/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:18:29,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:18:29,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:18:29,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:18:29,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:18:29,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:18:29,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:18:29,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:18:29,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:18:29,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:18:29,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:18:29,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:18:29,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:18:29,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:18:29,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:18:29,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:18:29,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:18:29,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:18:29,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:18:29,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:18:29,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:18:29,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:18:29,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:18:29,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:18:29,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:18:29,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:18:29,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:18:29,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:18:29,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:18:29,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:18:29,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:18:29,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:18:29,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:18:29,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:18:29,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:18:29,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:18:29,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:18:29,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:18:29,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:18:29,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:18:29,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:18:29,570 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 16:18:29,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:18:29,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:18:29,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:18:29,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:18:29,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:18:29,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:18:29,609 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:18:29,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:18:29,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:18:29,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:18:29,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:18:29,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:18:29,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:18:29,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:18:29,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:18:29,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:18:29,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:18:29,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:18:29,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:18:29,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:18:29,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:18:29,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:18:29,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:18:29,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:18:29,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:18:29,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:18:29,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:18:29,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:18:29,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:18:29,614 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:18:29,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:18:29,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:18:29,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:18:29,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:18:29,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:18:29,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:18:29,944 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:18:29,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2021-07-09 16:18:30,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f806e0aea/cda7aac8bf1944669ef45e61af7f8062/FLAG26b0797f9 [2021-07-09 16:18:30,628 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:18:30,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2021-07-09 16:18:30,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f806e0aea/cda7aac8bf1944669ef45e61af7f8062/FLAG26b0797f9 [2021-07-09 16:18:30,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f806e0aea/cda7aac8bf1944669ef45e61af7f8062 [2021-07-09 16:18:30,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:18:30,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:18:30,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:18:30,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:18:30,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:18:30,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:18:30" (1/1) ... [2021-07-09 16:18:30,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c52ce27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:30, skipping insertion in model container [2021-07-09 16:18:30,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:18:30" (1/1) ... [2021-07-09 16:18:31,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:18:31,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:18:31,381 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2021-07-09 16:18:31,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:18:31,409 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:18:31,435 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2021-07-09 16:18:31,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:18:31,492 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:18:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31 WrapperNode [2021-07-09 16:18:31,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:18:31,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:18:31,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:18:31,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:18:31,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:18:31,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:18:31,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:18:31,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:18:31,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (1/1) ... [2021-07-09 16:18:31,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:18:31,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:18:31,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:18:31,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:18:31,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (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 16:18:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:18:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:18:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:18:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:18:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:18:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:18:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:18:31,668 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 16:18:32,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:18:32,170 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-07-09 16:18:32,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:18:32 BoogieIcfgContainer [2021-07-09 16:18:32,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:18:32,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:18:32,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:18:32,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:18:32,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:18:30" (1/3) ... [2021-07-09 16:18:32,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763cc38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:18:32, skipping insertion in model container [2021-07-09 16:18:32,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:18:31" (2/3) ... [2021-07-09 16:18:32,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763cc38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:18:32, skipping insertion in model container [2021-07-09 16:18:32,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:18:32" (3/3) ... [2021-07-09 16:18:32,182 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2021-07-09 16:18:32,191 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:18:32,191 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:18:32,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-09 16:18:32,192 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,238 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,239 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,240 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,243 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,244 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,244 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,244 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,244 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,245 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,245 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,245 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,245 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,245 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,246 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,247 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,248 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,250 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,250 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,250 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,250 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,250 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,252 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,252 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,252 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,257 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,259 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,260 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,260 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,260 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,267 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,272 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,274 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,276 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,276 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,276 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,276 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,277 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,287 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,290 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,291 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,295 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,295 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,299 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,299 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,299 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret41| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,301 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,302 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,302 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,302 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:18:32,319 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 16:18:32,340 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:18:32,366 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:18:32,366 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:18:32,366 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:18:32,366 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:18:32,366 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:18:32,366 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:18:32,366 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:18:32,367 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-09 16:18:32,380 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:18:32,647 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 16:18:32,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:32,704 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:32,704 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -712665903, now seen corresponding path program 1 times [2021-07-09 16:18:32,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676700381] [2021-07-09 16:18:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:33,045 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 16:18:33,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676700381] [2021-07-09 16:18:33,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676700381] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:18:33,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:18:33,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:18:33,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706613645] [2021-07-09 16:18:33,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:18:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:33,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:18:33,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:18:33,088 INFO L87 Difference]: Start difference. First operand has 7813 states, 7811 states have (on average 2.8641659198566125) internal successors, (22372), 7812 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:33,281 INFO L93 Difference]: Finished difference Result 10818 states and 29690 transitions. [2021-07-09 16:18:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:18:33,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 16:18:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:33,410 INFO L225 Difference]: With dead ends: 10818 [2021-07-09 16:18:33,411 INFO L226 Difference]: Without dead ends: 10548 [2021-07-09 16:18:33,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:18:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10548 states. [2021-07-09 16:18:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10548 to 10224. [2021-07-09 16:18:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10222 states have (on average 2.759929563686167) internal successors, (28212), 10223 states have internal predecessors, (28212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 28212 transitions. [2021-07-09 16:18:33,932 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 28212 transitions. Word has length 54 [2021-07-09 16:18:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 28212 transitions. [2021-07-09 16:18:33,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 28212 transitions. [2021-07-09 16:18:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 16:18:33,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:33,946 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:33,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:18:33,947 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash -89293531, now seen corresponding path program 1 times [2021-07-09 16:18:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:33,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788774069] [2021-07-09 16:18:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:34,083 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 16:18:34,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:34,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788774069] [2021-07-09 16:18:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788774069] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:18:34,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:18:34,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 16:18:34,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431615097] [2021-07-09 16:18:34,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 16:18:34,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 16:18:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 16:18:34,087 INFO L87 Difference]: Start difference. First operand 10224 states and 28212 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:34,242 INFO L93 Difference]: Finished difference Result 15012 states and 41360 transitions. [2021-07-09 16:18:34,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 16:18:34,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-09 16:18:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:34,431 INFO L225 Difference]: With dead ends: 15012 [2021-07-09 16:18:34,431 INFO L226 Difference]: Without dead ends: 15012 [2021-07-09 16:18:34,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 16:18:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15012 states. [2021-07-09 16:18:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15012 to 10980. [2021-07-09 16:18:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10978 states have (on average 2.7589724904354163) internal successors, (30288), 10979 states have internal predecessors, (30288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 30288 transitions. [2021-07-09 16:18:34,869 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 30288 transitions. Word has length 63 [2021-07-09 16:18:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:34,869 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 30288 transitions. [2021-07-09 16:18:34,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 30288 transitions. [2021-07-09 16:18:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-07-09 16:18:34,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:34,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:34,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:18:34,881 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash -835995566, now seen corresponding path program 1 times [2021-07-09 16:18:34,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:34,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974512937] [2021-07-09 16:18:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:35,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974512937] [2021-07-09 16:18:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974512937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201248676] [2021-07-09 16:18:35,088 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 16:18:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 16:18:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:35,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201248676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:35,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:35,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 16:18:35,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905968236] [2021-07-09 16:18:35,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:18:35,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:18:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:18:35,418 INFO L87 Difference]: Start difference. First operand 10980 states and 30288 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:35,686 INFO L93 Difference]: Finished difference Result 18555 states and 50921 transitions. [2021-07-09 16:18:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 16:18:35,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-07-09 16:18:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:35,755 INFO L225 Difference]: With dead ends: 18555 [2021-07-09 16:18:35,756 INFO L226 Difference]: Without dead ends: 18555 [2021-07-09 16:18:35,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:18:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18555 states. [2021-07-09 16:18:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18555 to 14604. [2021-07-09 16:18:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14604 states, 14602 states have (on average 2.753116011505273) internal successors, (40201), 14603 states have internal predecessors, (40201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 40201 transitions. [2021-07-09 16:18:36,292 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 40201 transitions. Word has length 88 [2021-07-09 16:18:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:36,294 INFO L482 AbstractCegarLoop]: Abstraction has 14604 states and 40201 transitions. [2021-07-09 16:18:36,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 40201 transitions. [2021-07-09 16:18:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-09 16:18:36,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:36,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:36,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 16:18:36,643 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:36,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1529144013, now seen corresponding path program 1 times [2021-07-09 16:18:36,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:36,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575868180] [2021-07-09 16:18:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 16:18:36,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:36,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575868180] [2021-07-09 16:18:36,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575868180] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:18:36,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:18:36,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 16:18:36,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105150838] [2021-07-09 16:18:36,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 16:18:36,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 16:18:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:18:36,729 INFO L87 Difference]: Start difference. First operand 14604 states and 40201 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:36,768 INFO L93 Difference]: Finished difference Result 6196 states and 15963 transitions. [2021-07-09 16:18:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 16:18:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-07-09 16:18:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:36,786 INFO L225 Difference]: With dead ends: 6196 [2021-07-09 16:18:36,786 INFO L226 Difference]: Without dead ends: 6076 [2021-07-09 16:18:36,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 16:18:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-07-09 16:18:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 5876. [2021-07-09 16:18:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5874 states have (on average 2.5718420156622406) internal successors, (15107), 5875 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 15107 transitions. [2021-07-09 16:18:36,954 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 15107 transitions. Word has length 109 [2021-07-09 16:18:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:36,961 INFO L482 AbstractCegarLoop]: Abstraction has 5876 states and 15107 transitions. [2021-07-09 16:18:36,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 15107 transitions. [2021-07-09 16:18:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-09 16:18:36,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:36,983 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:36,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:18:36,983 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1832797293, now seen corresponding path program 2 times [2021-07-09 16:18:36,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:36,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555834800] [2021-07-09 16:18:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555834800] [2021-07-09 16:18:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555834800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52813193] [2021-07-09 16:18:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:37,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:18:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:18:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52813193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:37,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:37,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 16:18:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914115666] [2021-07-09 16:18:37,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 16:18:37,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:37,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 16:18:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:18:37,450 INFO L87 Difference]: Start difference. First operand 5876 states and 15107 transitions. