021-06-05 18:24:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:42,786 INFO L482 AbstractCegarLoop]: Abstraction has 186378 states and 506871 transitions. [2021-06-05 18:24:42,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 186378 states and 506871 transitions. [2021-06-05 18:24:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-06-05 18:24:43,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:43,770 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:43,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 18:24:43,986 INFO L430 AbstractCegarLoop]: === Iteration 180 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash -596268331, now seen corresponding path program 45 times [2021-06-05 18:24:43,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:43,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432757383] [2021-06-05 18:24:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:44,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:44,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432757383] [2021-06-05 18:24:44,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432757383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:44,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151232981] [2021-06-05 18:24:44,212 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:45,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:24:45,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:45,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151232981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:45,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:45,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:24:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903018851] [2021-06-05 18:24:45,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:45,541 INFO L87 Difference]: Start difference. First operand 186378 states and 506871 transitions. Second operand has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:46,664 INFO L93 Difference]: Finished difference Result 212713 states and 573663 transitions. [2021-06-05 18:24:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 463 [2021-06-05 18:24:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:46,923 INFO L225 Difference]: With dead ends: 212713 [2021-06-05 18:24:46,924 INFO L226 Difference]: Without dead ends: 212713 [2021-06-05 18:24:46,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=744, Invalid=1706, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:24:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212713 states. [2021-06-05 18:24:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212713 to 185698. [2021-06-05 18:24:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185698 states, 185696 states have (on average 2.7193962174737205) internal successors, (504981), 185697 states have internal predecessors, (504981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185698 states to 185698 states and 504981 transitions. [2021-06-05 18:24:49,760 INFO L78 Accepts]: Start accepts. Automaton has 185698 states and 504981 transitions. Word has length 463 [2021-06-05 18:24:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:49,761 INFO L482 AbstractCegarLoop]: Abstraction has 185698 states and 504981 transitions. [2021-06-05 18:24:49,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 185698 states and 504981 transitions. [2021-06-05 18:24:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-06-05 18:24:50,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:50,478 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:50,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 18:24:50,706 INFO L430 AbstractCegarLoop]: === Iteration 181 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash 689844467, now seen corresponding path program 46 times [2021-06-05 18:24:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:50,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510835727] [2021-06-05 18:24:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:50,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:50,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510835727] [2021-06-05 18:24:50,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510835727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:50,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901595198] [2021-06-05 18:24:50,921 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:51,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:51,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901595198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:51,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:51,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:24:51,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812600334] [2021-06-05 18:24:51,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:51,829 INFO L87 Difference]: Start difference. First operand 185698 states and 504981 transitions. Second operand has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:53,163 INFO L93 Difference]: Finished difference Result 215253 states and 581113 transitions. [2021-06-05 18:24:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:24:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 463 [2021-06-05 18:24:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:53,427 INFO L225 Difference]: With dead ends: 215253 [2021-06-05 18:24:53,427 INFO L226 Difference]: Without dead ends: 215253 [2021-06-05 18:24:53,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 740.0ms TimeCoverageRelationStatistics Valid=757, Invalid=1793, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:24:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215253 states. [2021-06-05 18:24:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215253 to 183658. [2021-06-05 18:24:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183658 states, 183656 states have (on average 2.7187295813912966) internal successors, (499311), 183657 states have internal predecessors, (499311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183658 states to 183658 states and 499311 transitions. [2021-06-05 18:24:56,264 INFO L78 Accepts]: Start accepts. Automaton has 183658 states and 499311 transitions. Word has length 463 [2021-06-05 18:24:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:56,264 INFO L482 AbstractCegarLoop]: Abstraction has 183658 states and 499311 transitions. [2021-06-05 18:24:56,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183658 states and 499311 transitions. [2021-06-05 18:24:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-06-05 18:24:56,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:56,988 INFO L554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:24:57,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:57,206 INFO L430 AbstractCegarLoop]: === Iteration 182 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 295411345, now seen corresponding path program 47 times [2021-06-05 18:24:57,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:57,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798142563] [2021-06-05 18:24:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:57,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798142563] [2021-06-05 18:24:57,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798142563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593527237] [2021-06-05 18:24:57,419 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:58,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:24:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2001 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-06-05 18:24:58,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593527237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:58,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:58,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:24:58,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944049189] [2021-06-05 18:24:58,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:24:58,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:24:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:24:58,531 INFO L87 Difference]: Start difference. First operand 183658 states and 499311 transitions. Second operand has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:59,890 INFO L93 Difference]: Finished difference Result 221728 states and 597708 transitions. [2021-06-05 18:24:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:24:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 463 [2021-06-05 18:24:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:00,176 INFO L225 Difference]: With dead ends: 221728 [2021-06-05 18:25:00,176 INFO L226 Difference]: Without dead ends: 221728 [2021-06-05 