/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:25:44,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:25:44,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:25:44,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:25:44,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:25:44,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:25:44,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:25:44,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:25:44,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:25:44,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:25:44,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:25:44,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:25:44,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:25:44,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:25:44,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:25:44,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:25:44,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:25:44,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:25:44,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:25:44,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:25:44,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:25:44,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:25:44,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:25:44,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:25:44,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:25:44,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:25:44,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:25:44,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:25:44,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:25:44,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:25:44,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:25:44,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:25:44,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:25:44,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:25:44,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:25:44,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:25:44,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:25:44,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:25:44,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:25:44,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:25:44,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:25:44,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 16:25:44,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:25:44,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:25:44,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:25:44,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:25:44,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:25:44,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:25:44,449 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:25:44,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:25:44,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:25:44,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:25:44,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:25:44,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:25:44,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:25:44,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:25:44,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:25:44,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:25:44,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:25:44,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:25:44,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:25:44,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:25:44,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:25:44,807 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:25:44,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-07-09 16:25:44,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded1cb50/767fa5c3ba7340a79d958f4cd0551946/FLAG6583baff5 [2021-07-09 16:25:45,299 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:25:45,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-07-09 16:25:45,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded1cb50/767fa5c3ba7340a79d958f4cd0551946/FLAG6583baff5 [2021-07-09 16:25:45,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded1cb50/767fa5c3ba7340a79d958f4cd0551946 [2021-07-09 16:25:45,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:25:45,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:25:45,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:25:45,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:25:45,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:25:45,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a28aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45, skipping insertion in model container [2021-07-09 16:25:45,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:25:45,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:25:45,662 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/triangular-longest-2.i[30964,30977] [2021-07-09 16:25:45,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:25:45,669 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:25:45,703 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/triangular-longest-2.i[30964,30977] [2021-07-09 16:25:45,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:25:45,730 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:25:45,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45 WrapperNode [2021-07-09 16:25:45,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:25:45,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:25:45,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:25:45,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:25:45,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:25:45,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:25:45,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:25:45,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:25:45,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... [2021-07-09 16:25:45,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:25:45,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:25:45,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:25:45,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:25:45,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:25:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:25:45,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:25:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:25:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:25:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 16:25:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:25:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:25:45,857 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:25:46,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:25:46,155 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 16:25:46,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:25:46 BoogieIcfgContainer [2021-07-09 16:25:46,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:25:46,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:25:46,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:25:46,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:25:46,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:25:45" (1/3) ... [2021-07-09 16:25:46,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f899bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:25:46, skipping insertion in model container [2021-07-09 16:25:46,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:25:45" (2/3) ... [2021-07-09 16:25:46,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f899bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:25:46, skipping insertion in model container [2021-07-09 16:25:46,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:25:46" (3/3) ... [2021-07-09 16:25:46,164 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-07-09 16:25:46,168 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:25:46,168 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:25:46,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:25:46,168 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:25:46,192 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,192 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,192 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,193 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,194 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,194 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,197 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,197 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,197 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,204 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,205 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,205 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,205 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,205 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,206 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,206 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,212 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,212 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,212 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,212 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,213 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,213 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:25:46,214 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-09 16:25:46,230 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 16:25:46,245 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:25:46,246 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:25:46,246 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:25:46,246 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:25:46,246 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:25:46,246 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:25:46,246 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:25:46,246 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:25:46,254 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-07-09 16:25:46,293 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 16:25:46,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:46,303 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:46,303 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-07-09 16:25:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:46,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951462293] [2021-07-09 16:25:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:46,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951462293] [2021-07-09 16:25:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951462293] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:46,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:46,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:25:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424559265] [2021-07-09 16:25:46,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:25:46,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:46,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:25:46,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:25:46,597 INFO L87 Difference]: Start difference. First operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:46,791 INFO L93 Difference]: Finished difference Result 1582 states and 4288 transitions. [2021-07-09 16:25:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 16:25:46,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 16:25:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:46,845 INFO L225 Difference]: With dead ends: 1582 [2021-07-09 16:25:46,845 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 16:25:46,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:25:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 16:25:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-07-09 16:25:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-07-09 16:25:46,969 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-07-09 16:25:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:46,969 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-07-09 16:25:46,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-07-09 16:25:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 16:25:46,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:46,972 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:46,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:25:46,972 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-07-09 16:25:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:46,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180206168] [2021-07-09 16:25:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:47,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:47,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180206168] [2021-07-09 16:25:47,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180206168] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:47,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:47,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:25:47,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60858399] [2021-07-09 16:25:47,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:25:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:25:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:25:47,102 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:47,218 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-07-09 16:25:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:25:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 16:25:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:47,223 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 16:25:47,223 INFO L226 Difference]: Without dead ends: 920 [2021-07-09 16:25:47,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-09 16:25:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-07-09 16:25:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-07-09 16:25:47,244 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-07-09 16:25:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:47,244 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-07-09 16:25:47,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-07-09 16:25:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:25:47,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:47,246 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:47,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:25:47,246 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash -262940086, now seen corresponding path program 1 times [2021-07-09 16:25:47,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744006586] [2021-07-09 16:25:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744006586] [2021-07-09 16:25:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744006586] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:47,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:47,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:25:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889377255] [2021-07-09 16:25:47,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:25:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:25:47,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:25:47,310 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:47,386 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-07-09 16:25:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:25:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 16:25:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:47,390 INFO L225 Difference]: With dead ends: 1332 [2021-07-09 16:25:47,390 INFO L226 Difference]: Without dead ends: 1072 [2021-07-09 16:25:47,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:25:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-09 16:25:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-07-09 16:25:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-07-09 16:25:47,411 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-07-09 16:25:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:47,411 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-07-09 16:25:47,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-07-09 16:25:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:25:47,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:47,413 