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:37,649 INFO L93 Difference]: Finished difference Result 9595 states and 24725 transitions. [2021-07-09 16:18:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:18:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-07-09 16:18:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:37,676 INFO L225 Difference]: With dead ends: 9595 [2021-07-09 16:18:37,676 INFO L226 Difference]: Without dead ends: 9595 [2021-07-09 16:18:37,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:18:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9595 states. [2021-07-09 16:18:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9595 to 7678. [2021-07-09 16:18:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7676 states have (on average 2.568655549765503) internal successors, (19717), 7677 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 19717 transitions. [2021-07-09 16:18:37,879 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 19717 transitions. Word has length 122 [2021-07-09 16:18:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:37,879 INFO L482 AbstractCegarLoop]: Abstraction has 7678 states and 19717 transitions. [2021-07-09 16:18:37,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 19717 transitions. [2021-07-09 16:18:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-07-09 16:18:37,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:37,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:38,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:38,120 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash 989155091, now seen corresponding path program 1 times [2021-07-09 16:18:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:38,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776743751] [2021-07-09 16:18:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:38,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776743751] [2021-07-09 16:18:38,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776743751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257358811] [2021-07-09 16:18:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 16:18:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:38,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257358811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:38,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:38,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-09 16:18:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553914020] [2021-07-09 16:18:38,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 16:18:38,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 16:18:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 16:18:38,555 INFO L87 Difference]: Start difference. First operand 7678 states and 19717 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:38,728 INFO L93 Difference]: Finished difference Result 11373 states and 29306 transitions. [2021-07-09 16:18:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 16:18:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-07-09 16:18:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:38,758 INFO L225 Difference]: With dead ends: 11373 [2021-07-09 16:18:38,758 INFO L226 Difference]: Without dead ends: 11373 [2021-07-09 16:18:38,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:18:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-07-09 16:18:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 8938. [2021-07-09 16:18:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8936 states have (on average 2.5924350940017904) internal successors, (23166), 8937 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 23166 transitions. [2021-07-09 16:18:38,997 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 23166 transitions. Word has length 123 [2021-07-09 16:18:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:38,997 INFO L482 AbstractCegarLoop]: Abstraction has 8938 states and 23166 transitions. [2021-07-09 16:18:38,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 23166 transitions. [2021-07-09 16:18:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-07-09 16:18:39,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:39,020 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:39,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:39,233 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1495248532, now seen corresponding path program 3 times [2021-07-09 16:18:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:39,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278771886] [2021-07-09 16:18:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278771886] [2021-07-09 16:18:39,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278771886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851936357] [2021-07-09 16:18:39,347 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 16:18:39,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:18:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:18:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851936357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:39,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 16:18:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578088293] [2021-07-09 16:18:39,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:18:39,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:18:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:18:39,736 INFO L87 Difference]: Start difference. First operand 8938 states and 23166 transitions. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:39,935 INFO L93 Difference]: Finished difference Result 13937 states and 35971 transitions. [2021-07-09 16:18:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 16:18:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-07-09 16:18:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:39,969 INFO L225 Difference]: With dead ends: 13937 [2021-07-09 16:18:39,969 INFO L226 Difference]: Without dead ends: 13937 [2021-07-09 16:18:39,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:18:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2021-07-09 16:18:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 10740. [2021-07-09 16:18:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10740 states, 10738 states have (on average 2.5867014341590613) internal successors, (27776), 10739 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10740 states to 10740 states and 27776 transitions. [2021-07-09 16:18:40,287 INFO L78 Accepts]: Start accepts. Automaton has 10740 states and 27776 transitions. Word has length 156 [2021-07-09 16:18:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:40,287 INFO L482 AbstractCegarLoop]: Abstraction has 10740 states and 27776 transitions. [2021-07-09 16:18:40,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10740 states and 27776 transitions. [2021-07-09 16:18:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-07-09 16:18:40,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:40,309 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:40,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:40,539 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:40,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:40,540 INFO L82 PathProgramCache]: Analyzing trace with hash 43164722, now seen corresponding path program 2 times [2021-07-09 16:18:40,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:40,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383707744] [2021-07-09 16:18:40,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:40,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:40,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383707744] [2021-07-09 16:18:40,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383707744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:40,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719881024] [2021-07-09 16:18:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:40,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:18:40,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 16:18:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:41,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719881024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:41,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:41,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:18:41,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239194303] [2021-07-09 16:18:41,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:18:41,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:18:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:18:41,013 INFO L87 Difference]: Start difference. First operand 10740 states and 27776 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:41,218 INFO L93 Difference]: Finished difference Result 15875 states and 41000 transitions. [2021-07-09 16:18:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 16:18:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-07-09 16:18:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:41,253 INFO L225 Difference]: With dead ends: 15875 [2021-07-09 16:18:41,254 INFO L226 Difference]: Without dead ends: 15875 [2021-07-09 16:18:41,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:18:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2021-07-09 16:18:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 12000. [2021-07-09 16:18:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12000 states, 11998 states have (on average 2.60251708618103) internal successors, (31225), 11999 states have internal predecessors, (31225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12000 states to 12000 states and 31225 transitions. [2021-07-09 16:18:41,573 INFO L78 Accepts]: Start accepts. Automaton has 12000 states and 31225 transitions. Word has length 157 [2021-07-09 16:18:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:41,574 INFO L482 AbstractCegarLoop]: Abstraction has 12000 states and 31225 transitions. [2021-07-09 16:18:41,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 10 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12000 states and 31225 transitions. [2021-07-09 16:18:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-07-09 16:18:41,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:41,600 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:41,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:41,826 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1830396245, now seen corresponding path program 4 times [2021-07-09 16:18:41,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:41,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657812558] [2021-07-09 16:18:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657812558] [2021-07-09 16:18:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657812558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631328037] [2021-07-09 16:18:41,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:42,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:18:42,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:18:42,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:42,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631328037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:42,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:18:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561660717] [2021-07-09 16:18:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:18:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:18:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:18:42,560 INFO L87 Difference]: Start difference. First operand 12000 states and 31225 transitions. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:42,794 INFO L93 Difference]: Finished difference Result 17199 states and 44580 transitions. [2021-07-09 16:18:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:18:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-07-09 16:18:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:42,832 INFO L225 Difference]: With dead ends: 17199 [2021-07-09 16:18:42,833 INFO L226 Difference]: Without dead ends: 17199 [2021-07-09 16:18:42,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:18:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2021-07-09 16:18:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 13802. [2021-07-09 16:18:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:18:43,161 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 190 [2021-07-09 16:18:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:43,161 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:18:43,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:18:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-09 16:18:43,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:43,182 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:43,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:43,403 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 704345301, now seen corresponding path program 3 times [2021-07-09 16:18:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:43,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447393476] [2021-07-09 16:18:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:18:43,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447393476] [2021-07-09 16:18:43,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447393476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622578453] [2021-07-09 16:18:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:18:43,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:18:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:18:43,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622578453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:43,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:43,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-09 16:18:43,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242089415] [2021-07-09 16:18:43,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:18:43,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:18:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:18:43,977 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:44,225 INFO L93 Difference]: Finished difference Result 17787 states and 46053 transitions. [2021-07-09 16:18:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 16:18:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-07-09 16:18:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:44,262 INFO L225 Difference]: With dead ends: 17787 [2021-07-09 16:18:44,262 INFO L226 Difference]: Without dead ends: 17787 [2021-07-09 16:18:44,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:18:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-07-09 16:18:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 13802. [2021-07-09 16:18:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:18:44,589 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-09 16:18:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:44,589 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:18:44,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:18:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-07-09 16:18:44,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:44,610 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:44,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 16:18:44,835 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash 249164177, now seen corresponding path program 4 times [2021-07-09 16:18:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:44,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617763335] [2021-07-09 16:18:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:44,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:44,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617763335] [2021-07-09 16:18:44,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617763335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:44,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937944522] [2021-07-09 16:18:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:45,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:18:45,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:18:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:45,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937944522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:45,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:45,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:18:45,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033672416] [2021-07-09 16:18:45,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:18:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:18:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:18:45,450 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:45,700 INFO L93 Difference]: Finished difference Result 19137 states and 49609 transitions. [2021-07-09 16:18:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:18:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-07-09 16:18:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:45,744 INFO L225 Difference]: With dead ends: 19137 [2021-07-09 16:18:45,744 INFO L226 Difference]: Without dead ends: 19137 [2021-07-09 16:18:45,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:18:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19137 states. [2021-07-09 16:18:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19137 to 13802. [2021-07-09 16:18:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13800 states have (on average 2.5967391304347824) internal successors, (35835), 13801 states have internal predecessors, (35835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 35835 transitions. [2021-07-09 16:18:46,020 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 35835 transitions. Word has length 191 [2021-07-09 16:18:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:46,020 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 35835 transitions. [2021-07-09 16:18:46,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 35835 transitions. [2021-07-09 16:18:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-07-09 16:18:46,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:46,038 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:46,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 16:18:46,240 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1316096157, now seen corresponding path program 1 times [2021-07-09 16:18:46,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:46,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282645046] [2021-07-09 16:18:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 148 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-09 16:18:46,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282645046] [2021-07-09 16:18:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282645046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669224240] [2021-07-09 16:18:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:18:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:18:46,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669224240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:46,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:46,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-09 16:18:46,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132023343] [2021-07-09 16:18:46,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 16:18:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 16:18:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 16:18:46,853 INFO L87 Difference]: Start difference. First operand 13802 states and 35835 transitions. Second operand has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:47,099 INFO L93 Difference]: Finished difference Result 24997 states and 64918 transitions. [2021-07-09 16:18:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 16:18:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-07-09 16:18:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:47,144 INFO L225 Difference]: With dead ends: 24997 [2021-07-09 16:18:47,144 INFO L226 Difference]: Without dead ends: 24997 [2021-07-09 16:18:47,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:18:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24997 states. [2021-07-09 16:18:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24997 to 14962. [2021-07-09 16:18:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14960 states have (on average 2.606216577540107) internal successors, (38989), 14961 states have internal predecessors, (38989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 38989 transitions. [2021-07-09 16:18:47,520 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 38989 transitions. Word has length 220 [2021-07-09 16:18:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:47,521 INFO L482 AbstractCegarLoop]: Abstraction has 14962 states and 38989 transitions. [2021-07-09 16:18:47,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 38989 transitions. [2021-07-09 16:18:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-07-09 16:18:47,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:47,549 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:47,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:47,756 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1317035050, now seen corresponding path program 5 times [2021-07-09 16:18:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:47,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987637415] [2021-07-09 16:18:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:47,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987637415] [2021-07-09 16:18:47,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987637415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562334400] [2021-07-09 16:18:47,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:48,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 16:18:48,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:18:48,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:48,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562334400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:48,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:48,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:18:48,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227592918] [2021-07-09 16:18:48,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:18:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:18:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:18:48,400 INFO L87 Difference]: Start difference. First operand 14962 states and 38989 transitions. Second operand has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:48,681 INFO L93 Difference]: Finished difference Result 20871 states and 54084 transitions. [2021-07-09 16:18:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:18:48,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-07-09 16:18:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:48,716 INFO L225 Difference]: With dead ends: 20871 [2021-07-09 16:18:48,716 INFO L226 Difference]: Without dead ends: 20871 [2021-07-09 16:18:48,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:18:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-07-09 16:18:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 16764. [2021-07-09 16:18:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 16762 states have (on average 2.6010619257845127) internal successors, (43599), 16763 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 43599 transitions. [2021-07-09 16:18:49,055 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 43599 transitions. Word has length 224 [2021-07-09 16:18:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:49,055 INFO L482 AbstractCegarLoop]: Abstraction has 16764 states and 43599 transitions. [2021-07-09 16:18:49,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.066666666666666) internal successors, (271), 15 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 43599 transitions. [2021-07-09 16:18:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:18:49,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:49,083 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:49,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:49,307 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:49,308 INFO L82 PathProgramCache]: Analyzing trace with hash 143431510, now seen corresponding path program 5 times [2021-07-09 16:18:49,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:49,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069075990] [2021-07-09 16:18:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:18:49,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069075990] [2021-07-09 16:18:49,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069075990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329803755] [2021-07-09 16:18:49,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:49,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:18:49,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:49,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:18:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:18:49,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329803755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:49,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:49,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-09 16:18:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949493765] [2021-07-09 16:18:49,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:18:49,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:49,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:18:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:18:49,866 INFO L87 Difference]: Start difference. First operand 16764 states and 43599 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:50,208 INFO L93 Difference]: Finished difference Result 23844 states and 61943 transitions. [2021-07-09 16:18:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:18:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-09 16:18:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:50,256 INFO L225 Difference]: With dead ends: 23844 [2021-07-09 16:18:50,256 INFO L226 Difference]: Without dead ends: 23844 [2021-07-09 16:18:50,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:18:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23844 states. [2021-07-09 16:18:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23844 to 18704. [2021-07-09 16:18:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18702 states have (on average 2.6167254839054648) internal successors, (48938), 18703 states have internal predecessors, (48938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 48938 transitions. [2021-07-09 16:18:50,626 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 48938 transitions. Word has length 225 [2021-07-09 16:18:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:50,627 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 48938 transitions. [2021-07-09 16:18:50,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 48938 transitions. [2021-07-09 16:18:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:18:50,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:50,657 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:50,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 16:18:50,857 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:50,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1063343500, now seen corresponding path program 6 times [2021-07-09 16:18:50,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:50,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000310645] [2021-07-09 16:18:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:18:50,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:50,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000310645] [2021-07-09 16:18:50,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000310645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:50,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231522604] [2021-07-09 16:18:50,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:51,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:18:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:18:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:18:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231522604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:18:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191665048] [2021-07-09 16:18:51,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:18:51,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:18:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:18:51,475 INFO L87 Difference]: Start difference. First operand 18704 states and 48938 transitions. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:51,774 INFO L93 Difference]: Finished difference Result 30389 states and 79003 transitions. [2021-07-09 16:18:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 16:18:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-09 16:18:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:51,832 INFO L225 Difference]: With dead ends: 30389 [2021-07-09 16:18:51,832 INFO L226 Difference]: Without dead ends: 30389 [2021-07-09 16:18:51,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:18:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30389 states. [2021-07-09 16:18:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30389 to 19964. [2021-07-09 16:18:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:18:52,260 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-09 16:18:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:52,261 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:18:52,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:18:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-07-09 16:18:52,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:52,286 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:52,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 16:18:52,487 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:52,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1518524624, now seen corresponding path program 7 times [2021-07-09 16:18:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:52,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13049363] [2021-07-09 16:18:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:52,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:52,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13049363] [2021-07-09 16:18:52,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13049363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:52,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923043023] [2021-07-09 16:18:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:18:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 12 proven. 250 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:18:52,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923043023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:52,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:52,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:18:52,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650295917] [2021-07-09 16:18:52,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:18:52,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:18:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:18:52,960 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:53,441 INFO L93 Difference]: Finished difference Result 29709 states and 77502 transitions. [2021-07-09 16:18:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:18:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-07-09 16:18:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:53,519 INFO L225 Difference]: With dead ends: 29709 [2021-07-09 16:18:53,519 INFO L226 Difference]: Without dead ends: 29709 [2021-07-09 16:18:53,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:18:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2021-07-09 16:18:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 19964. [2021-07-09 16:18:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:18:53,904 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 225 [2021-07-09 16:18:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:53,904 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:18:53,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:18:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-09 16:18:53,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:53,931 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:54,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 16:18:54,133 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1023520124, now seen corresponding path program 2 times [2021-07-09 16:18:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663518663] [2021-07-09 16:18:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 265 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-07-09 16:18:54,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:54,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663518663] [2021-07-09 16:18:54,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663518663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:54,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834438747] [2021-07-09 16:18:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:54,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:18:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:18:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:18:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834438747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:54,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:54,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 16:18:54,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251412314] [2021-07-09 16:18:54,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:18:54,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:54,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:18:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:18:54,933 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:55,246 INFO L93 Difference]: Finished difference Result 33419 states and 87480 transitions. [2021-07-09 16:18:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:18:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-07-09 16:18:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:55,317 INFO L225 Difference]: With dead ends: 33419 [2021-07-09 16:18:55,317 INFO L226 Difference]: Without dead ends: 33419 [2021-07-09 16:18:55,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:18:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-07-09 16:18:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 19964. [2021-07-09 16:18:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19964 states, 19962 states have (on average 2.624336238853822) internal successors, (52387), 19963 states have internal predecessors, (52387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19964 states to 19964 states and 52387 transitions. [2021-07-09 16:18:55,783 INFO L78 Accepts]: Start accepts. Automaton has 19964 states and 52387 transitions. Word has length 254 [2021-07-09 16:18:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:55,783 INFO L482 AbstractCegarLoop]: Abstraction has 19964 states and 52387 transitions. [2021-07-09 16:18:55,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19964 states and 52387 transitions. [2021-07-09 16:18:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-07-09 16:18:55,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:55,809 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:56,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:56,009 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash -378172578, now seen corresponding path program 3 times [2021-07-09 16:18:56,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:56,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948571481] [2021-07-09 16:18:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 242 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-07-09 16:18:56,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948571481] [2021-07-09 16:18:56,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948571481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755168600] [2021-07-09 16:18:56,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:56,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 16:18:56,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 16:18:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-09 16:18:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755168600] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:18:56,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 16:18:56,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-07-09 16:18:56,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146320969] [2021-07-09 16:18:56,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:18:56,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:18:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:18:56,527 INFO L87 Difference]: Start difference. First operand 19964 states and 52387 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:56,769 INFO L93 Difference]: Finished difference Result 26914 states and 70438 transitions. [2021-07-09 16:18:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 16:18:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-07-09 16:18:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:56,813 INFO L225 Difference]: With dead ends: 26914 [2021-07-09 16:18:56,813 INFO L226 Difference]: Without dead ends: 26914 [2021-07-09 16:18:56,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:18:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-07-09 16:18:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 20644. [2021-07-09 16:18:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20644 states, 20642 states have (on average 2.627700804185641) internal successors, (54241), 20643 states have internal predecessors, (54241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20644 states to 20644 states and 54241 transitions. [2021-07-09 16:18:57,348 INFO L78 Accepts]: Start accepts. Automaton has 20644 states and 54241 transitions. Word has length 254 [2021-07-09 16:18:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:57,349 INFO L482 AbstractCegarLoop]: Abstraction has 20644 states and 54241 transitions. [2021-07-09 16:18:57,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 20644 states and 54241 transitions. [2021-07-09 16:18:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-07-09 16:18:57,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:57,375 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:57,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 16:18:57,576 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash -518142441, now seen corresponding path program 6 times [2021-07-09 16:18:57,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:57,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786903006] [2021-07-09 16:18:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:57,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786903006] [2021-07-09 16:18:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786903006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749748489] [2021-07-09 16:18:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:58,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:18:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:18:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:18:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:18:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749748489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:18:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:18:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039053615] [2021-07-09 16:18:58,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:18:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:18:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:18:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:18:58,424 INFO L87 Difference]: Start difference. First operand 20644 states and 54241 transitions. Second operand has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:18:58,814 INFO L93 Difference]: Finished difference Result 27943 states and 72966 transitions. [2021-07-09 16:18:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:18:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-07-09 16:18:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:18:58,867 INFO L225 Difference]: With dead ends: 27943 [2021-07-09 16:18:58,867 INFO L226 Difference]: Without dead ends: 27943 [2021-07-09 16:18:58,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:18:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27943 states. [2021-07-09 16:18:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27943 to 22446. [2021-07-09 16:18:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22446 states, 22444 states have (on average 2.62212618071645) internal successors, (58851), 22445 states have internal predecessors, (58851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22446 states to 22446 states and 58851 transitions. [2021-07-09 16:18:59,398 INFO L78 Accepts]: Start accepts. Automaton has 22446 states and 58851 transitions. Word has length 258 [2021-07-09 16:18:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:18:59,399 INFO L482 AbstractCegarLoop]: Abstraction has 22446 states and 58851 transitions. [2021-07-09 16:18:59,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 17.941176470588236) internal successors, (305), 17 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:18:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 22446 states and 58851 transitions. [2021-07-09 16:18:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:18:59,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:18:59,426 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:18:59,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:59,627 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:18:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:18:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1618093673, now seen corresponding path program 8 times [2021-07-09 16:18:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:18:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010568620] [2021-07-09 16:18:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:18:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:18:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 404 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:18:59,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:18:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010568620] [2021-07-09 16:18:59,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010568620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:18:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723048872] [2021-07-09 16:18:59,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:18:59,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:18:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:18:59,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:18:59,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:00,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723048872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:00,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 16:19:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762269835] [2021-07-09 16:19:00,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:00,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:00,328 INFO L87 Difference]: Start difference. First operand 22446 states and 58851 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:00,584 INFO L93 Difference]: Finished difference Result 29176 states and 76036 transitions. [2021-07-09 16:19:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:19:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-09 16:19:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:00,637 INFO L225 Difference]: With dead ends: 29176 [2021-07-09 16:19:00,637 INFO L226 Difference]: Without dead ends: 29176 [2021-07-09 16:19:00,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:19:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2021-07-09 16:19:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 23126. [2021-07-09 16:19:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23126 states, 23124 states have (on average 2.626751427088739) internal successors, (60741), 23125 states have internal predecessors, (60741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 60741 transitions. [2021-07-09 16:19:01,160 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 60741 transitions. Word has length 259 [2021-07-09 16:19:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:01,161 INFO L482 AbstractCegarLoop]: Abstraction has 23126 states and 60741 transitions. [2021-07-09 16:19:01,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 60741 transitions. [2021-07-09 16:19:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:19:01,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:01,195 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:01,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:01,395 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -155081419, now seen corresponding path program 9 times [2021-07-09 16:19:01,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:01,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115634838] [2021-07-09 16:19:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:01,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:01,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115634838] [2021-07-09 16:19:01,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115634838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:01,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329206346] [2021-07-09 16:19:01,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 16:19:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329206346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:02,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:02,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:19:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991235780] [2021-07-09 16:19:02,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:02,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:02,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:02,240 INFO L87 Difference]: Start difference. First operand 23126 states and 60741 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:02,625 INFO L93 Difference]: Finished difference Result 34101 states and 89002 transitions. [2021-07-09 16:19:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:19:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-09 16:19:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:02,686 INFO L225 Difference]: With dead ends: 34101 [2021-07-09 16:19:02,686 INFO L226 Difference]: Without dead ends: 34101 [2021-07-09 16:19:02,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2021-07-09 16:19:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-07-09 16:19:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 25066. [2021-07-09 16:19:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25066 states, 25064 states have (on average 2.6364506862432173) internal successors, (66080), 25065 states have internal predecessors, (66080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25066 states to 25066 states and 66080 transitions. [2021-07-09 16:19:03,177 INFO L78 Accepts]: Start accepts. Automaton has 25066 states and 66080 transitions. Word has length 259 [2021-07-09 16:19:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:03,177 INFO L482 AbstractCegarLoop]: Abstraction has 25066 states and 66080 transitions. [2021-07-09 16:19:03,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 25066 states and 66080 transitions. [2021-07-09 16:19:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-07-09 16:19:03,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:03,218 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:03,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 16:19:03,421 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1361856429, now seen corresponding path program 10 times [2021-07-09 16:19:03,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:03,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988222629] [2021-07-09 16:19:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:03,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:03,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988222629] [2021-07-09 16:19:03,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988222629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:03,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613936618] [2021-07-09 16:19:03,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:04,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:19:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 15 proven. 381 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613936618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:04,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:04,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 16:19:04,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510340514] [2021-07-09 16:19:04,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:04,361 INFO L87 Difference]: Start difference. First operand 25066 states and 66080 transitions. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:04,746 INFO L93 Difference]: Finished difference Result 34341 states and 90071 transitions. [2021-07-09 16:19:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:19:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-07-09 16:19:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:04,809 INFO L225 Difference]: With dead ends: 34341 [2021-07-09 16:19:04,809 INFO L226 Difference]: Without dead ends: 34341 [2021-07-09 16:19:04,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:19:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34341 states. [2021-07-09 16:19:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34341 to 26326. [2021-07-09 16:19:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26324 states have (on average 2.641277921288558) internal successors, (69529), 26325 states have internal predecessors, (69529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 69529 transitions. [2021-07-09 16:19:05,326 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 69529 transitions. Word has length 259 [2021-07-09 16:19:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:05,327 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 69529 transitions. [2021-07-09 16:19:05,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 69529 transitions. [2021-07-09 16:19:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-07-09 16:19:05,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:05,369 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:05,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:05,579 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1010690922, now seen corresponding path program 4 times [2021-07-09 16:19:05,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:05,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582581520] [2021-07-09 16:19:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:05,792 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 16:19:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-09 16:19:05,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582581520] [2021-07-09 16:19:05,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582581520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:05,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315556982] [2021-07-09 16:19:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:06,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:06,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 53 proven. 217 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-07-09 16:19:06,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315556982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:06,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:06,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:19:06,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771487476] [2021-07-09 16:19:06,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:19:06,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:19:06,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:06,479 INFO L87 Difference]: Start difference. First operand 26326 states and 69529 transitions. Second operand has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:06,862 INFO L93 Difference]: Finished difference Result 41691 states and 109020 transitions. [2021-07-09 16:19:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:19:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 283 [2021-07-09 16:19:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:06,957 INFO L225 Difference]: With dead ends: 41691 [2021-07-09 16:19:06,957 INFO L226 Difference]: Without dead ends: 41691 [2021-07-09 16:19:06,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:19:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41691 states. [2021-07-09 16:19:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41691 to 29426. [2021-07-09 16:19:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29424 states have (on average 2.6516449157150626) internal successors, (78022), 29425 states have internal predecessors, (78022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 78022 transitions. [2021-07-09 16:19:07,630 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 78022 transitions. Word has length 283 [2021-07-09 16:19:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:07,630 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 78022 transitions. [2021-07-09 16:19:07,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.615384615384617) internal successors, (268), 13 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 78022 transitions. [2021-07-09 16:19:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-09 16:19:07,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:07,797 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:07,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 16:19:07,997 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1176701279, now seen corresponding path program 5 times [2021-07-09 16:19:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:07,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99386072] [2021-07-09 16:19:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 396 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:19:08,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99386072] [2021-07-09 16:19:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99386072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455814079] [2021-07-09 16:19:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:08,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 16:19:08,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 15 proven. 