18:25:00,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:25:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221728 states. [2021-06-05 18:25:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221728 to 182298. [2021-06-05 18:25:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182298 states, 182296 states have (on average 2.7182768683898715) internal successors, (495531), 182297 states have internal predecessors, (495531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182298 states to 182298 states and 495531 transitions. [2021-06-05 18:25:03,033 INFO L78 Accepts]: Start accepts. Automaton has 182298 states and 495531 transitions. Word has length 463 [2021-06-05 18:25:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:03,033 INFO L482 AbstractCegarLoop]: Abstraction has 182298 states and 495531 transitions. [2021-06-05 18:25:03,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 18.692307692307693) internal successors, (486), 26 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 182298 states and 495531 transitions. Received shutdown request... [2021-06-05 18:25:03,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:03,749 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:25:03,749 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/5) [2021-06-05 18:25:03,751 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 18:25:03,751 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:25:03,751 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:25:03,751 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:25:03,751 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:25:03,751 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:25:03,751 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:25:03,751 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:25:03,751 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:25:03,753 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:25:03,753 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:25:03,753 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/5) [2021-06-05 18:25:03,753 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:25:03,754 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:25:03,754 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:25:03,754 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:25:03,754 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:25:03,754 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:25:03,754 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:25:03,754 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:25:03,754 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-06-05 18:25:03,755 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:25:03,755 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:25:03,755 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/5) [2021-06-05 18:25:03,755 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:25:03,756 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:25:03,756 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:25:03,756 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:25:03,756 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:25:03,756 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:25:03,756 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:25:03,756 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:25:03,756 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1======== [2021-06-05 18:25:03,757 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:25:03,757 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:25:03,757 INFO L301 ceAbstractionStarter]: Result for error location t1 was TIMEOUT (4/5) [2021-06-05 18:25:03,757 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 18:25:03,757 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:25:03,757 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:25:03,757 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:25:03,758 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:25:03,758 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:25:03,758 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:25:03,758 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:25:03,758 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2======== [2021-06-05 18:25:03,758 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-06-05 18:25:03,758 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:25:03,759 INFO L301 ceAbstractionStarter]: Result for error location t2 was TIMEOUT (5/5) [2021-06-05 18:25:03,759 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:25:03,760 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:25:03,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:25:03 BasicIcfg [2021-06-05 18:25:03,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:25:03,760 INFO L168 Benchmark]: Toolchain (without parser) took 715886.79 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 316.0 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory is still 334.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.74 ms. Allocated memory is still 354.4 MB. Free memory was 315.8 MB in the beginning and 290.7 MB in the end (delta: 25.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 354.4 MB. Free memory was 289.8 MB in the beginning and 287.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: Boogie Preprocessor took 17.66 ms. Allocated memory is still 354.4 MB. Free memory was 287.7 MB in the beginning and 285.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: RCFGBuilder took 467.86 ms. Allocated memory is still 354.4 MB. Free memory was 285.6 MB in the beginning and 252.0 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 INFO L168 Benchmark]: TraceAbstraction took 714822.37 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 251.1 MB in the beginning and 11.8 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-05 18:25:03,761 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 354.4 MB. Free memory is still 334.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 522.74 ms. Allocated memory is still 354.4 MB. Free memory was 315.8 MB in the beginning and 290.7 MB in the end (delta: 25.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 354.4 MB. Free memory was 289.8 MB in the beginning and 287.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.66 ms. Allocated memory is still 354.4 MB. Free memory was 287.7 MB in the beginning and 285.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 467.86 ms. Allocated memory is still 354.4 MB. Free memory was 285.6 MB in the beginning and 252.0 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 714822.37 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 251.1 MB in the beginning and 11.8 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 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 IsEmpty was searching accepting run (input had 182298 states). - 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: 714703.8ms, OverallIterations: 182, TraceHistogramMax: 13, EmptinessCheckTime: 28148.0ms, AutomataDifference: 169347.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 228.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27249 SDtfs, 286758 SDslu, 249376 SDs, 0 SdLazy, 28996 SolverSat, 8725 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14826.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76683 GetRequests, 70031 SyntacticMatches, 2 SemanticMatches, 6650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57350 ImplicationChecksByTransitivity, 49801.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=186378occurred in iteration=179, InterpolantAutomatonStates: 5372, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 309616.9ms AutomataMinimizationTime, 182 MinimizatonAttempts, 6843154 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6371.3ms SsaConstructionTime, 45692.1ms SatisfiabilityAnalysisTime, 108517.8ms InterpolantComputationTime, 138672 NumberOfCodeBlocks, 138505 NumberOfCodeBlocksAsserted, 1152 NumberOfCheckSat, 138311 ConstructedInterpolants, 0 QuantifiedInterpolants, 402716 SizeOfPredicates, 3526 NumberOfNonLiveVariables, 133086 ConjunctsInSsa, 3898 ConjunctsInUnsatCore, 361 InterpolantComputations, 4 PerfectInterpolantSequences, 29798/435768 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: 2.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.7ms, 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: 1.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.2ms, 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: t1 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.8ms, 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: t2 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, 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