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:47,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:25:47,413 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1449045748, now seen corresponding path program 2 times [2021-07-09 16:25:47,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:47,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758527141] [2021-07-09 16:25:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758527141] [2021-07-09 16:25:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758527141] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:25:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:25:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:25:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265851902] [2021-07-09 16:25:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:25:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:25:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:25:47,469 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:47,612 INFO L93 Difference]: Finished difference Result 1676 states and 4552 transitions. [2021-07-09 16:25:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:25:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 16:25:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:47,617 INFO L225 Difference]: With dead ends: 1676 [2021-07-09 16:25:47,617 INFO L226 Difference]: Without dead ends: 1166 [2021-07-09 16:25:47,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:25:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-09 16:25:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 922. [2021-07-09 16:25:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-07-09 16:25:47,637 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-07-09 16:25:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:47,638 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-07-09 16:25:47,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-07-09 16:25:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 16:25:47,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:47,639 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:47,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:25:47,639 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1733061585, now seen corresponding path program 1 times [2021-07-09 16:25:47,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:47,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186227351] [2021-07-09 16:25:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:47,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186227351] [2021-07-09 16:25:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186227351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:47,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853341409] [2021-07-09 16:25:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:47,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:25:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853341409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:47,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:47,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:25:47,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576592608] [2021-07-09 16:25:47,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:25:47,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:25:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:47,942 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:48,185 INFO L93 Difference]: Finished difference Result 2146 states and 5779 transitions. [2021-07-09 16:25:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:25:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 16:25:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:48,190 INFO L225 Difference]: With dead ends: 2146 [2021-07-09 16:25:48,191 INFO L226 Difference]: Without dead ends: 1556 [2021-07-09 16:25:48,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:25:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-07-09 16:25:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1328. [2021-07-09 16:25:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-07-09 16:25:48,231 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-07-09 16:25:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:48,231 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-07-09 16:25:48,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-07-09 16:25:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 16:25:48,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:48,233 INFO L508 BasicCegarLoop]: trace histogram [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] [2021-07-09 16:25:48,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:48,455 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1274253893, now seen corresponding path program 1 times [2021-07-09 16:25:48,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:48,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338449669] [2021-07-09 16:25:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:48,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:48,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338449669] [2021-07-09 16:25:48,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338449669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:48,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455373315] [2021-07-09 16:25:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:25:48,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455373315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:48,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:48,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 16:25:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560551344] [2021-07-09 16:25:48,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:25:48,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:25:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:25:48,699 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:48,888 INFO L93 Difference]: Finished difference Result 2160 states and 5889 transitions. [2021-07-09 16:25:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:25:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 16:25:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:48,894 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 16:25:48,894 INFO L226 Difference]: Without dead ends: 1566 [2021-07-09 16:25:48,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:25:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-09 16:25:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1122. [2021-07-09 16:25:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.735950044603033) internal successors, (3067), 1121 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3067 transitions. [2021-07-09 16:25:48,917 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3067 transitions. Word has length 50 [2021-07-09 16:25:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:48,917 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3067 transitions. [2021-07-09 16:25:48,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3067 transitions. [2021-07-09 16:25:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 16:25:48,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:48,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-07-09 16:25:49,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:49,138 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1431609058, now seen corresponding path program 2 times [2021-07-09 16:25:49,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:49,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640751606] [2021-07-09 16:25:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:49,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:49,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640751606] [2021-07-09 16:25:49,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640751606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736996679] [2021-07-09 16:25:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:49,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:25:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:49,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736996679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:49,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:49,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 16:25:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548939082] [2021-07-09 16:25:49,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:25:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:25:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:25:49,461 INFO L87 Difference]: Start difference. First operand 1122 states and 3067 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:49,691 INFO L93 Difference]: Finished difference Result 2270 states and 6199 transitions. [2021-07-09 16:25:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:25:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 16:25:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:49,698 INFO L225 Difference]: With dead ends: 2270 [2021-07-09 16:25:49,698 INFO L226 Difference]: Without dead ends: 1766 [2021-07-09 16:25:49,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:25:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-07-09 16:25:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1234. [2021-07-09 16:25:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-07-09 16:25:49,724 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-07-09 16:25:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:49,724 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-07-09 16:25:49,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-07-09 16:25:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-09 16:25:49,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:49,726 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-07-09 16:25:49,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:49,943 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1063601238, now seen corresponding path program 3 times [2021-07-09 16:25:49,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:49,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972172388] [2021-07-09 16:25:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:50,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972172388] [2021-07-09 16:25:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972172388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940030103] [2021-07-09 16:25:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:50,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:25:50,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:50,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:25:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:50,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940030103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:50,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:50,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:25:50,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237692013] [2021-07-09 16:25:50,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:25:50,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:25:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:25:50,213 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:50,503 INFO L93 Difference]: Finished difference Result 2966 states and 7989 transitions. [2021-07-09 16:25:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:50,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-07-09 16:25:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:50,512 INFO L225 Difference]: With dead ends: 2966 [2021-07-09 16:25:50,512 INFO L226 Difference]: Without dead ends: 2376 [2021-07-09 16:25:50,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:25:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-07-09 16:25:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1853. [2021-07-09 16:25:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.798596112311015) internal successors, (5183), 1852 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 5183 transitions. [2021-07-09 16:25:50,570 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 5183 transitions. Word has length 60 [2021-07-09 16:25:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:50,570 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 5183 transitions. [2021-07-09 16:25:50,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 5183 transitions. [2021-07-09 16:25:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 16:25:50,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:50,573 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-07-09 16:25:50,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:50,789 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash -869732173, now seen corresponding path program 4 times [2021-07-09 16:25:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:50,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577390638] [2021-07-09 16:25:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:50,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577390638] [2021-07-09 16:25:50,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577390638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507804550] [2021-07-09 16:25:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:50,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:50,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:25:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507804550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:51,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:51,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 16:25:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486776115] [2021-07-09 16:25:51,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:25:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:25:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:25:51,143 INFO L87 Difference]: Start difference. First operand 1853 states and 5183 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:51,478 INFO L93 Difference]: Finished difference Result 2760 states and 7539 transitions. [2021-07-09 16:25:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:25:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 16:25:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:51,486 INFO L225 Difference]: With dead ends: 2760 [2021-07-09 16:25:51,486 INFO L226 Difference]: Without dead ends: 2256 [2021-07-09 16:25:51,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:25:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-07-09 16:25:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2028. [2021-07-09 16:25:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-07-09 16:25:51,519 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-07-09 16:25:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:51,519 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-07-09 16:25:51,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-07-09 16:25:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-09 16:25:51,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:51,522 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-07-09 16:25:51,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:51,737 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1091589415, now seen corresponding path program 5 times [2021-07-09 16:25:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:51,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672809082] [2021-07-09 16:25:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:51,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672809082] [2021-07-09 16:25:51,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672809082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:51,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582972366] [2021-07-09 16:25:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:51,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:25:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:25:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582972366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:52,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:52,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:25:52,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636486558] [2021-07-09 16:25:52,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:25:52,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:25:52,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:25:52,043 