373 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:08,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455814079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:08,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:08,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-09 16:19:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616101383] [2021-07-09 16:19:08,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:19:08,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:19:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:19:08,630 INFO L87 Difference]: Start difference. First operand 29426 states and 78022 transitions. Second operand has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:09,022 INFO L93 Difference]: Finished difference Result 39436 states and 103060 transitions. [2021-07-09 16:19:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 16:19:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-07-09 16:19:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:09,093 INFO L225 Difference]: With dead ends: 39436 [2021-07-09 16:19:09,094 INFO L226 Difference]: Without dead ends: 39436 [2021-07-09 16:19:09,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:19:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39436 states. [2021-07-09 16:19:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39436 to 27486. [2021-07-09 16:19:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27486 states, 27484 states have (on average 2.6445568330665115) internal successors, (72683), 27485 states have internal predecessors, (72683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27486 states to 27486 states and 72683 transitions. [2021-07-09 16:19:09,702 INFO L78 Accepts]: Start accepts. Automaton has 27486 states and 72683 transitions. Word has length 288 [2021-07-09 16:19:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:09,702 INFO L482 AbstractCegarLoop]: Abstraction has 27486 states and 72683 transitions. [2021-07-09 16:19:09,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 27486 states and 72683 transitions. [2021-07-09 16:19:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-07-09 16:19:09,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:09,882 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:10,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 16:19:10,082 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash 129283205, now seen corresponding path program 6 times [2021-07-09 16:19:10,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:10,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396350786] [2021-07-09 16:19:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 54 proven. 388 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 16:19:10,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:10,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396350786] [2021-07-09 16:19:10,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396350786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:10,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844438790] [2021-07-09 16:19:10,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:10,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:19:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 16:19:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 250 proven. 59 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-07-09 16:19:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844438790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:10,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:10,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-07-09 16:19:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431642921] [2021-07-09 16:19:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:19:10,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:10,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:19:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:19:10,897 INFO L87 Difference]: Start difference. First operand 27486 states and 72683 transitions. Second operand has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:11,666 INFO L93 Difference]: Finished difference Result 56766 states and 149064 transitions. [2021-07-09 16:19:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:19:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-07-09 16:19:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:11,790 INFO L225 Difference]: With dead ends: 56766 [2021-07-09 16:19:11,790 INFO L226 Difference]: Without dead ends: 56766 [2021-07-09 16:19:11,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=623, Invalid=2029, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 16:19:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56766 states. [2021-07-09 16:19:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56766 to 30626. [2021-07-09 16:19:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30626 states, 30624 states have (on average 2.658894984326019) internal successors, (81426), 30625 states have internal predecessors, (81426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30626 states to 30626 states and 81426 transitions. [2021-07-09 16:19:12,677 INFO L78 Accepts]: Start accepts. Automaton has 30626 states and 81426 transitions. Word has length 288 [2021-07-09 16:19:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:12,677 INFO L482 AbstractCegarLoop]: Abstraction has 30626 states and 81426 transitions. [2021-07-09 16:19:12,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 21.136363636363637) internal successors, (465), 22 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30626 states and 81426 transitions. [2021-07-09 16:19:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-07-09 16:19:12,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:12,727 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:12,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:12,928 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1883498472, now seen corresponding path program 7 times [2021-07-09 16:19:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:12,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484172585] [2021-07-09 16:19:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:13,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:13,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484172585] [2021-07-09 16:19:13,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484172585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:13,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218022110] [2021-07-09 16:19:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:13,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218022110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:13,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:13,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:19:13,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797467760] [2021-07-09 16:19:13,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:19:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:19:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:19:13,683 INFO L87 Difference]: Start difference. First operand 30626 states and 81426 transitions. Second operand has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:14,171 INFO L93 Difference]: Finished difference Result 39095 states and 103168 transitions. [2021-07-09 16:19:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:19:14,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-07-09 16:19:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:14,242 INFO L225 Difference]: With dead ends: 39095 [2021-07-09 16:19:14,242 INFO L226 Difference]: Without dead ends: 39095 [2021-07-09 16:19:14,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:19:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39095 states. [2021-07-09 16:19:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 33108. [2021-07-09 16:19:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-09 16:19:14,851 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 292 [2021-07-09 16:19:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:14,851 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-09 16:19:14,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 17.842105263157894) internal successors, (339), 19 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-09 16:19:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:19:14,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:14,893 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:15,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 16:19:15,108 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 885476248, now seen corresponding path program 11 times [2021-07-09 16:19:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:15,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787080513] [2021-07-09 16:19:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 589 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:19:15,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:15,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787080513] [2021-07-09 16:19:15,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787080513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:15,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239447086] [2021-07-09 16:19:15,398 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 16:19:15,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:19:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:15,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239447086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:15,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:15,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:19:15,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723889805] [2021-07-09 16:19:15,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:15,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:15,912 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:16,394 INFO L93 Difference]: Finished difference Result 41038 states and 107978 transitions. [2021-07-09 16:19:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-09 16:19:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:16,474 INFO L225 Difference]: With dead ends: 41038 [2021-07-09 16:19:16,474 INFO L226 Difference]: Without dead ends: 41038 [2021-07-09 16:19:16,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:19:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41038 states. [2021-07-09 16:19:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41038 to 33108. [2021-07-09 16:19:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33108 states, 33106 states have (on average 2.6558931915664834) internal successors, (87926), 33107 states have internal predecessors, (87926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33108 states to 33108 states and 87926 transitions. [2021-07-09 16:19:17,101 INFO L78 Accepts]: Start accepts. Automaton has 33108 states and 87926 transitions. Word has length 293 [2021-07-09 16:19:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:17,101 INFO L482 AbstractCegarLoop]: Abstraction has 33108 states and 87926 transitions. [2021-07-09 16:19:17,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33108 states and 87926 transitions. [2021-07-09 16:19:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:19:17,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:17,146 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:17,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:17,347 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1494134710, now seen corresponding path program 12 times [2021-07-09 16:19:17,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:17,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112667915] [2021-07-09 16:19:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:17,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112667915] [2021-07-09 16:19:17,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112667915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:17,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452799818] [2021-07-09 16:19:17,484 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 16:19:17,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:19:17,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:17,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:18,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452799818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:18,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:18,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011959181] [2021-07-09 16:19:18,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:18,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:18,284 INFO L87 Difference]: Start difference. First operand 33108 states and 87926 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:18,685 INFO L93 Difference]: Finished difference Result 46473 states and 122134 transitions. [2021-07-09 16:19:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-09 16:19:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:18,931 INFO L225 Difference]: With dead ends: 46473 [2021-07-09 16:19:18,932 INFO L226 Difference]: Without dead ends: 46473 [2021-07-09 16:19:18,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:19:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46473 states. [2021-07-09 16:19:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46473 to 34368. [2021-07-09 16:19:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34368 states, 34366 states have (on average 2.6588779607751847) internal successors, (91375), 34367 states have internal predecessors, (91375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34368 states to 34368 states and 91375 transitions. [2021-07-09 16:19:19,682 INFO L78 Accepts]: Start accepts. Automaton has 34368 states and 91375 transitions. Word has length 293 [2021-07-09 16:19:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:19,682 INFO L482 AbstractCegarLoop]: Abstraction has 34368 states and 91375 transitions. [2021-07-09 16:19:19,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 34368 states and 91375 transitions. [2021-07-09 16:19:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-07-09 16:19:19,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:19,728 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:19,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 16:19:19,929 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1337820332, now seen corresponding path program 13 times [2021-07-09 16:19:19,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:19,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374436093] [2021-07-09 16:19:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:20,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374436093] [2021-07-09 16:19:20,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374436093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:20,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296456640] [2021-07-09 16:19:20,072 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 16:19:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:19:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 18 proven. 566 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296456640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:20,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:20,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:19:20,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479565171] [2021-07-09 16:19:20,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:19:20,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:19:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:19:20,651 INFO L87 Difference]: Start difference. First operand 34368 states and 91375 transitions. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:21,024 INFO L93 Difference]: Finished difference Result 46513 states and 122653 transitions. [2021-07-09 16:19:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:19:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-07-09 16:19:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:21,124 INFO L225 Difference]: With dead ends: 46513 [2021-07-09 16:19:21,124 INFO L226 Difference]: Without dead ends: 46513 [2021-07-09 16:19:21,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-07-09 16:19:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-07-09 16:19:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 36308. [2021-07-09 16:19:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-09 16:19:21,984 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 293 [2021-07-09 16:19:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:21,984 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-09 16:19:21,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-09 16:19:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:19:22,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:22,044 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:22,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 16:19:22,246 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash -395080804, now seen corresponding path program 7 times [2021-07-09 16:19:22,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:22,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631563391] [2021-07-09 16:19:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:19:22,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631563391] [2021-07-09 16:19:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631563391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242193205] [2021-07-09 16:19:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:22,931 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:23,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242193205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:23,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:23,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:19:23,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496160492] [2021-07-09 16:19:23,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:23,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:23,095 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:23,496 INFO L93 Difference]: Finished difference Result 55238 states and 146081 transitions. [2021-07-09 16:19:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 16:19:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-07-09 16:19:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:23,608 INFO L225 Difference]: With dead ends: 55238 [2021-07-09 16:19:23,608 INFO L226 Difference]: Without dead ends: 55238 [2021-07-09 16:19:23,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:19:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55238 states. [2021-07-09 16:19:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55238 to 36988. [2021-07-09 16:19:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36986 states have (on average 2.665981722814038) internal successors, (98604), 36987 states have internal predecessors, (98604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 98604 transitions. [2021-07-09 16:19:24,565 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 98604 transitions. Word has length 322 [2021-07-09 16:19:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:24,565 INFO L482 AbstractCegarLoop]: Abstraction has 36988 states and 98604 transitions. [2021-07-09 16:19:24,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 98604 transitions. [2021-07-09 16:19:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:19:24,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:24,613 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:24,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:24,822 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -752046402, now seen corresponding path program 8 times [2021-07-09 16:19:24,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:24,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469665367] [2021-07-09 16:19:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:19:24,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:24,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469665367] [2021-07-09 16:19:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469665367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:24,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601385445] [2021-07-09 16:19:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:25,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:25,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:25,408 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:25,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601385445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:25,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:25,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:19:25,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125687829] [2021-07-09 16:19:25,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:25,641 INFO L87 Difference]: Start difference. First operand 36988 states and 98604 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:26,049 INFO L93 Difference]: Finished difference Result 54758 states and 144400 transitions. [2021-07-09 16:19:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:19:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-07-09 16:19:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:26,179 INFO L225 Difference]: With dead ends: 54758 [2021-07-09 16:19:26,180 INFO L226 Difference]: Without dead ends: 54758 [2021-07-09 16:19:26,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54758 states. [2021-07-09 16:19:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54758 to 38248. [2021-07-09 16:19:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38248 states, 38246 states have (on average 2.6683313287664068) internal successors, (102053), 38247 states have internal predecessors, (102053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38248 states to 38248 states and 102053 transitions. [2021-07-09 16:19:27,157 INFO L78 Accepts]: Start accepts. Automaton has 38248 states and 102053 transitions. Word has length 322 [2021-07-09 16:19:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:27,158 INFO L482 AbstractCegarLoop]: Abstraction has 38248 states and 102053 transitions. [2021-07-09 16:19:27,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 38248 states and 102053 transitions. [2021-07-09 16:19:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:19:27,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:27,211 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:27,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:27,413 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash 447121760, now seen corresponding path program 9 times [2021-07-09 16:19:27,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:27,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926580254] [2021-07-09 16:19:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 581 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:19:27,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:27,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926580254] [2021-07-09 16:19:27,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926580254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:27,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493929021] [2021-07-09 16:19:27,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:27,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 16:19:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:28,083 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:19:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:28,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493929021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:28,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:28,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-09 16:19:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926266825] [2021-07-09 16:19:28,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:28,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:28,245 INFO L87 Difference]: Start difference. First operand 38248 states and 102053 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:28,629 INFO L93 Difference]: Finished difference Result 53093 states and 139653 transitions. [2021-07-09 16:19:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:19:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-07-09 16:19:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:28,739 INFO L225 Difference]: With dead ends: 53093 [2021-07-09 16:19:28,739 INFO L226 Difference]: Without dead ends: 53093 [2021-07-09 16:19:28,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53093 states. [2021-07-09 16:19:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53093 to 36308. [2021-07-09 16:19:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36308 states, 36306 states have (on average 2.6638572136836887) internal successors, (96714), 36307 states have internal predecessors, (96714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36308 states to 36308 states and 96714 transitions. [2021-07-09 16:19:29,764 INFO L78 Accepts]: Start accepts. Automaton has 36308 states and 96714 transitions. Word has length 322 [2021-07-09 16:19:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:29,764 INFO L482 AbstractCegarLoop]: Abstraction has 36308 states and 96714 transitions. [2021-07-09 