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:52,493 INFO L93 Difference]: Finished difference Result 3776 states and 10225 transitions. [2021-07-09 16:25:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-07-09 16:25:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:52,505 INFO L225 Difference]: With dead ends: 3776 [2021-07-09 16:25:52,505 INFO L226 Difference]: Without dead ends: 2876 [2021-07-09 16:25:52,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:25:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-07-09 16:25:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2203. [2021-07-09 16:25:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.8079019073569484) internal successors, (6183), 2202 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6183 transitions. [2021-07-09 16:25:52,550 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6183 transitions. Word has length 70 [2021-07-09 16:25:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:52,550 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6183 transitions. [2021-07-09 16:25:52,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6183 transitions. [2021-07-09 16:25:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 16:25:52,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:52,554 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-07-09 16:25:52,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:52,771 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1253969596, now seen corresponding path program 6 times [2021-07-09 16:25:52,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:52,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741272092] [2021-07-09 16:25:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:52,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:52,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741272092] [2021-07-09 16:25:52,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741272092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:52,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326099388] [2021-07-09 16:25:52,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:52,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:25:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:25:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326099388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:53,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 16:25:53,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878229167] [2021-07-09 16:25:53,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:25:53,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:25:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:25:53,069 INFO L87 Difference]: Start difference. First operand 2203 states and 6183 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:53,446 INFO L93 Difference]: Finished difference Result 3160 states and 8639 transitions. [2021-07-09 16:25:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:25:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-07-09 16:25:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:53,462 INFO L225 Difference]: With dead ends: 3160 [2021-07-09 16:25:53,462 INFO L226 Difference]: Without dead ends: 2656 [2021-07-09 16:25:53,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:25:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-09 16:25:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2378. [2021-07-09 16:25:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-07-09 16:25:53,510 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-07-09 16:25:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:53,510 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-07-09 16:25:53,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-07-09 16:25:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 16:25:53,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:53,517 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-07-09 16:25:53,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,732 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1121801400, now seen corresponding path program 7 times [2021-07-09 16:25:53,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:53,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99783190] [2021-07-09 16:25:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:53,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:53,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99783190] [2021-07-09 16:25:53,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99783190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913077873] [2021-07-09 16:25:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:53,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:25:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913077873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:54,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:54,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:25:54,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779908784] [2021-07-09 16:25:54,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:25:54,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:25:54,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:25:54,072 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:54,620 INFO L93 Difference]: Finished difference Result 4176 states and 11325 transitions. [2021-07-09 16:25:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:25:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-07-09 16:25:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:54,627 INFO L225 Difference]: With dead ends: 4176 [2021-07-09 16:25:54,627 INFO L226 Difference]: Without dead ends: 3276 [2021-07-09 16:25:54,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 500.7ms TimeCoverageRelationStatistics Valid=502, Invalid=1478, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:25:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-07-09 16:25:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2553. [2021-07-09 16:25:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.814655172413793) internal successors, (7183), 2552 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7183 transitions. [2021-07-09 16:25:54,670 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7183 transitions. Word has length 80 [2021-07-09 16:25:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:54,670 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 7183 transitions. [2021-07-09 16:25:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7183 transitions. [2021-07-09 16:25:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-09 16:25:54,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:54,674 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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] [2021-07-09 16:25:54,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 16:25:54,893 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 681848981, now seen corresponding path program 8 times [2021-07-09 16:25:54,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:54,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946458110] [2021-07-09 16:25:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:55,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946458110] [2021-07-09 16:25:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946458110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321115566] [2021-07-09 16:25:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:55,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:55,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:25:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321115566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:55,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:25:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991062517] [2021-07-09 16:25:55,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:25:55,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:25:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:25:55,317 INFO L87 Difference]: Start difference. First operand 2553 states and 7183 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:55,851 INFO L93 Difference]: Finished difference Result 3966 states and 10754 transitions. [2021-07-09 16:25:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:25:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-07-09 16:25:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:55,857 INFO L225 Difference]: With dead ends: 3966 [2021-07-09 16:25:55,857 INFO L226 Difference]: Without dead ends: 3376 [2021-07-09 16:25:55,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:25:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-07-09 16:25:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 1924. [2021-07-09 16:25:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-07-09 16:25:55,890 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-07-09 16:25:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:55,890 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-07-09 16:25:55,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-07-09 16:25:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-07-09 16:25:55,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:55,893 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-07-09 16:25:56,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:56,110 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1723804919, now seen corresponding path program 9 times [2021-07-09 16:25:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:56,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864711201] [2021-07-09 16:25:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:56,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864711201] [2021-07-09 16:25:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864711201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272619249] [2021-07-09 16:25:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:56,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:25:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:25:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272619249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:56,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:56,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:25:56,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196339794] [2021-07-09 16:25:56,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:25:56,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:25:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:25:56,482 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:57,082 INFO L93 Difference]: Finished difference Result 4506 states and 12225 transitions. [2021-07-09 16:25:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:25:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-07-09 16:25:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:57,089 INFO L225 Difference]: With dead ends: 4506 [2021-07-09 16:25:57,089 INFO L226 Difference]: Without dead ends: 3606 [2021-07-09 16:25:57,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=547, Invalid=1805, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:25:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-07-09 16:25:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 2012. [2021-07-09 16:25:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 2.73843858776728) internal successors, (5507), 2011 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 5507 transitions. [2021-07-09 16:25:57,120 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 5507 transitions. Word has length 90 [2021-07-09 16:25:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 2012 states and 5507 transitions. [2021-07-09 16:25:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 5507 transitions. [2021-07-09 16:25:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-09 16:25:57,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:57,123 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 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] [2021-07-09 16:25:57,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:57,341 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1377812826, now seen corresponding path program 10 times [2021-07-09 16:25:57,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:57,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391465297] [2021-07-09 16:25:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:57,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:57,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391465297] [2021-07-09 16:25:57,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391465297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:57,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316261070] [2021-07-09 16:25:57,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:57,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:57,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:25:57,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316261070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:57,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:57,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-09 16:25:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995651982] [2021-07-09 16:25:57,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:25:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:25:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:25:57,694 INFO L87 Difference]: Start difference. First operand 2012 states and 5507 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:58,297 INFO L93 Difference]: Finished difference Result 4370 states and 11975 transitions. [2021-07-09 16:25:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:25:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-07-09 16:25:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:58,304 INFO L225 Difference]: With dead ends: 4370 [2021-07-09 16:25:58,304 INFO L226 Difference]: Without dead ends: 3556 [2021-07-09 16:25:58,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 16:25:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-07-09 16:25:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3078. [2021-07-09 16:25:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.8219044523886905) internal successors, (8683), 3077 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8683 transitions. [2021-07-09 16:25:58,348 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8683 transitions. Word has length 95 [2021-07-09 16:25:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:58,348 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8683 transitions. [2021-07-09 16:25:58,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8683 transitions. [2021-07-09 16:25:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-09 16:25:58,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:58,353 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2021-07-09 16:25:58,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:25:58,570 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1010524186, now seen corresponding path program 11 times [2021-07-09 16:25:58,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:58,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743061498] [2021-07-09 16:25:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:58,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:58,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743061498] [2021-07-09 16:25:58,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743061498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:58,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079554834] [2021-07-09 16:25:58,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:58,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:25:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:25:58,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:25:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079554834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:58,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:58,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-07-09 16:25:58,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628673367] [2021-07-09 16:25:58,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:25:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:25:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:25:58,938 INFO L87 Difference]: Start difference. First operand 3078 states and 8683 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:59,663 INFO L93 Difference]: Finished difference Result 4480 states and 12285 transitions. [2021-07-09 16:25:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:25:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-09 16:25:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:59,669 INFO L225 Difference]: With dead ends: 4480 [2021-07-09 16:25:59,670 INFO L226 Difference]: Without dead ends: 3666 [2021-07-09 16:25:59,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=760, Invalid=1996, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:25:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-07-09 16:25:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2122. [2021-07-09 16:25:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 2.742574257425743) internal successors, (5817), 2121 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 5817 transitions. [2021-07-09 16:25:59,707 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 5817 transitions. Word has length 100 [2021-07-09 16:25:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:59,707 INFO L482 AbstractCegarLoop]: Abstraction has 2122 states and 5817 transitions. [2021-07-09 16:25:59,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 5817 transitions. [2021-07-09 16:25:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-09 16:25:59,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:59,710 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 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] [2021-07-09 16:25:59,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:25:59,927 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1024633719, now seen corresponding path program 12 times [2021-07-09 16:25:59,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:59,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375004663] [2021-07-09 16:25:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:00,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:00,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375004663] [2021-07-09 16:26:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375004663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678757429] [2021-07-09 16:26:00,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:00,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:26:00,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:26:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:00,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678757429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:00,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:00,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:26:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513990621] [2021-07-09 16:26:00,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:26:00,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:26:00,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:26:00,442 INFO L87 Difference]: Start difference. First operand 2122 states and 5817 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:01,133 INFO L93 Difference]: Finished difference Result 4676 states and 12714 transitions. [2021-07-09 16:26:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 16:26:01,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-07-09 16:26:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:01,141 INFO L225 Difference]: With dead ends: 4676 [2021-07-09 16:26:01,141 INFO L226 Difference]: Without dead ends: 4086 [2021-07-09 16:26:01,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 16:26:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-07-09 16:26:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3428. [2021-07-09 16:26:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-07-09 16:26:01,209 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-07-09 16:26:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:01,209 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-07-09 16:26:01,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-07-09 16:26:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-07-09 16:26:01,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:01,213 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2021-07-09 16:26:01,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 16:26:01,433 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash -933655573, now seen corresponding path program 13 times [2021-07-09 16:26:01,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534878376] [2021-07-09 16:26:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:01,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534878376] [2021-07-09 16:26:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534878376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714139397] [2021-07-09 16:26:01,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:26:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714139397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:01,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:01,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:26:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290910944] [2021-07-09 16:26:01,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:26:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:26:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:26:01,808 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:02,602 INFO L93 Difference]: Finished difference Result 4896 states and 13289 transitions. [2021-07-09 16:26:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 16:26:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-07-09 16:26:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:02,608 INFO L225 Difference]: With dead ends: 4896 [2021-07-09 16:26:02,608 INFO L226 Difference]: Without dead ends: 4306 [2021-07-09 16:26:02,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 16:26:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-07-09 16:26:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 2412. [2021-07-09 16:26:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.740356698465367) internal successors, (6607), 2411 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6607 transitions. [2021-07-09 16:26:02,642 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6607 transitions. Word has length 110 [2021-07-09 16:26:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:02,642 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6607 transitions. [2021-07-09 16:26:02,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6607 transitions. [2021-07-09 16:26:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-07-09 16:26:02,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:02,645 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 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] [2021-07-09 16:26:02,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:02,862 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1833208, now seen corresponding path program 14 times [2021-07-09 16:26:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:02,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855273964] [2021-07-09 16:26:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:03,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:03,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855273964] [2021-07-09 16:26:03,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855273964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:03,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183645985] [2021-07-09 16:26:03,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:03,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:03,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183645985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:03,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:03,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:26:03,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882475768] [2021-07-09 16:26:03,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:26:03,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:03,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:26:03,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:26:03,254 INFO L87 Difference]: Start difference. First operand 2412 states and 6607 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:04,137 INFO L93 Difference]: Finished difference Result 5576 states and 15190 transitions. [2021-07-09 16:26:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 16:26:04,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-07-09 16:26:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:04,144 INFO L225 Difference]: With dead ends: 5576 [2021-07-09 16:26:04,145 INFO L226 Difference]: Without dead ends: 4676 [2021-07-09 16:26:04,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=1028, Invalid=3262, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 16:26:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-07-09 16:26:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 2524. [2021-07-09 16:26:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-07-09 16:26:04,190 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-07-09 16:26:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:04,190 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-07-09 16:26:04,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-07-09 16:26:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-07-09 16:26:04,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:04,193 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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] [2021-07-09 16:26:04,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:04,413 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1068754556, now seen corresponding path program 15 times [2021-07-09 16:26:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:04,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280453881] [2021-07-09 16:26:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:04,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:04,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280453881] [2021-07-09 16:26:04,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280453881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:04,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284648039] [2021-07-09 16:26:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:04,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:26:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 16:26:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284648039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:04,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:04,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-07-09 16:26:04,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496093359] [2021-07-09 16:26:04,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:26:04,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:26:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:26:04,856 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:05,645 INFO L93 Difference]: Finished difference Result 5370 states and 14725 transitions. [2021-07-09 16:26:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 16:26:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-07-09 16:26:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:05,653 INFO L225 Difference]: With dead ends: 5370 [2021-07-09 16:26:05,653 INFO L226 Difference]: Without dead ends: 4466 [2021-07-09 16:26:05,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=974, Invalid=2932, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 16:26:05,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2021-07-09 16:26:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2522. [2021-07-09 16:26:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 2.7437524791749306) internal successors, (6917), 2521 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 6917 transitions. [2021-07-09 16:26:05,695 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 6917 transitions. Word has length 120 [2021-07-09 16:26:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:05,695 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 6917 transitions. [2021-07-09 16:26:05,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 6917 transitions. [2021-07-09 16:26:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-07-09 16:26:05,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:05,698 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 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] [2021-07-09 16:26:05,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:05,916 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -762781351, now seen corresponding path program 16 times [2021-07-09 16:26:05,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:05,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040170560] [2021-07-09 16:26:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:06,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:06,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040170560] [2021-07-09 16:26:06,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040170560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:06,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383906021] [2021-07-09 16:26:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:06,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:06,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 16:26:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383906021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-07-09 16:26:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818528615] [2021-07-09 16:26:06,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 16:26:06,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 16:26:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:26:06,404 INFO L87 Difference]: Start difference. First operand 2522 states and 6917 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:07,333 INFO L93 Difference]: Finished difference Result 5070 states and 13899 transitions. [2021-07-09 16:26:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 16:26:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-07-09 16:26:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:07,340 INFO L225 Difference]: With dead ends: 5070 [2021-07-09 16:26:07,341 INFO L226 Difference]: Without dead ends: 4566 [2021-07-09 16:26:07,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 16:26:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-07-09 16:26:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 2634. [2021-07-09 16:26:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-07-09 16:26:07,394 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-07-09 16:26:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:07,394 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-07-09 16:26:07,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-07-09 16:26:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-07-09 16:26:07,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:07,397 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-07-09 16:26:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:26:07,616 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1964048435, now seen corresponding path program 17 times [2021-07-09 16:26:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451354377] [2021-07-09 16:26:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:07,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:07,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451354377] [2021-07-09 16:26:07,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451354377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:07,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424111819] [2021-07-09 16:26:07,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:07,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:26:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:26:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:08,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424111819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:08,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:08,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 16:26:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571115481] [2021-07-09 16:26:08,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:26:08,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:26:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:26:08,075 