16:19:29,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36308 states and 96714 transitions. [2021-07-09 16:19:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:19:29,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:29,823 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:30,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 16:19:30,023 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:30,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2118752382, now seen corresponding path program 10 times [2021-07-09 16:19:30,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:30,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511614268] [2021-07-09 16:19:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:30,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511614268] [2021-07-09 16:19:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511614268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393487859] [2021-07-09 16:19:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:30,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:30,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393487859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:30,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:30,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:30,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701355224] [2021-07-09 16:19:30,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:30,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:30,763 INFO L87 Difference]: Start difference. First operand 36308 states and 96714 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:31,296 INFO L93 Difference]: Finished difference Result 59558 states and 157552 transitions. [2021-07-09 16:19:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:19:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-07-09 16:19:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:31,427 INFO L225 Difference]: With dead ends: 59558 [2021-07-09 16:19:31,427 INFO L226 Difference]: Without dead ends: 59558 [2021-07-09 16:19:31,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59558 states. [2021-07-09 16:19:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59558 to 38928. [2021-07-09 16:19:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38928 states, 38926 states have (on average 2.670271797770128) internal successors, (103943), 38927 states have internal predecessors, (103943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38928 states to 38928 states and 103943 transitions. [2021-07-09 16:19:32,555 INFO L78 Accepts]: Start accepts. Automaton has 38928 states and 103943 transitions. Word has length 322 [2021-07-09 16:19:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:32,555 INFO L482 AbstractCegarLoop]: Abstraction has 38928 states and 103943 transitions. [2021-07-09 16:19:32,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38928 states and 103943 transitions. [2021-07-09 16:19:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-07-09 16:19:32,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:32,623 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:32,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:32,827 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1761786784, now seen corresponding path program 11 times [2021-07-09 16:19:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:32,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065385776] [2021-07-09 16:19:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:32,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:32,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065385776] [2021-07-09 16:19:32,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065385776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:32,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774378024] [2021-07-09 16:19:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:33,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 16:19:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 18 proven. 558 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:19:33,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774378024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:33,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:33,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:19:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677846620] [2021-07-09 16:19:33,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:19:33,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:19:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:19:33,642 INFO L87 Difference]: Start difference. First operand 38928 states and 103943 transitions. Second operand has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:34,146 INFO L93 Difference]: Finished difference Result 57013 states and 150357 transitions. [2021-07-09 16:19:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 16:19:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-07-09 16:19:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:34,264 INFO L225 Difference]: With dead ends: 57013 [2021-07-09 16:19:34,264 INFO L226 Difference]: Without dead ends: 57013 [2021-07-09 16:19:34,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:19:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57013 states. [2021-07-09 16:19:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57013 to 41348. [2021-07-09 16:19:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41348 states, 41346 states have (on average 2.6736806462535676) internal successors, (110546), 41347 states have internal predecessors, (110546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 110546 transitions. [2021-07-09 16:19:35,390 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 110546 transitions. Word has length 322 [2021-07-09 16:19:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:35,390 INFO L482 AbstractCegarLoop]: Abstraction has 41348 states and 110546 transitions. [2021-07-09 16:19:35,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.733333333333334) internal successors, (311), 15 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 110546 transitions. [2021-07-09 16:19:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-07-09 16:19:35,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:35,458 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:35,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 16:19:35,658 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -350311975, now seen corresponding path program 8 times [2021-07-09 16:19:35,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:35,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305769755] [2021-07-09 16:19:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:35,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:35,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305769755] [2021-07-09 16:19:35,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305769755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:35,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697489688] [2021-07-09 16:19:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:35,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:35,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:19:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697489688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:36,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:19:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124351398] [2021-07-09 16:19:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:19:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:19:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:19:36,323 INFO L87 Difference]: Start difference. First operand 41348 states and 110546 transitions. Second operand has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:36,926 INFO L93 Difference]: Finished difference Result 50527 states and 134028 transitions. [2021-07-09 16:19:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:19:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-07-09 16:19:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:37,029 INFO L225 Difference]: With dead ends: 50527 [2021-07-09 16:19:37,029 INFO L226 Difference]: Without dead ends: 50527 [2021-07-09 16:19:37,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:19:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2021-07-09 16:19:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 43150. [2021-07-09 16:19:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-09 16:19:38,106 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 326 [2021-07-09 16:19:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:38,107 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-09 16:19:38,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 17.761904761904763) internal successors, (373), 21 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-09 16:19:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:38,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:38,173 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:38,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 16:19:38,374 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 670891353, now seen corresponding path program 14 times [2021-07-09 16:19:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:38,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697026882] [2021-07-09 16:19:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 808 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:19:38,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697026882] [2021-07-09 16:19:38,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697026882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134323614] [2021-07-09 16:19:38,548 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 16:19:38,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:19:38,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:38,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134323614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:38,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:38,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:19:38,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768772068] [2021-07-09 16:19:38,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:38,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:38,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:38,999 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:39,530 INFO L93 Difference]: Finished difference Result 53420 states and 141238 transitions. [2021-07-09 16:19:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:19:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:39,639 INFO L225 Difference]: With dead ends: 53420 [2021-07-09 16:19:39,639 INFO L226 Difference]: Without dead ends: 53420 [2021-07-09 16:19:39,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:19:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53420 states. [2021-07-09 16:19:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53420 to 43830. [2021-07-09 16:19:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43830 states, 43828 states have (on average 2.6705758875604637) internal successors, (117046), 43829 states have internal predecessors, (117046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43830 states to 43830 states and 117046 transitions. [2021-07-09 16:19:40,595 INFO L78 Accepts]: Start accepts. Automaton has 43830 states and 117046 transitions. Word has length 327 [2021-07-09 16:19:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:40,595 INFO L482 AbstractCegarLoop]: Abstraction has 43830 states and 117046 transitions. [2021-07-09 16:19:40,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 43830 states and 117046 transitions. [2021-07-09 16:19:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:40,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:40,907 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:41,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 16:19:41,131 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 852613623, now seen corresponding path program 15 times [2021-07-09 16:19:41,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:41,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217158129] [2021-07-09 16:19:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:41,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:41,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217158129] [2021-07-09 16:19:41,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217158129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:41,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752899440] [2021-07-09 16:19:41,282 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 16:19:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:19:41,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:41,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752899440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:19:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390771983] [2021-07-09 16:19:41,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:41,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:41,909 INFO L87 Difference]: Start difference. First operand 43830 states and 117046 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:42,461 INFO L93 Difference]: Finished difference Result 57625 states and 151795 transitions. [2021-07-09 16:19:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:19:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:42,576 INFO L225 Difference]: With dead ends: 57625 [2021-07-09 16:19:42,576 INFO L226 Difference]: Without dead ends: 57625 [2021-07-09 16:19:42,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:19:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57625 states. [2021-07-09 16:19:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57625 to 43150. [2021-07-09 16:19:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43150 states, 43148 states have (on average 2.668860665616019) internal successors, (115156), 43149 states have internal predecessors, (115156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43150 states to 43150 states and 115156 transitions. [2021-07-09 16:19:43,501 INFO L78 Accepts]: Start accepts. Automaton has 43150 states and 115156 transitions. Word has length 327 [2021-07-09 16:19:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:43,501 INFO L482 AbstractCegarLoop]: Abstraction has 43150 states and 115156 transitions. [2021-07-09 16:19:43,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 43150 states and 115156 transitions. [2021-07-09 16:19:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:43,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:43,834 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 16:19:44,054 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:44,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1461272085, now seen corresponding path program 16 times [2021-07-09 16:19:44,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:44,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156767269] [2021-07-09 16:19:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:44,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156767269] [2021-07-09 16:19:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156767269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603568573] [2021-07-09 16:19:44,223 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 16:19:44,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:19:44,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603568573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:44,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:44,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:19:44,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636131255] [2021-07-09 16:19:44,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:44,847 INFO L87 Difference]: Start difference. First operand 43150 states and 115156 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:45,418 INFO L93 Difference]: Finished difference Result 58745 states and 155304 transitions. [2021-07-09 16:19:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:19:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:45,554 INFO L225 Difference]: With dead ends: 58745 [2021-07-09 16:19:45,554 INFO L226 Difference]: Without dead ends: 58745 [2021-07-09 16:19:45,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=345, Invalid=845, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:19:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58745 states. [2021-07-09 16:19:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58745 to 45090. [2021-07-09 16:19:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45090 states, 45088 states have (on average 2.672440560681334) internal successors, (120495), 45089 states have internal predecessors, (120495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45090 states to 45090 states and 120495 transitions. [2021-07-09 16:19:46,501 INFO L78 Accepts]: Start accepts. Automaton has 45090 states and 120495 transitions. Word has length 327 [2021-07-09 16:19:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:46,501 INFO L482 AbstractCegarLoop]: Abstraction has 45090 states and 120495 transitions. [2021-07-09 16:19:46,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45090 states and 120495 transitions. [2021-07-09 16:19:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:46,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:46,831 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:47,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 16:19:47,045 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1370682957, now seen corresponding path program 17 times [2021-07-09 16:19:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:47,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859436574] [2021-07-09 16:19:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859436574] [2021-07-09 16:19:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859436574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637975116] [2021-07-09 16:19:47,200 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 16:19:47,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:19:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:47,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637975116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:47,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:47,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:19:47,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851123182] [2021-07-09 16:19:47,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:47,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:47,774 INFO L87 Difference]: Start difference. First operand 45090 states and 120495 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:48,466 INFO L93 Difference]: Finished difference Result 64210 states and 169402 transitions. [2021-07-09 16:19:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:19:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:48,648 INFO L225 Difference]: With dead ends: 64210 [2021-07-09 16:19:48,648 INFO L226 Difference]: Without dead ends: 64210 [2021-07-09 16:19:48,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:19:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2021-07-09 16:19:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 48290. [2021-07-09 16:19:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48290 states, 48288 states have (on average 2.6773318422796555) internal successors, (129283), 48289 states have internal predecessors, (129283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48290 states to 48290 states and 129283 transitions. [2021-07-09 16:19:50,024 INFO L78 Accepts]: Start accepts. Automaton has 48290 states and 129283 transitions. Word has length 327 [2021-07-09 16:19:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 48290 states and 129283 transitions. [2021-07-09 16:19:50,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48290 states and 129283 transitions. [2021-07-09 16:19:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:50,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:50,094 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:50,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 16:19:50,295 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1717509329, now seen corresponding path program 18 times [2021-07-09 16:19:50,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:50,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828604315] [2021-07-09 16:19:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:50,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828604315] [2021-07-09 16:19:50,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828604315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736970710] [2021-07-09 16:19:50,452 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 16:19:50,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:19:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736970710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:51,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:51,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:19:51,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036624870] [2021-07-09 16:19:51,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:51,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:51,188 INFO L87 Difference]: Start difference. First operand 48290 states and 129283 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:51,823 INFO L93 Difference]: Finished difference Result 71055 states and 187712 transitions. [2021-07-09 16:19:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:19:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:51,976 INFO L225 Difference]: With dead ends: 71055 [2021-07-09 16:19:51,976 INFO L226 Difference]: Without dead ends: 71055 [2021-07-09 16:19:51,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:19:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71055 states. [2021-07-09 16:19:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71055 to 49550. [2021-07-09 16:19:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49550 states, 49548 states have (on average 2.678856866069266) internal successors, (132732), 49549 states have internal predecessors, (132732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49550 states to 49550 states and 132732 transitions. [2021-07-09 16:19:53,361 INFO L78 Accepts]: Start accepts. Automaton has 49550 states and 132732 transitions. Word has length 327 [2021-07-09 16:19:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:53,361 INFO L482 AbstractCegarLoop]: Abstraction has 49550 states and 132732 transitions. [2021-07-09 16:19:53,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49550 states and 132732 transitions. [2021-07-09 16:19:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-07-09 16:19:53,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:53,435 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:53,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 16:19:53,636 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1605982063, now seen corresponding path program 19 times [2021-07-09 16:19:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:53,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30019685] [2021-07-09 16:19:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30019685] [2021-07-09 16:19:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30019685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882464517] [2021-07-09 16:19:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 16:19:53,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 21 proven. 785 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:19:54,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882464517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:54,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:54,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:19:54,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879475440] [2021-07-09 16:19:54,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:19:54,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:19:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:19:54,433 INFO L87 Difference]: Start difference. First operand 49550 states and 132732 transitions. Second operand has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:55,083 INFO L93 Difference]: Finished difference Result 66465 states and 176301 transitions. [2021-07-09 16:19:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:19:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-07-09 16:19:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:55,260 INFO L225 Difference]: With dead ends: 66465 [2021-07-09 16:19:55,260 INFO L226 Difference]: Without dead ends: 66465 [2021-07-09 16:19:55,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:19:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66465 states. [2021-07-09 16:19:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66465 to 48190. [2021-07-09 16:19:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48190 states, 48188 states have (on average 2.6760189258736613) internal successors, (128952), 48189 states have internal predecessors, (128952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 128952 transitions. [2021-07-09 16:19:56,422 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 128952 transitions. Word has length 327 [2021-07-09 16:19:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:56,422 INFO L482 AbstractCegarLoop]: Abstraction has 48190 states and 128952 transitions. [2021-07-09 16:19:56,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.444444444444443) internal successors, (350), 18 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 128952 transitions. [2021-07-09 16:19:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-07-09 16:19:56,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:19:56,740 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:19:56,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:56,965 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:19:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:19:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1871299756, now seen corresponding path program 12 times [2021-07-09 16:19:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:19:56,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462809089] [2021-07-09 16:19:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:19:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:19:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 602 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:19:57,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:19:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462809089] [2021-07-09 16:19:57,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462809089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872549331] [2021-07-09 16:19:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:19:57,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 16:19:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:19:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:19:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:19:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 18 proven. 