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:08,995 INFO L93 Difference]: Finished difference Result 5766 states and 15689 transitions. [2021-07-09 16:26:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 16:26:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-07-09 16:26:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:09,003 INFO L225 Difference]: With dead ends: 5766 [2021-07-09 16:26:09,003 INFO L226 Difference]: Without dead ends: 5176 [2021-07-09 16:26:09,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=1449, Invalid=3953, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 16:26:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-07-09 16:26:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4303. [2021-07-09 16:26:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.831938633193863) internal successors, (12183), 4302 states have internal predecessors, (12183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 12183 transitions. [2021-07-09 16:26:09,127 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 12183 transitions. Word has length 130 [2021-07-09 16:26:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:09,127 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 12183 transitions. [2021-07-09 16:26:09,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 12183 transitions. [2021-07-09 16:26:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-07-09 16:26:09,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:09,132 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 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] [2021-07-09 16:26:09,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 16:26:09,333 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2067674518, now seen corresponding path program 18 times [2021-07-09 16:26:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571148210] [2021-07-09 16:26:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:09,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571148210] [2021-07-09 16:26:09,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571148210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744726573] [2021-07-09 16:26:09,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:09,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:26:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 16:26:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744726573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:09,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-07-09 16:26:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777804567] [2021-07-09 16:26:09,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:26:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:26:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:26:09,796 INFO L87 Difference]: Start difference. First operand 4303 states and 12183 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:10,728 INFO L93 Difference]: Finished difference Result 5560 states and 15239 transitions. [2021-07-09 16:26:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 16:26:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-07-09 16:26:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:10,735 INFO L225 Difference]: With dead ends: 5560 [2021-07-09 16:26:10,735 INFO L226 Difference]: Without dead ends: 5056 [2021-07-09 16:26:10,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=1364, Invalid=3892, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 16:26:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-07-09 16:26:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4478. [2021-07-09 16:26:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.832923832923833) internal successors, (12683), 4477 states have internal predecessors, (12683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12683 transitions. [2021-07-09 16:26:10,791 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12683 transitions. Word has length 135 [2021-07-09 16:26:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:10,791 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12683 transitions. [2021-07-09 16:26:10,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12683 transitions. [2021-07-09 16:26:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-07-09 16:26:10,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:10,796 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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] [2021-07-09 16:26:11,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:26:11,013 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1170511906, now seen corresponding path program 19 times [2021-07-09 16:26:11,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:11,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837982024] [2021-07-09 16:26:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:11,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837982024] [2021-07-09 16:26:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837982024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279686096] [2021-07-09 16:26:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 16:26:11,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279686096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:11,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:11,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-09 16:26:11,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024795998] [2021-07-09 16:26:11,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 16:26:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:11,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 16:26:11,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:26:11,472 INFO L87 Difference]: Start difference. First operand 4478 states and 12683 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:12,652 INFO L93 Difference]: Finished difference Result 6576 states and 17925 transitions. [2021-07-09 16:26:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 16:26:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-07-09 16:26:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:12,660 INFO L225 Difference]: With dead ends: 6576 [2021-07-09 16:26:12,661 INFO L226 Difference]: Without dead ends: 5676 [2021-07-09 16:26:12,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1096.8ms TimeCoverageRelationStatistics Valid=1726, Invalid=4754, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 16:26:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-07-09 16:26:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4653. [2021-07-09 16:26:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.833834909716251) internal successors, (13183), 4652 states have internal predecessors, (13183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13183 transitions. [2021-07-09 16:26:12,720 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13183 transitions. Word has length 140 [2021-07-09 16:26:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:12,721 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13183 transitions. [2021-07-09 16:26:12,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13183 transitions. [2021-07-09 16:26:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-07-09 16:26:12,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:12,726 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 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] [2021-07-09 16:26:12,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 16:26:12,941 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:12,941 INFO L82 PathProgramCache]: Analyzing trace with hash -623160773, now seen corresponding path program 20 times [2021-07-09 16:26:12,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:12,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027556176] [2021-07-09 16:26:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:13,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:13,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027556176] [2021-07-09 16:26:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027556176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:13,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468161435] [2021-07-09 16:26:13,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:13,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 16:26:13,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468161435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:13,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:13,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-07-09 16:26:13,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836095703] [2021-07-09 16:26:13,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 16:26:13,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 16:26:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:26:13,473 INFO L87 Difference]: Start difference. First operand 4653 states and 13183 transitions. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:14,449 INFO L93 Difference]: Finished difference Result 5960 states and 16339 transitions. [2021-07-09 16:26:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 16:26:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-07-09 16:26:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:14,456 INFO L225 Difference]: With dead ends: 5960 [2021-07-09 16:26:14,456 INFO L226 Difference]: Without dead ends: 5456 [2021-07-09 16:26:14,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 977.8ms TimeCoverageRelationStatistics Valid=1600, Invalid=4562, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 16:26:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-07-09 16:26:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4828. [2021-07-09 16:26:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.834679925419515) internal successors, (13683), 4827 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13683 transitions. [2021-07-09 16:26:14,509 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13683 transitions. Word has length 145 [2021-07-09 16:26:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:14,509 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13683 transitions. [2021-07-09 16:26:14,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13683 transitions. [2021-07-09 16:26:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-07-09 16:26:14,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:14,515 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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] [2021-07-09 16:26:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 16:26:14,720 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 106278575, now seen corresponding path program 21 times [2021-07-09 16:26:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625578389] [2021-07-09 16:26:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:15,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:15,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625578389] [2021-07-09 16:26:15,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625578389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:15,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483880964] [2021-07-09 16:26:15,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:15,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 16:26:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 16:26:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:15,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483880964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:15,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:15,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-07-09 16:26:15,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770255479] [2021-07-09 16:26:15,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 16:26:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 16:26:15,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:26:15,418 INFO L87 Difference]: Start difference. First operand 4828 states and 13683 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:16,660 INFO L93 Difference]: Finished difference Result 6976 states and 19025 transitions. [2021-07-09 16:26:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 16:26:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-07-09 16:26:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:16,668 INFO L225 Difference]: With dead ends: 6976 [2021-07-09 16:26:16,668 INFO L226 Difference]: Without dead ends: 6076 [2021-07-09 16:26:16,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1258.3ms TimeCoverageRelationStatistics Valid=1708, Invalid=5432, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 16:26:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-07-09 16:26:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5003. [2021-07-09 16:26:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5003 states, 5002 states have (on average 2.83546581367453) internal successors, (14183), 5002 states have internal predecessors, (14183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 14183 transitions. [2021-07-09 16:26:16,727 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 14183 transitions. Word has length 150 [2021-07-09 16:26:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:16,728 INFO L482 AbstractCegarLoop]: Abstraction has 5003 states and 14183 transitions. [2021-07-09 16:26:16,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 14183 transitions. [2021-07-09 16:26:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-07-09 16:26:16,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:16,734 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 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] [2021-07-09 16:26:16,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:16,951 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1320028364, now seen corresponding path program 22 times [2021-07-09 16:26:16,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:16,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835413356] [2021-07-09 16:26:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:17,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:17,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835413356] [2021-07-09 16:26:17,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835413356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:17,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667042501] [2021-07-09 16:26:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:17,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:17,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 16:26:17,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:17,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667042501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:17,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:17,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-07-09 16:26:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95901462] [2021-07-09 16:26:17,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 16:26:17,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:17,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 16:26:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:26:17,486 INFO L87 Difference]: Start difference. First operand 5003 states and 14183 transitions. Second operand has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:18,885 INFO L93 Difference]: Finished difference Result 6766 states and 18454 transitions. [2021-07-09 16:26:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 16:26:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-07-09 16:26:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:18,894 INFO L225 Difference]: With dead ends: 6766 [2021-07-09 16:26:18,894 INFO L226 Difference]: Without dead ends: 6176 [2021-07-09 16:26:18,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1323.8ms TimeCoverageRelationStatistics Valid=2136, Invalid=5696, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 16:26:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-07-09 16:26:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 3324. [2021-07-09 16:26:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 2.7402949142341257) internal successors, (9106), 3323 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 9106 transitions. [2021-07-09 16:26:18,943 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 9106 transitions. Word has length 155 [2021-07-09 16:26:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:18,943 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 9106 transitions. [2021-07-09 16:26:18,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 4.96875) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 9106 transitions. [2021-07-09 16:26:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-07-09 16:26:18,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:18,992 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 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] [2021-07-09 16:26:19,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 16:26:19,208 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:19,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1853463488, now seen corresponding path program 23 times [2021-07-09 16:26:19,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:19,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333802198] [2021-07-09 16:26:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:19,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:19,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333802198] [2021-07-09 16:26:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333802198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:19,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972594843] [2021-07-09 16:26:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:19,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 16:26:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 16:26:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:19,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972594843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:19,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:19,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-07-09 16:26:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27771518] [2021-07-09 16:26:19,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 16:26:19,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 16:26:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:26:19,771 INFO L87 Difference]: Start difference. First operand 3324 states and 9106 transitions. Second operand has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:21,235 INFO L93 Difference]: Finished difference Result 6970 states and 19125 transitions. [2021-07-09 16:26:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 16:26:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-07-09 16:26:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:21,244 INFO L225 Difference]: With dead ends: 6970 [2021-07-09 16:26:21,244 INFO L226 Difference]: Without dead ends: 6066 [2021-07-09 16:26:21,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 1426.1ms TimeCoverageRelationStatistics Valid=2224, Invalid=5608, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 16:26:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2021-07-09 16:26:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 3322. [2021-07-09 16:26:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 2.745257452574526) internal successors, (9117), 3321 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 9117 transitions. [2021-07-09 16:26:21,301 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 9117 transitions. Word has length 160 [2021-07-09 16:26:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:21,301 INFO L482 AbstractCegarLoop]: Abstraction has 3322 states and 9117 transitions. [2021-07-09 16:26:21,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.09375) internal successors, (163), 32 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 9117 transitions. [2021-07-09 16:26:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-07-09 16:26:21,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:21,305 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 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] [2021-07-09 16:26:21,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:21,522 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1868661219, now seen corresponding path program 24 times [2021-07-09 16:26:21,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:21,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359764445] [2021-07-09 16:26:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359764445] [2021-07-09 16:26:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359764445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959574730] [2021-07-09 16:26:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:21,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 16:26:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 16:26:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959574730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:22,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:22,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-07-09 16:26:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9206718] [2021-07-09 16:26:22,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 16:26:22,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 16:26:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:26:22,111 INFO L87 Difference]: Start difference. First operand 3322 states and 9117 transitions. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:23,418 INFO L93 Difference]: Finished difference Result 6670 states and 18299 transitions. [2021-07-09 16:26:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 16:26:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-07-09 16:26:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:23,428 INFO L225 Difference]: With dead ends: 6670 [2021-07-09 16:26:23,428 INFO L226 Difference]: Without dead ends: 6166 [2021-07-09 16:26:23,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 1280.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=6061, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 16:26:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2021-07-09 16:26:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 3434. [2021-07-09 16:26:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-07-09 16:26:23,480 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-07-09 16:26:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:23,481 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-07-09 16:26:23,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-07-09 16:26:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-07-09 16:26:23,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:23,485 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:23,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:26:23,702 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -392030063, now seen corresponding path program 25 times [2021-07-09 16:26:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:23,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918576401] [2021-07-09 16:26:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:24,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918576401] [2021-07-09 16:26:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918576401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505502909] [2021-07-09 16:26:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 16:26:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:24,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505502909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:24,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:24,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-07-09 16:26:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079280818] [2021-07-09 16:26:24,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 16:26:24,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 16:26:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:26:24,350 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:25,865 INFO L93 Difference]: Finished difference Result 6870 states and 18849 transitions. [2021-07-09 16:26:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 16:26:25,865 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-07-09 16:26:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:25,873 INFO L225 Difference]: With dead ends: 6870 [2021-07-09 16:26:25,873 INFO L226 Difference]: Without dead ends: 6366 [2021-07-09 16:26:25,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1531.0ms TimeCoverageRelationStatistics Valid=2531, Invalid=6211, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 16:26:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2021-07-09 16:26:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 3522. [2021-07-09 16:26:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3521 states have (on average 2.7455268389662026) internal successors, (9667), 3521 states have internal predecessors, (9667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 9667 transitions. [2021-07-09 16:26:25,923 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 9667 transitions. Word has length 170 [2021-07-09 16:26:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:25,923 INFO L482 AbstractCegarLoop]: Abstraction has 3522 states and 9667 transitions. [2021-07-09 16:26:25,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 9667 transitions. [2021-07-09 16:26:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-07-09 16:26:25,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:25,927 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:26,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:26,143 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash -929218002, now seen corresponding path program 26 times [2021-07-09 16:26:26,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:26,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493941668] [2021-07-09 16:26:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:26,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:26,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493941668] [2021-07-09 16:26:26,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493941668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:26,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339653898] [2021-07-09 16:26:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:26,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 16:26:26,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339653898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:26,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:26,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-07-09 16:26:26,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744012120] [2021-07-09 16:26:26,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 16:26:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 16:26:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:26:26,830 INFO L87 Difference]: Start difference. First operand 3522 states and 9667 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:28,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:28,401 INFO L93 Difference]: Finished difference Result 7476 states and 20414 transitions. [2021-07-09 16:26:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 16:26:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-07-09 16:26:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:28,413 INFO L225 Difference]: With dead ends: 7476 [2021-07-09 16:26:28,413 INFO L226 Difference]: Without dead ends: 6886 [2021-07-09 16:26:28,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 1527.7ms TimeCoverageRelationStatistics Valid=2510, Invalid=7590, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 16:26:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6886 states. [2021-07-09 16:26:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6886 to 5878. [2021-07-09 16:26:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-07-09 16:26:28,524 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-07-09 16:26:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:28,525 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-07-09 16:26:28,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-07-09 16:26:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-07-09 16:26:28,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:28,531 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:28,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 16:26:28,745 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1141463970, now seen corresponding path program 27 times [2021-07-09 16:26:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:28,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582465383] [2021-07-09 16:26:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:29,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582465383] [2021-07-09 16:26:29,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582465383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461287566] [2021-07-09 16:26:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:29,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-09 16:26:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 16:26:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:29,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461287566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:29,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:29,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-07-09 16:26:29,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500727075] [2021-07-09 16:26:29,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 16:26:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 16:26:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:26:29,422 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:31,117 INFO L93 Difference]: Finished difference Result 7696 states and 20989 transitions. [2021-07-09 16:26:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 16:26:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-07-09 16:26:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:31,127 INFO L225 Difference]: With dead ends: 7696 [2021-07-09 16:26:31,128 INFO L226 Difference]: Without dead ends: 7106 [2021-07-09 16:26:31,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 1666.6ms TimeCoverageRelationStatistics Valid=2530, Invalid=7772, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 16:26:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2021-07-09 16:26:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 3812. [2021-07-09 16:26:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 2.74389923904487) internal successors, (10457), 3811 states have internal predecessors, (10457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 10457 transitions. [2021-07-09 16:26:31,185 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 10457 transitions. Word has length 180 [2021-07-09 16:26:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:31,186 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 10457 transitions. [2021-07-09 16:26:31,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 10457 transitions. [2021-07-09 16:26:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-07-09 16:26:31,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:31,190 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:31,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:31,407 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:31,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1759058689, now seen corresponding path program 28 times [2021-07-09 16:26:31,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:31,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771343898] [2021-07-09 16:26:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771343898] [2021-07-09 16:26:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771343898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717266827] [2021-07-09 16:26:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:31,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:31,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:31,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 16:26:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717266827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:32,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:32,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-07-09 16:26:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20136442] [2021-07-09 16:26:32,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 16:26:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:32,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 16:26:32,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:26:32,072 INFO L87 Difference]: Start difference. First operand 3812 states and 10457 transitions. Second operand has 37 states, 37 states have (on average 5.081081081081081) internal successors, (188), 37 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:33,744 INFO L93 Difference]: Finished difference Result 7970 states and 21875 transitions. [2021-07-09 16:26:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 16:26:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.081081081081081) internal successors, (188), 37 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-07-09 16:26:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:33,755 INFO L225 Difference]: With dead ends: 7970 [2021-07-09 16:26:33,755 INFO L226 Difference]: Without dead ends: 7156 [2021-07-09 16:26:33,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 1640.0ms TimeCoverageRelationStatistics Valid=3066, Invalid=7646, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 16:26:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-07-09 16:26:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 6228. [2021-07-09 16:26:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8397302071623574) internal successors, (17683), 6227 states have internal predecessors, (17683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-07-09 16:26:33,893 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-07-09 16:26:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:33,893 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-07-09 16:26:33,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.081081081081081) internal successors, (188), 37 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-07-09 16:26:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-07-09 16:26:33,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:33,901 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:34,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 16:26:34,117 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2002207373, now seen corresponding path program 29 times [2021-07-09 16:26:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:34,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423379550] [2021-07-09 16:26:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:34,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423379550] [2021-07-09 16:26:34,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423379550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623654273] [2021-07-09 16:26:34,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:34,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-09 16:26:34,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:34,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 16:26:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623654273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-07-09 16:26:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190368054] [2021-07-09 16:26:34,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 16:26:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 16:26:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:26:34,837 INFO L87 Difference]: Start difference. First operand 6228 states and 17683 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:36,609 INFO L93 Difference]: Finished difference Result 8080 states and 22185 transitions. [2021-07-09 16:26:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 16:26:36,610 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-07-09 16:26:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:36,620 INFO L225 Difference]: With dead ends: 8080 [2021-07-09 16:26:36,620 INFO L226 Difference]: Without dead ends: 7266 [2021-07-09 16:26:36,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 1747.8ms TimeCoverageRelationStatistics Valid=3253, Invalid=8089, Unknown=0, NotChecked=0, Total=11342 [2021-07-09 16:26:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-07-09 16:26:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 3922. [2021-07-09 16:26:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 2.745983167559296) internal successors, (10767), 3921 states have internal predecessors, (10767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 10767 transitions. [2021-07-09 16:26:36,678 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 10767 transitions. Word has length 190 [2021-07-09 16:26:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:36,678 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 10767 transitions. [2021-07-09 16:26:36,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 10767 transitions. [2021-07-09 16:26:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-07-09 16:26:36,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:36,682 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:36,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:36,897 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash -700189040, now seen corresponding path program 30 times [2021-07-09 16:26:36,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:36,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005612221] [2021-07-09 16:26:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:37,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005612221] [2021-07-09 16:26:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005612221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689809894] [2021-07-09 16:26:37,342 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:37,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-09 16:26:37,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 16:26:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689809894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:37,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:37,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-07-09 16:26:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366771843] [2021-07-09 16:26:37,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 16:26:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 16:26:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:26:37,654 INFO L87 Difference]: Start difference. First operand 3922 states and 10767 transitions. Second operand has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:39,369 INFO L93 Difference]: Finished difference Result 7870 states and 21599 transitions. [2021-07-09 16:26:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 16:26:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-07-09 16:26:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:39,395 INFO L225 Difference]: With dead ends: 7870 [2021-07-09 16:26:39,395 INFO L226 Difference]: Without dead ends: 7366 [2021-07-09 16:26:39,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 1749.5ms TimeCoverageRelationStatistics Valid=3065, Invalid=8707, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 16:26:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2021-07-09 16:26:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 4034. [2021-07-09 16:26:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 2.74386312918423) internal successors, (11066), 4033 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 11066 transitions. [2021-07-09 16:26:39,465 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11066 transitions. Word has length 195 [2021-07-09 16:26:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:39,465 INFO L482 AbstractCegarLoop]: Abstraction has 4034 states and 11066 transitions. [2021-07-09 16:26:39,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11066 transitions. [2021-07-09 16:26:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-07-09 16:26:39,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:39,469 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:39,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:26:39,680 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash 150523396, now seen corresponding path program 31 times [2021-07-09 16:26:39,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:39,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596250558] [2021-07-09 16:26:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:40,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596250558] [2021-07-09 16:26:40,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596250558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214644625] [2021-07-09 16:26:40,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 16:26:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:40,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214644625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:40,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:40,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-07-09 16:26:40,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970770570] [2021-07-09 16:26:40,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 16:26:40,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 16:26:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1209, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:26:40,448 INFO L87 Difference]: Start difference. First operand 4034 states and 11066 transitions. Second operand has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:42,394 INFO L93 Difference]: Finished difference Result 8070 states and 22149 transitions. [2021-07-09 16:26:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 16:26:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 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 200 [2021-07-09 16:26:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:42,405 INFO L225 Difference]: With dead ends: 8070 [2021-07-09 16:26:42,405 INFO L226 Difference]: Without dead ends: 7566 [2021-07-09 16:26:42,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 1931.1ms TimeCoverageRelationStatistics Valid=3626, Invalid=8806, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 16:26:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7566 states. [2021-07-09 16:26:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7566 to 4122. [2021-07-09 16:26:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 2.7461781121087117) internal successors, (11317), 4121 states have internal predecessors, (11317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 11317 transitions. [2021-07-09 16:26:42,460 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 11317 transitions. Word has length 200 [2021-07-09 16:26:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:42,461 INFO L482 AbstractCegarLoop]: Abstraction has 4122 states and 11317 transitions. [2021-07-09 16:26:42,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.075) internal successors, (203), 40 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 11317 transitions. [2021-07-09 16:26:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-07-09 16:26:42,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:42,465 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:42,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:26:42,681 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 445187809, now seen corresponding path program 32 times [2021-07-09 16:26:42,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:42,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650441995] [2021-07-09 16:26:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 1346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:43,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650441995] [2021-07-09 16:26:43,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650441995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984942528] [2021-07-09 16:26:43,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:43,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:43,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 16:26:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 1346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:43,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984942528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:43,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:43,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-07-09 16:26:43,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378777615] [2021-07-09 16:26:43,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 16:26:43,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 16:26:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:26:43,454 INFO L87 Difference]: Start difference. First operand 4122 states and 11317 transitions. Second operand has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:45,358 INFO L93 Difference]: Finished difference Result 8270 states and 22699 transitions. [2021-07-09 16:26:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 16:26:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-07-09 16:26:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:45,370 INFO L225 Difference]: With dead ends: 8270 [2021-07-09 16:26:45,370 INFO L226 Difference]: Without dead ends: 7766 [2021-07-09 16:26:45,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 1868.1ms TimeCoverageRelationStatistics Valid=3415, Invalid=9695, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 16:26:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-07-09 16:26:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 4234. [2021-07-09 16:26:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 2.7441530829199148) internal successors, (11616), 4233 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 11616 transitions. [2021-07-09 16:26:45,432 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 11616 transitions. Word has length 205 [2021-07-09 16:26:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:45,432 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 11616 transitions. [2021-07-09 16:26:45,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 11616 transitions. [2021-07-09 16:26:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-07-09 16:26:45,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:45,437 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:45,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:26:45,653 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash 100539733, now seen corresponding path program 33 times [2021-07-09 16:26:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:45,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773801163] [2021-07-09 16:26:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773801163] [2021-07-09 16:26:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773801163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428381899] [2021-07-09 16:26:46,111 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:46,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 16:26:46,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 16:26:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:46,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428381899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:46,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:46,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-07-09 16:26:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178839040] [2021-07-09 16:26:46,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 16:26:46,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 16:26:46,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:46,523 INFO L87 Difference]: Start difference. First operand 4234 states and 11616 transitions. Second operand has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:48,577 INFO L93 Difference]: Finished difference Result 8966 states and 24489 transitions. [2021-07-09 16:26:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 16:26:48,578 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 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 210 [2021-07-09 16:26:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:48,589 INFO L225 Difference]: With dead ends: 8966 [2021-07-09 16:26:48,589 INFO L226 Difference]: Without dead ends: 8376 [2021-07-09 16:26:48,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 2041.9ms TimeCoverageRelationStatistics Valid=3538, Invalid=10742, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 16:26:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-07-09 16:26:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7103. [2021-07-09 16:26:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 2.841875528020276) internal successors, (20183), 7102 states have internal predecessors, (20183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 