579 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:19:57,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872549331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:19:57,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:19:57,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-09 16:19:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645929334] [2021-07-09 16:19:57,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 16:19:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:19:57,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 16:19:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:19:57,710 INFO L87 Difference]: Start difference. First operand 48190 states and 128952 transitions. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:19:58,338 INFO L93 Difference]: Finished difference Result 84430 states and 223303 transitions. [2021-07-09 16:19:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 16:19:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2021-07-09 16:19:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:19:58,513 INFO L225 Difference]: With dead ends: 84430 [2021-07-09 16:19:58,513 INFO L226 Difference]: Without dead ends: 84430 [2021-07-09 16:19:58,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 16:19:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84430 states. [2021-07-09 16:19:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84430 to 57010. [2021-07-09 16:19:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57010 states, 57008 states have (on average 2.6867632612966603) internal successors, (153167), 57009 states have internal predecessors, (153167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57010 states to 57010 states and 153167 transitions. [2021-07-09 16:19:59,998 INFO L78 Accepts]: Start accepts. Automaton has 57010 states and 153167 transitions. Word has length 351 [2021-07-09 16:19:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:19:59,999 INFO L482 AbstractCegarLoop]: Abstraction has 57010 states and 153167 transitions. [2021-07-09 16:19:59,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:19:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 57010 states and 153167 transitions. [2021-07-09 16:20:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:00,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:00,095 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:00,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:00,296 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:00,296 INFO L82 PathProgramCache]: Analyzing trace with hash -784131781, now seen corresponding path program 13 times [2021-07-09 16:20:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:00,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261657963] [2021-07-09 16:20:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:00,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261657963] [2021-07-09 16:20:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261657963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224542389] [2021-07-09 16:20:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:01,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224542389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:01,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:01,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:20:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026393991] [2021-07-09 16:20:01,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:01,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:01,213 INFO L87 Difference]: Start difference. First operand 57010 states and 153167 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:01,951 INFO L93 Difference]: Finished difference Result 84875 states and 226287 transitions. [2021-07-09 16:20:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:20:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:02,153 INFO L225 Difference]: With dead ends: 84875 [2021-07-09 16:20:02,154 INFO L226 Difference]: Without dead ends: 84875 [2021-07-09 16:20:02,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:20:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84875 states. [2021-07-09 16:20:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84875 to 58370. [2021-07-09 16:20:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-09 16:20:03,772 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-09 16:20:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:03,773 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-09 16:20:03,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-09 16:20:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:03,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:03,886 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:04,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:04,087 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1141097379, now seen corresponding path program 14 times [2021-07-09 16:20:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460790850] [2021-07-09 16:20:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:04,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:04,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460790850] [2021-07-09 16:20:04,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460790850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:04,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429451900] [2021-07-09 16:20:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:04,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:04,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429451900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:04,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:04,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:20:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570514283] [2021-07-09 16:20:04,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:04,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:04,975 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:05,730 INFO L93 Difference]: Finished difference Result 84600 states and 225611 transitions. [2021-07-09 16:20:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:05,915 INFO L225 Difference]: With dead ends: 84600 [2021-07-09 16:20:05,915 INFO L226 Difference]: Without dead ends: 84600 [2021-07-09 16:20:05,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84600 states. [2021-07-09 16:20:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84600 to 58370. [2021-07-09 16:20:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58370 states, 58368 states have (on average 2.6889220120614037) internal successors, (156947), 58369 states have internal predecessors, (156947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58370 states to 58370 states and 156947 transitions. [2021-07-09 16:20:07,481 INFO L78 Accepts]: Start accepts. Automaton has 58370 states and 156947 transitions. Word has length 356 [2021-07-09 16:20:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:07,482 INFO L482 AbstractCegarLoop]: Abstraction has 58370 states and 156947 transitions. [2021-07-09 16:20:07,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 58370 states and 156947 transitions. [2021-07-09 16:20:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:07,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:07,595 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:07,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 16:20:07,795 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash 58070783, now seen corresponding path program 15 times [2021-07-09 16:20:07,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:07,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635980590] [2021-07-09 16:20:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:07,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:07,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635980590] [2021-07-09 16:20:07,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635980590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:07,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311308508] [2021-07-09 16:20:07,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:08,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:20:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:08,842 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:08,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311308508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:08,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:08,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:20:08,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332024631] [2021-07-09 16:20:08,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:08,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:08,884 INFO L87 Difference]: Start difference. First operand 58370 states and 156947 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:09,447 INFO L93 Difference]: Finished difference Result 86910 states and 231422 transitions. [2021-07-09 16:20:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:20:09,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:09,636 INFO L225 Difference]: With dead ends: 86910 [2021-07-09 16:20:09,637 INFO L226 Difference]: Without dead ends: 86910 [2021-07-09 16:20:09,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86910 states. [2021-07-09 16:20:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86910 to 59630. [2021-07-09 16:20:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59630 states, 59628 states have (on average 2.6899443214597167) internal successors, (160396), 59629 states have internal predecessors, (160396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59630 states to 59630 states and 160396 transitions. [2021-07-09 16:20:11,262 INFO L78 Accepts]: Start accepts. Automaton has 59630 states and 160396 transitions. Word has length 356 [2021-07-09 16:20:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:11,262 INFO L482 AbstractCegarLoop]: Abstraction has 59630 states and 160396 transitions. [2021-07-09 16:20:11,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 59630 states and 160396 transitions. [2021-07-09 16:20:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:11,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:11,659 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:11,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:11,860 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash -719140575, now seen corresponding path program 16 times [2021-07-09 16:20:11,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:11,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161495602] [2021-07-09 16:20:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 800 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:20:11,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:11,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161495602] [2021-07-09 16:20:11,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161495602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:11,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281597430] [2021-07-09 16:20:11,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:12,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:12,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281597430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:12,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:12,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:20:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906241285] [2021-07-09 16:20:12,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:12,657 INFO L87 Difference]: Start difference. First operand 59630 states and 160396 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:13,438 INFO L93 Difference]: Finished difference Result 78235 states and 207498 transitions. [2021-07-09 16:20:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:20:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:13,603 INFO L225 Difference]: With dead ends: 78235 [2021-07-09 16:20:13,603 INFO L226 Difference]: Without dead ends: 78235 [2021-07-09 16:20:13,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78235 states. [2021-07-09 16:20:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78235 to 57690. [2021-07-09 16:20:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57690 states, 57688 states have (on average 2.68785535986687) internal successors, (155057), 57689 states have internal predecessors, (155057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57690 states to 57690 states and 155057 transitions. [2021-07-09 16:20:15,142 INFO L78 Accepts]: Start accepts. Automaton has 57690 states and 155057 transitions. Word has length 356 [2021-07-09 16:20:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:15,143 INFO L482 AbstractCegarLoop]: Abstraction has 57690 states and 155057 transitions. [2021-07-09 16:20:15,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 57690 states and 155057 transitions. [2021-07-09 16:20:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:15,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:15,245 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:15,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:15,446 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1710189981, now seen corresponding path program 17 times [2021-07-09 16:20:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:15,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423226426] [2021-07-09 16:20:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:15,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423226426] [2021-07-09 16:20:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423226426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280013704] [2021-07-09 16:20:15,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:16,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:20:16,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:16,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280013704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:16,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:16,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:16,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256208611] [2021-07-09 16:20:16,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:16,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:16,558 INFO L87 Difference]: Start difference. First operand 57690 states and 155057 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:17,361 INFO L93 Difference]: Finished difference Result 94765 states and 252835 transitions. [2021-07-09 16:20:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:17,567 INFO L225 Difference]: With dead ends: 94765 [2021-07-09 16:20:17,567 INFO L226 Difference]: Without dead ends: 94765 [2021-07-09 16:20:17,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94765 states. [2021-07-09 16:20:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94765 to 60990. [2021-07-09 16:20:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60990 states, 60988 states have (on average 2.691939397914344) internal successors, (164176), 60989 states have internal predecessors, (164176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60990 states to 60990 states and 164176 transitions. [2021-07-09 16:20:19,251 INFO L78 Accepts]: Start accepts. Automaton has 60990 states and 164176 transitions. Word has length 356 [2021-07-09 16:20:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:19,251 INFO L482 AbstractCegarLoop]: Abstraction has 60990 states and 164176 transitions. [2021-07-09 16:20:19,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 60990 states and 164176 transitions. [2021-07-09 16:20:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:19,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:19,354 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:19,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 16:20:19,554 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:19,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1353224383, now seen corresponding path program 18 times [2021-07-09 16:20:19,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:19,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953572317] [2021-07-09 16:20:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:19,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:19,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953572317] [2021-07-09 16:20:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953572317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:19,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856743190] [2021-07-09 16:20:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:20,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:20:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:20,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856743190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:20,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:20,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:20,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254914253] [2021-07-09 16:20:20,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:20,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:20,699 INFO L87 Difference]: Start difference. First operand 60990 states and 164176 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:21,471 INFO L93 Difference]: Finished difference Result 94500 states and 252439 transitions. [2021-07-09 16:20:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:20:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:21,684 INFO L225 Difference]: With dead ends: 94500 [2021-07-09 16:20:21,684 INFO L226 Difference]: Without dead ends: 94500 [2021-07-09 16:20:21,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=280, Invalid=776, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94500 states. [2021-07-09 16:20:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94500 to 61570. [2021-07-09 16:20:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61570 states, 61568 states have (on average 2.691901637214137) internal successors, (165735), 61569 states have internal predecessors, (165735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61570 states to 61570 states and 165735 transitions. [2021-07-09 16:20:23,281 INFO L78 Accepts]: Start accepts. Automaton has 61570 states and 165735 transitions. Word has length 356 [2021-07-09 16:20:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:23,281 INFO L482 AbstractCegarLoop]: Abstraction has 61570 states and 165735 transitions. [2021-07-09 16:20:23,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 61570 states and 165735 transitions. [2021-07-09 16:20:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:23,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:23,400 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 16:20:23,601 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1742574751, now seen corresponding path program 19 times [2021-07-09 16:20:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596123339] [2021-07-09 16:20:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:23,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596123339] [2021-07-09 16:20:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596123339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211256000] [2021-07-09 16:20:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:24,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211256000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:24,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:24,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747153148] [2021-07-09 16:20:24,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:24,612 INFO L87 Difference]: Start difference. First operand 61570 states and 165735 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:25,343 INFO L93 Difference]: Finished difference Result 85000 states and 225917 transitions. [2021-07-09 16:20:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:20:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:25,497 INFO L225 Difference]: With dead ends: 85000 [2021-07-09 16:20:25,497 INFO L226 Difference]: Without dead ends: 85000 [2021-07-09 16:20:25,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 16:20:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85000 states. [2021-07-09 16:20:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85000 to 60110. [2021-07-09 16:20:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60110 states, 60108 states have (on average 2.6894922472882143) internal successors, (161660), 60109 states have internal predecessors, (161660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60110 states to 60110 states and 161660 transitions. [2021-07-09 16:20:27,047 INFO L78 Accepts]: Start accepts. Automaton has 60110 states and 161660 transitions. Word has length 356 [2021-07-09 16:20:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:27,047 INFO L482 AbstractCegarLoop]: Abstraction has 60110 states and 161660 transitions. [2021-07-09 16:20:27,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60110 states and 161660 transitions. [2021-07-09 16:20:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:27,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:27,150 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:27,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 16:20:27,359 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:27,359 INFO L82 PathProgramCache]: Analyzing trace with hash -70944129, now seen corresponding path program 20 times [2021-07-09 16:20:27,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:27,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935986483] [2021-07-09 16:20:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:27,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935986483] [2021-07-09 16:20:27,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935986483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:27,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753598415] [2021-07-09 16:20:27,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:27,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:27,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:28,080 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:28,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753598415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:28,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:28,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299383108] [2021-07-09 16:20:28,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:28,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:28,226 INFO L87 Difference]: Start difference. First operand 60110 states and 161660 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:28,846 INFO L93 Difference]: Finished difference Result 102765 states and 275164 transitions. [2021-07-09 16:20:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:29,334 INFO L225 Difference]: With dead ends: 102765 [2021-07-09 16:20:29,335 INFO L226 Difference]: Without dead ends: 102765 [2021-07-09 16:20:29,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102765 states. [2021-07-09 16:20:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102765 to 62050. [2021-07-09 16:20:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62050 states, 62048 states have (on average 2.6914485559566788) internal successors, (166999), 62049 states have internal predecessors, (166999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62050 states to 62050 states and 166999 transitions. [2021-07-09 16:20:31,073 INFO L78 Accepts]: Start accepts. Automaton has 62050 states and 166999 transitions. Word has length 356 [2021-07-09 16:20:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:31,073 INFO L482 AbstractCegarLoop]: Abstraction has 62050 states and 166999 transitions. [2021-07-09 16:20:31,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 62050 states and 166999 transitions. [2021-07-09 16:20:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-07-09 16:20:31,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:31,192 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:31,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:31,392 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash -427909727, now seen corresponding path program 21 times [2021-07-09 16:20:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:31,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614925783] [2021-07-09 16:20:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:31,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:31,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614925783] [2021-07-09 16:20:31,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614925783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:31,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757026118] [2021-07-09 16:20:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:32,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 16:20:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:32,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 21 proven. 777 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:20:32,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757026118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:32,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:32,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-09 16:20:32,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774793589] [2021-07-09 16:20:32,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:20:32,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:32,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:20:32,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:20:32,545 INFO L87 Difference]: Start difference. First operand 62050 states and 166999 transitions. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:33,288 INFO L93 Difference]: Finished difference Result 84020 states and 223960 transitions. [2021-07-09 16:20:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:20:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-07-09 16:20:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:33,494 INFO L225 Difference]: With dead ends: 84020 [2021-07-09 16:20:33,494 INFO L226 Difference]: Without dead ends: 84020 [2021-07-09 16:20:33,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 16:20:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84020 states. [2021-07-09 16:20:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84020 to 64470. [2021-07-09 16:20:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64470 states, 64468 states have (on average 2.692839858534467) internal successors, (173602), 64469 states have internal predecessors, (173602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64470 states to 64470 states and 173602 transitions. [2021-07-09 16:20:35,120 INFO L78 Accepts]: Start accepts. Automaton has 64470 states and 173602 transitions. Word has length 356 [2021-07-09 16:20:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:35,121 INFO L482 AbstractCegarLoop]: Abstraction has 64470 states and 173602 transitions. [2021-07-09 16:20:35,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 64470 states and 173602 transitions. [2021-07-09 16:20:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-07-09 16:20:35,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:35,227 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:35,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:35,428 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1006996314, now seen corresponding path program 9 times [2021-07-09 16:20:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:35,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43237285] [2021-07-09 16:20:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:35,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:35,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43237285] [2021-07-09 16:20:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43237285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730574801] [2021-07-09 16:20:35,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:36,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:20:36,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:36,365 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:20:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730574801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:36,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:36,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-09 16:20:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552398668] [2021-07-09 16:20:36,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 16:20:36,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 16:20:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:20:36,681 INFO L87 Difference]: Start difference. First operand 64470 states and 173602 transitions. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:37,527 INFO L93 Difference]: Finished difference Result 74359 states and 198824 transitions. [2021-07-09 16:20:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:20:37,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2021-07-09 16:20:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:37,682 INFO L225 Difference]: With dead ends: 74359 [2021-07-09 16:20:37,683 INFO L226 Difference]: Without dead ends: 74359 [2021-07-09 16:20:37,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=601, Invalid=1205, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:20:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74359 states. [2021-07-09 16:20:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74359 to 66272. [2021-07-09 16:20:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66272 states, 66270 states have (on average 2.6891806247170664) internal successors, (178212), 66271 states have internal predecessors, (178212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66272 states to 66272 states and 178212 transitions. [2021-07-09 16:20:39,279 INFO L78 Accepts]: Start accepts. Automaton has 66272 states and 178212 transitions. Word has length 360 [2021-07-09 16:20:39,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:39,280 INFO L482 AbstractCegarLoop]: Abstraction has 66272 states and 178212 transitions. [2021-07-09 16:20:39,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 66272 states and 178212 transitions. [2021-07-09 16:20:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:20:39,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:39,400 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:39,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:39,600 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1945042650, now seen corresponding path program 20 times [2021-07-09 16:20:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875695440] [2021-07-09 16:20:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:20:39,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875695440] [2021-07-09 16:20:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875695440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164949110] [2021-07-09 16:20:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:39,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:20:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:40,349 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:40,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164949110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:40,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:40,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:20:40,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028760192] [2021-07-09 16:20:40,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:20:40,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:40,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:20:40,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:20:40,544 INFO L87 Difference]: Start difference. First operand 66272 states and 178212 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:41,254 INFO L93 Difference]: Finished difference Result 78842 states and 210214 transitions. [2021-07-09 16:20:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:20:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:20:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:41,504 INFO L225 Difference]: With dead ends: 78842 [2021-07-09 16:20:41,504 INFO L226 Difference]: Without dead ends: 78842 [2021-07-09 16:20:41,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:20:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78842 states. [2021-07-09 16:20:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78842 to 67632. [2021-07-09 16:20:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67632 states, 67630 states have (on average 2.69099512050865) internal successors, (181992), 67631 states have internal predecessors, (181992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67632 states to 67632 states and 181992 transitions. [2021-07-09 16:20:43,194 INFO L78 Accepts]: Start accepts. Automaton has 67632 states and 181992 transitions. Word has length 361 [2021-07-09 16:20:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:43,194 INFO L482 AbstractCegarLoop]: Abstraction has 67632 states and 181992 transitions. [2021-07-09 16:20:43,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 67632 states and 181992 transitions. [2021-07-09 16:20:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:20:43,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:43,311 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:43,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:43,512 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2007813128, now seen corresponding path program 21 times [2021-07-09 16:20:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994962461] [2021-07-09 16:20:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:43,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994962461] [2021-07-09 16:20:43,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994962461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379624574] [2021-07-09 16:20:43,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:44,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:20:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:44,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:44,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379624574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:44,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:44,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:20:44,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989831802] [2021-07-09 16:20:44,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:20:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:20:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:20:44,767 INFO L87 Difference]: Start difference. First operand 67632 states and 181992 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:45,590 INFO L93 Difference]: Finished difference Result 84237 states and 223851 transitions. [2021-07-09 16:20:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:20:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:20:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:45,757 INFO L225 Difference]: With dead ends: 84237 [2021-07-09 16:20:45,757 INFO L226 Difference]: Without dead ends: 84237 [2021-07-09 16:20:45,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:20:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84237 states. [2021-07-09 16:20:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84237 to 66952. [2021-07-09 16:20:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66952 states, 66950 states have (on average 2.690097087378641) internal successors, (180102), 66951 states have internal predecessors, (180102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66952 states to 66952 states and 180102 transitions. [2021-07-09 16:20:47,440 INFO L78 Accepts]: Start accepts. Automaton has 66952 states and 180102 transitions. Word has length 361 [2021-07-09 16:20:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 66952 states and 180102 transitions. [2021-07-09 16:20:47,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 66952 states and 180102 transitions. [2021-07-09 16:20:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:20:47,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:47,554 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:47,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 16:20:47,755 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1826090858, now seen corresponding path program 22 times [2021-07-09 16:20:47,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:47,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942425517] [2021-07-09 16:20:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:47,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942425517] [2021-07-09 16:20:47,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942425517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847162951] [2021-07-09 16:20:47,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:48,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:20:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:48,776 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847162951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:20:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253939997] [2021-07-09 16:20:49,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:20:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:20:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:20:49,108 INFO L87 Difference]: Start difference. First operand 66952 states and 180102 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:49,903 INFO L93 Difference]: Finished difference Result 87037 states and 232000 transitions. [2021-07-09 16:20:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:20:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:20:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:50,097 INFO L225 Difference]: With dead ends: 87037 [2021-07-09 16:20:50,097 INFO L226 Difference]: Without dead ends: 87037 [2021-07-09 16:20:50,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:20:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87037 states. [2021-07-09 16:20:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87037 to 68212. [2021-07-09 16:20:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68212 states, 68210 states have (on average 2.6909690661193375) internal successors, (183551), 68211 states have internal predecessors, (183551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68212 states to 68212 states and 183551 transitions. [2021-07-09 16:20:51,718 INFO L78 Accepts]: Start accepts. Automaton has 68212 states and 183551 transitions. Word has length 361 [2021-07-09 16:20:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:51,719 INFO L482 AbstractCegarLoop]: Abstraction has 68212 states and 183551 transitions. [2021-07-09 16:20:51,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 68212 states and 183551 transitions. [2021-07-09 16:20:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:20:51,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:51,830 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:52,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:52,030 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1217432396, now seen corresponding path program 23 times [2021-07-09 16:20:52,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:52,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527539375] [2021-07-09 16:20:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527539375] [2021-07-09 16:20:52,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527539375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:52,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315369980] [2021-07-09 16:20:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:52,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:20:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:52,704 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:20:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315369980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:53,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:53,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:20:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923987231] [2021-07-09 16:20:53,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:20:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:20:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:20:53,019 INFO L87 Difference]: Start difference. First operand 68212 states and 183551 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:53,854 INFO L93 Difference]: Finished difference Result 91482 states and 243654 transitions. [2021-07-09 16:20:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:20:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:20:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:54,048 INFO L225 Difference]: With dead ends: 91482 [2021-07-09 16:20:54,048 INFO L226 Difference]: Without dead ends: 91482 [2021-07-09 16:20:54,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:20:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91482 states. [2021-07-09 16:20:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91482 to 70152. [2021-07-09 16:20:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70152 states, 70150 states have (on average 2.692658588738418) internal successors, (188890), 70151 states have internal predecessors, (188890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70152 states to 70152 states and 188890 transitions. [2021-07-09 16:20:55,684 INFO L78 Accepts]: Start accepts. Automaton has 70152 states and 188890 transitions. Word has length 361 [2021-07-09 16:20:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:55,685 INFO L482 AbstractCegarLoop]: Abstraction has 70152 states and 188890 transitions. [2021-07-09 16:20:55,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 70152 states and 188890 transitions. [2021-07-09 16:20:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:20:55,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:20:55,818 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:20:56,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 16:20:56,019 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:20:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:20:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash 245579858, now seen corresponding path program 24 times [2021-07-09 16:20:56,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:20:56,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454401968] [2021-07-09 16:20:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:20:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:20:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:56,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:20:56,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454401968] [2021-07-09 16:20:56,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454401968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:56,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111256795] [2021-07-09 16:20:56,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:20:56,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:20:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:20:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:20:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:20:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:20:57,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111256795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:20:57,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:20:57,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:20:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141074919] [2021-07-09 16:20:57,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:20:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:20:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:20:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:20:57,230 INFO L87 Difference]: Start difference. First operand 70152 states and 188890 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:20:58,096 INFO L93 Difference]: Finished difference Result 94847 states and 252707 transitions. [2021-07-09 16:20:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:20:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:20:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:20:58,300 INFO L225 Difference]: With dead ends: 94847 [2021-07-09 16:20:58,300 INFO L226 Difference]: Without dead ends: 94847 [2021-07-09 16:20:58,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:20:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94847 states. [2021-07-09 16:20:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94847 to 73352. [2021-07-09 16:20:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-09 16:20:59,974 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-09 16:20:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:20:59,975 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-09 16:20:59,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:20:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-09 16:21:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:00,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:00,425 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:00,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 16:21:00,641 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash -961195152, now seen corresponding path program 25 times [2021-07-09 16:21:00,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:00,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817489958] [2021-07-09 16:21:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:00,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:00,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817489958] [2021-07-09 16:21:00,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817489958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:00,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140157019] [2021-07-09 16:21:00,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140157019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:01,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:01,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:01,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167935528] [2021-07-09 16:21:01,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:01,256 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:02,083 INFO L93 Difference]: Finished difference Result 91972 states and 244941 transitions. [2021-07-09 16:21:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:21:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:21:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:02,309 INFO L225 Difference]: With dead ends: 91972 [2021-07-09 16:21:02,309 INFO L226 Difference]: Without dead ends: 91972 [2021-07-09 16:21:02,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:21:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91972 states. [2021-07-09 16:21:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91972 to 73352. [2021-07-09 16:21:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73352 states, 73350 states have (on average 2.6949965916837084) internal successors, (197678), 73351 states have internal predecessors, (197678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73352 states to 73352 states and 197678 transitions. [2021-07-09 16:21:04,088 INFO L78 Accepts]: Start accepts. Automaton has 73352 states and 197678 transitions. Word has length 361 [2021-07-09 16:21:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:04,089 INFO L482 AbstractCegarLoop]: Abstraction has 73352 states and 197678 transitions. [2021-07-09 16:21:04,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73352 states and 197678 transitions. [2021-07-09 16:21:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-07-09 16:21:04,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:04,589 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:04,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:04,789 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1072722418, now seen corresponding path program 26 times [2021-07-09 16:21:04,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:04,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007524481] [2021-07-09 16:21:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:04,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007524481] [2021-07-09 16:21:04,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007524481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615910244] [2021-07-09 16:21:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:05,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 16:21:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 24 proven. 