20183 transitions. [2021-07-09 16:26:48,674 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 20183 transitions. Word has length 210 [2021-07-09 16:26:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:48,675 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 20183 transitions. [2021-07-09 16:26:48,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 20183 transitions. [2021-07-09 16:26:48,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-07-09 16:26:48,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:48,683 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:48,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 16:26:48,897 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -199842318, now seen corresponding path program 34 times [2021-07-09 16:26:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:48,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979888834] [2021-07-09 16:26:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:49,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979888834] [2021-07-09 16:26:49,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979888834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:49,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537045867] [2021-07-09 16:26:49,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:49,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:49,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 16:26:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:49,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537045867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:49,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:49,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2021-07-09 16:26:49,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656141198] [2021-07-09 16:26:49,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 16:26:49,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:49,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 16:26:49,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:49,766 INFO L87 Difference]: Start difference. First operand 7103 states and 20183 transitions. Second operand has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:52,029 INFO L93 Difference]: Finished difference Result 9166 states and 25054 transitions. [2021-07-09 16:26:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 16:26:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-07-09 16:26:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:52,043 INFO L225 Difference]: With dead ends: 9166 [2021-07-09 16:26:52,043 INFO L226 Difference]: Without dead ends: 8576 [2021-07-09 16:26:52,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4533 ImplicationChecksByTransitivity, 2248.5ms TimeCoverageRelationStatistics Valid=4350, Invalid=11150, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 16:26:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-07-09 16:26:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 4524. [2021-07-09 16:26:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 2.7428697766968826) internal successors, (12406), 4523 states have internal predecessors, (12406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 12406 transitions. [2021-07-09 16:26:52,114 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 12406 transitions. Word has length 215 [2021-07-09 16:26:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:52,114 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 12406 transitions. [2021-07-09 16:26:52,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 44 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 12406 transitions. [2021-07-09 16:26:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-07-09 16:26:52,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:52,119 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:52,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:26:52,336 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -263636122, now seen corresponding path program 35 times [2021-07-09 16:26:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:52,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302968336] [2021-07-09 16:26:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:52,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302968336] [2021-07-09 16:26:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302968336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288295088] [2021-07-09 16:26:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:53,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-09 16:26:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:53,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 16:26:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288295088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:53,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:53,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2021-07-09 16:26:53,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855515212] [2021-07-09 16:26:53,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 16:26:53,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 16:26:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:26:53,321 INFO L87 Difference]: Start difference. First operand 4524 states and 12406 transitions. Second operand has 45 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:55,839 INFO L93 Difference]: Finished difference Result 9706 states and 26525 transitions. [2021-07-09 16:26:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 16:26:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-07-09 16:26:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:55,851 INFO L225 Difference]: With dead ends: 9706 [2021-07-09 16:26:55,851 INFO L226 Difference]: Without dead ends: 8806 [2021-07-09 16:26:55,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 2562.8ms TimeCoverageRelationStatistics Valid=4590, Invalid=11922, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 16:26:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8806 states. [2021-07-09 16:26:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8806 to 4612. [2021-07-09 16:26:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.744957709824333) internal successors, (12657), 4611 states have internal predecessors, (12657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 12657 transitions. [2021-07-09 16:26:55,923 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 12657 transitions. Word has length 220 [2021-07-09 16:26:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:55,923 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 12657 transitions. [2021-07-09 16:26:55,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 12657 transitions. [2021-07-09 16:26:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:26:55,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:55,929 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:56,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 16:26:56,145 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash -275160125, now seen corresponding path program 36 times [2021-07-09 16:26:56,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:56,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347452382] [2021-07-09 16:26:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:56,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347452382] [2021-07-09 16:26:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347452382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:56,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468733848] [2021-07-09 16:26:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:56,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-09 16:26:56,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 16:26:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468733848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:57,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2021-07-09 16:26:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001302161] [2021-07-09 16:26:57,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 16:26:57,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 16:26:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1617, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:26:57,056 INFO L87 Difference]: Start difference. First operand 4612 states and 12657 transitions. Second operand has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 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) [2021-07-09 16:26:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:59,480 INFO L93 Difference]: Finished difference Result 9976 states and 27290 transitions. [2021-07-09 16:26:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 16:26:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 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 225 [2021-07-09 16:26:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:59,494 INFO L225 Difference]: With dead ends: 9976 [2021-07-09 16:26:59,494 INFO L226 Difference]: Without dead ends: 9076 [2021-07-09 16:26:59,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 2371.0ms TimeCoverageRelationStatistics Valid=4295, Invalid=12997, Unknown=0, NotChecked=0, Total=17292 [2021-07-09 16:26:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9076 states. [2021-07-09 16:26:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9076 to 4724. [2021-07-09 16:26:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.743171712894347) internal successors, (12956), 4723 states have internal predecessors, (12956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 12956 transitions. [2021-07-09 16:26:59,568 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 12956 transitions. Word has length 225 [2021-07-09 16:26:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:59,568 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 12956 transitions. [2021-07-09 16:26:59,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 4.978260869565218) internal successors, (229), 46 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) [2021-07-09 16:26:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 12956 transitions. [2021-07-09 16:26:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-07-09 16:26:59,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:59,573 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:59,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 16:26:59,790 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1760999479, now seen corresponding path program 37 times [2021-07-09 16:26:59,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:59,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362957496] [2021-07-09 16:26:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-09 16:26:59,806 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-09 16:26:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-09 16:26:59,838 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-09 16:26:59,894 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-09 16:26:59,894 INFO L609 BasicCegarLoop]: Counterexample might be feasible [2021-07-09 16:26:59,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-07-09 16:26:59,897 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:27:00,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:27:00 BasicIcfg [2021-07-09 16:27:00,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:27:00,045 INFO L168 Benchmark]: Toolchain (without parser) took 74716.86 ms. Allocated memory was 188.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 151.2 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 732.7 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 169.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.20 ms. Allocated memory is still 188.7 MB. Free memory was 151.1 MB in the beginning and 162.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.51 ms. Allocated memory is still 188.7 MB. Free memory was 162.4 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: Boogie Preprocessor took 27.57 ms. Allocated memory is still 188.7 MB. Free memory was 160.3 MB in the beginning and 159.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: RCFGBuilder took 352.04 ms. Allocated memory is still 188.7 MB. Free memory was 158.7 MB in the beginning and 137.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,045 INFO L168 Benchmark]: TraceAbstraction took 73887.02 ms. Allocated memory was 188.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 137.2 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 717.2 MB. Max. memory is 8.0 GB. [2021-07-09 16:27:00,046 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 188.7 MB. Free memory is still 169.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 401.20 ms. Allocated memory is still 188.7 MB. Free memory was 151.1 MB in the beginning and 162.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.51 ms. Allocated memory is still 188.7 MB. Free memory was 162.4 MB in the beginning and 160.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.57 ms. Allocated memory is still 188.7 MB. Free memory was 160.3 MB in the beginning and 159.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 352.04 ms. Allocated memory is still 188.7 MB. Free memory was 158.7 MB in the beginning and 137.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 73887.02 ms. Allocated memory was 188.7 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 137.2 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 717.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5, k++=4] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5, k++=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6, k++=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8, k++=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9, k++=9] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=10, k++=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=10] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=11, k++=10] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=11, k++=10] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12, k++=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12, k++=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12, k++=12] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12, k++=12] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13, k++=13] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13, k++=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=14, k++=14] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15, k++=14] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15, k++=15] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15, k++=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=17, k=16] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17, k++=16] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17, k++=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=17, k++=17] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=17, k++=17] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18, k++=18] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18, k++=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L716] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L719] 0 int condJ = j >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 73650.9ms, OverallIterations: 42, TraceHistogramMax: 20, EmptinessCheckTime: 208.4ms, AutomataDifference: 42705.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4511 SDtfs, 55984 SDslu, 42648 SDs, 0 SdLazy, 8650 SolverSat, 7109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5352.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7725 GetRequests, 4984 SyntacticMatches, 0 SemanticMatches, 2741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65995 ImplicationChecksByTransitivity, 40578.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7103occurred in iteration=38, InterpolantAutomatonStates: 2040, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2210.2ms AutomataMinimizationTime, 41 MinimizatonAttempts, 66321 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 562.9ms SsaConstructionTime, 1647.2ms SatisfiabilityAnalysisTime, 16247.1ms InterpolantComputationTime, 10368 NumberOfCodeBlocks, 10368 NumberOfCodeBlocksAsserted, 292 NumberOfCheckSat, 10060 ConstructedInterpolants, 0 QuantifiedInterpolants, 30330 SizeOfPredicates, 814 NumberOfNonLiveVariables, 9768 ConjunctsInSsa, 1017 ConjunctsInUnsatCore, 78 InterpolantComputations, 4 PerfectInterpolantSequences, 0/43282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...