1038 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:21:05,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615910244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:05,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:05,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:21:05,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815294570] [2021-07-09 16:21:05,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:21:05,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:05,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:21:05,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:21:05,446 INFO L87 Difference]: Start difference. First operand 73352 states and 197678 transitions. Second operand has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:06,311 INFO L93 Difference]: Finished difference Result 91272 states and 243453 transitions. [2021-07-09 16:21:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:21:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-07-09 16:21:06,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:06,501 INFO L225 Difference]: With dead ends: 91272 [2021-07-09 16:21:06,501 INFO L226 Difference]: Without dead ends: 91272 [2021-07-09 16:21:06,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:21:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91272 states. [2021-07-09 16:21:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91272 to 72672. [2021-07-09 16:21:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72672 states, 72670 states have (on average 2.6942066877666164) internal successors, (195788), 72671 states have internal predecessors, (195788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72672 states to 72672 states and 195788 transitions. [2021-07-09 16:21:08,463 INFO L78 Accepts]: Start accepts. Automaton has 72672 states and 195788 transitions. Word has length 361 [2021-07-09 16:21:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:08,464 INFO L482 AbstractCegarLoop]: Abstraction has 72672 states and 195788 transitions. [2021-07-09 16:21:08,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 72672 states and 195788 transitions. [2021-07-09 16:21:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:21:08,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:08,590 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:08,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 16:21:08,791 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash -204708331, now seen corresponding path program 22 times [2021-07-09 16:21:08,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:08,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997268046] [2021-07-09 16:21:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:21:08,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:08,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997268046] [2021-07-09 16:21:08,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997268046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:08,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598074714] [2021-07-09 16:21:08,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:09,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:09,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:09,923 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 16:21:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598074714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:09,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:09,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:21:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632916018] [2021-07-09 16:21:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:21:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:21:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:21:09,926 INFO L87 Difference]: Start difference. First operand 72672 states and 195788 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:10,542 INFO L93 Difference]: Finished difference Result 104087 states and 277712 transitions. [2021-07-09 16:21:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:21:10,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-09 16:21:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:10,806 INFO L225 Difference]: With dead ends: 104087 [2021-07-09 16:21:10,806 INFO L226 Difference]: Without dead ends: 104087 [2021-07-09 16:21:10,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:21:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104087 states. [2021-07-09 16:21:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104087 to 74612. [2021-07-09 16:21:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74612 states, 74610 states have (on average 2.6957110306929364) internal successors, (201127), 74611 states have internal predecessors, (201127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74612 states to 74612 states and 201127 transitions. [2021-07-09 16:21:12,870 INFO L78 Accepts]: Start accepts. Automaton has 74612 states and 201127 transitions. Word has length 385 [2021-07-09 16:21:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:12,871 INFO L482 AbstractCegarLoop]: Abstraction has 74612 states and 201127 transitions. [2021-07-09 16:21:12,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 74612 states and 201127 transitions. [2021-07-09 16:21:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:21:12,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:12,999 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:13,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:13,200 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash 262396659, now seen corresponding path program 23 times [2021-07-09 16:21:13,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:13,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293993755] [2021-07-09 16:21:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:21:13,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293993755] [2021-07-09 16:21:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293993755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174098980] [2021-07-09 16:21:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:13,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 16:21:13,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174098980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:14,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:14,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:21:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782915541] [2021-07-09 16:21:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:21:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:21:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:21:14,334 INFO L87 Difference]: Start difference. First operand 74612 states and 201127 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:15,167 INFO L93 Difference]: Finished difference Result 111247 states and 297294 transitions. [2021-07-09 16:21:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:21:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-09 16:21:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:15,461 INFO L225 Difference]: With dead ends: 111247 [2021-07-09 16:21:15,461 INFO L226 Difference]: Without dead ends: 111247 [2021-07-09 16:21:15,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:21:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111247 states. [2021-07-09 16:21:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111247 to 75972. [2021-07-09 16:21:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75972 states, 75970 states have (on average 2.697209424772937) internal successors, (204907), 75971 states have internal predecessors, (204907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75972 states to 75972 states and 204907 transitions. [2021-07-09 16:21:17,611 INFO L78 Accepts]: Start accepts. Automaton has 75972 states and 204907 transitions. Word has length 385 [2021-07-09 16:21:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:17,612 INFO L482 AbstractCegarLoop]: Abstraction has 75972 states and 204907 transitions. [2021-07-09 16:21:17,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 75972 states and 204907 transitions. [2021-07-09 16:21:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:21:17,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:17,745 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:17,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 16:21:17,946 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash -94568939, now seen corresponding path program 24 times [2021-07-09 16:21:17,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:17,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531242807] [2021-07-09 16:21:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 821 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:21:18,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:18,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531242807] [2021-07-09 16:21:18,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531242807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:18,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908873047] [2021-07-09 16:21:18,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:18,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 16:21:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:19,141 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:21:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:19,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908873047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:19,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:19,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-09 16:21:19,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260544501] [2021-07-09 16:21:19,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:21:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:21:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:21:19,220 INFO L87 Difference]: Start difference. First operand 75972 states and 204907 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:19,774 INFO L93 Difference]: Finished difference Result 96182 states and 255392 transitions. [2021-07-09 16:21:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:21:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-09 16:21:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:19,996 INFO L225 Difference]: With dead ends: 96182 [2021-07-09 16:21:19,996 INFO L226 Difference]: Without dead ends: 96182 [2021-07-09 16:21:19,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:21:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96182 states. [2021-07-09 16:21:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96182 to 70352. [2021-07-09 16:21:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70352 states, 70350 states have (on average 2.693901918976546) internal successors, (189516), 70351 states have internal predecessors, (189516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 189516 transitions. [2021-07-09 16:21:21,981 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 189516 transitions. Word has length 385 [2021-07-09 16:21:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:21,982 INFO L482 AbstractCegarLoop]: Abstraction has 70352 states and 189516 transitions. [2021-07-09 16:21:21,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 189516 transitions. [2021-07-09 16:21:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-07-09 16:21:22,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:22,100 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:22,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:22,300 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 420103411, now seen corresponding path program 25 times [2021-07-09 16:21:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949050180] [2021-07-09 16:21:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:22,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949050180] [2021-07-09 16:21:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949050180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874237385] [2021-07-09 16:21:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:22,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:22,911 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:21:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 21 proven. 798 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:21:23,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874237385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:23,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:23,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-09 16:21:23,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117645781] [2021-07-09 16:21:23,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 16:21:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 16:21:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 16:21:23,267 INFO L87 Difference]: Start difference. First operand 70352 states and 189516 transitions. Second operand has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:24,137 INFO L93 Difference]: Finished difference Result 110607 states and 294134 transitions. [2021-07-09 16:21:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:21:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 385 [2021-07-09 16:21:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:24,488 INFO L225 Difference]: With dead ends: 110607 [2021-07-09 16:21:24,488 INFO L226 Difference]: Without dead ends: 110607 [2021-07-09 16:21:24,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:21:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110607 states. [2021-07-09 16:21:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110607 to 79172. [2021-07-09 16:21:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79172 states, 79170 states have (on average 2.6996463306808134) internal successors, (213731), 79171 states have internal predecessors, (213731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79172 states to 79172 states and 213731 transitions. [2021-07-09 16:21:26,777 INFO L78 Accepts]: Start accepts. Automaton has 79172 states and 213731 transitions. Word has length 385 [2021-07-09 16:21:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:26,777 INFO L482 AbstractCegarLoop]: Abstraction has 79172 states and 213731 transitions. [2021-07-09 16:21:26,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 21.25) internal successors, (340), 16 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 79172 states and 213731 transitions. [2021-07-09 16:21:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:26,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:26,904 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:27,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 16:21:27,105 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash 143556378, now seen corresponding path program 26 times [2021-07-09 16:21:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:27,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873981394] [2021-07-09 16:21:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:27,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873981394] [2021-07-09 16:21:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873981394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59585705] [2021-07-09 16:21:27,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:27,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:27,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:28,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59585705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:28,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:28,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:21:28,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797953741] [2021-07-09 16:21:28,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:28,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:28,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:28,096 INFO L87 Difference]: Start difference. First operand 79172 states and 213731 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:28,957 INFO L93 Difference]: Finished difference Result 110172 states and 294666 transitions. [2021-07-09 16:21:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:21:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:29,227 INFO L225 Difference]: With dead ends: 110172 [2021-07-09 16:21:29,227 INFO L226 Difference]: Without dead ends: 110172 [2021-07-09 16:21:29,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:21:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110172 states. [2021-07-09 16:21:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110172 to 79852. [2021-07-09 16:21:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:21:31,470 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:21:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:31,471 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:21:31,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:21:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:31,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:31,609 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:31,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:31,810 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash -213409220, now seen corresponding path program 27 times [2021-07-09 16:21:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:31,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082284916] [2021-07-09 16:21:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:31,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:31,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082284916] [2021-07-09 16:21:31,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082284916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:31,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188396201] [2021-07-09 16:21:31,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:32,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:21:32,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:32,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188396201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:32,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:32,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:21:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281441112] [2021-07-09 16:21:32,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:32,957 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:33,685 INFO L93 Difference]: Finished difference Result 114067 states and 305249 transitions. [2021-07-09 16:21:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:21:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:34,189 INFO L225 Difference]: With dead ends: 114067 [2021-07-09 16:21:34,190 INFO L226 Difference]: Without dead ends: 114067 [2021-07-09 16:21:34,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:21:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114067 states. [2021-07-09 16:21:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114067 to 79852. [2021-07-09 16:21:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:21:36,078 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:21:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:36,079 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:21:36,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:21:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:36,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:36,606 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:36,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 16:21:36,809 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 985758942, now seen corresponding path program 28 times [2021-07-09 16:21:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:36,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740940694] [2021-07-09 16:21:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:36,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740940694] [2021-07-09 16:21:36,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740940694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347271501] [2021-07-09 16:21:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:37,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:21:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347271501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:21:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424010913] [2021-07-09 16:21:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:37,755 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:38,665 INFO L93 Difference]: Finished difference Result 115432 states and 309095 transitions. [2021-07-09 16:21:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:38,942 INFO L225 Difference]: With dead ends: 115432 [2021-07-09 16:21:38,942 INFO L226 Difference]: Without dead ends: 115432 [2021-07-09 16:21:38,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115432 states. [2021-07-09 16:21:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115432 to 78592. [2021-07-09 16:21:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78592 states, 78590 states have (on average 2.6997327904313524) internal successors, (212172), 78591 states have internal predecessors, (212172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78592 states to 78592 states and 212172 transitions. [2021-07-09 16:21:41,189 INFO L78 Accepts]: Start accepts. Automaton has 78592 states and 212172 transitions. Word has length 390 [2021-07-09 16:21:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:41,189 INFO L482 AbstractCegarLoop]: Abstraction has 78592 states and 212172 transitions. [2021-07-09 16:21:41,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 78592 states and 212172 transitions. [2021-07-09 16:21:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:41,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:41,729 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:41,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:41,940 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 208547584, now seen corresponding path program 29 times [2021-07-09 16:21:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:41,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456496237] [2021-07-09 16:21:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:42,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456496237] [2021-07-09 16:21:42,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456496237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997409871] [2021-07-09 16:21:42,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:42,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:21:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:42,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997409871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:42,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:42,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:21:42,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352316968] [2021-07-09 16:21:42,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:42,691 INFO L87 Difference]: Start difference. First operand 78592 states and 212172 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:43,573 INFO L93 Difference]: Finished difference Result 113602 states and 303457 transitions. [2021-07-09 16:21:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:21:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:43,863 INFO L225 Difference]: With dead ends: 113602 [2021-07-09 16:21:43,864 INFO L226 Difference]: Without dead ends: 113602 [2021-07-09 16:21:43,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:21:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113602 states. [2021-07-09 16:21:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113602 to 79852. [2021-07-09 16:21:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:21:46,084 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:21:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:46,085 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:21:46,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:21:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:46,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:46,221 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:46,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 16:21:46,422 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash -784869214, now seen corresponding path program 30 times [2021-07-09 16:21:46,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:46,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458043847] [2021-07-09 16:21:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1053 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:21:47,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:47,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458043847] [2021-07-09 16:21:47,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458043847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:47,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006003031] [2021-07-09 16:21:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:47,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:21:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:47,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006003031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:47,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:47,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-09 16:21:47,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856283955] [2021-07-09 16:21:47,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:47,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:47,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:47,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:47,778 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:48,599 INFO L93 Difference]: Finished difference Result 102417 states and 272783 transitions. [2021-07-09 16:21:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:21:48,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:48,830 INFO L225 Difference]: With dead ends: 102417 [2021-07-09 16:21:48,830 INFO L226 Difference]: Without dead ends: 102417 [2021-07-09 16:21:48,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:21:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102417 states. [2021-07-09 16:21:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102417 to 77232. [2021-07-09 16:21:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77232 states, 77230 states have (on average 2.698329664638094) internal successors, (208392), 77231 states have internal predecessors, (208392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77232 states to 77232 states and 208392 transitions. [2021-07-09 16:21:51,012 INFO L78 Accepts]: Start accepts. Automaton has 77232 states and 208392 transitions. Word has length 390 [2021-07-09 16:21:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:51,012 INFO L482 AbstractCegarLoop]: Abstraction has 77232 states and 208392 transitions. [2021-07-09 16:21:51,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 77232 states and 208392 transitions. [2021-07-09 16:21:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:51,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:51,147 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:51,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 16:21:51,348 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash -266388740, now seen corresponding path program 31 times [2021-07-09 16:21:51,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:51,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017706668] [2021-07-09 16:21:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:51,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017706668] [2021-07-09 16:21:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017706668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:51,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505007770] [2021-07-09 16:21:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:52,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505007770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:52,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:52,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:21:52,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657362229] [2021-07-09 16:21:52,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:52,292 INFO L87 Difference]: Start difference. First operand 77232 states and 208392 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:53,248 INFO L93 Difference]: Finished difference Result 120732 states and 322804 transitions. [2021-07-09 16:21:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:21:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:53,550 INFO L225 Difference]: With dead ends: 120732 [2021-07-09 16:21:53,551 INFO L226 Difference]: Without dead ends: 120732 [2021-07-09 16:21:53,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:21:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120732 states. [2021-07-09 16:21:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120732 to 80532. [2021-07-09 16:21:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80532 states, 80530 states have (on average 2.7009934186017635) internal successors, (217511), 80531 states have internal predecessors, (217511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80532 states to 80532 states and 217511 transitions. [2021-07-09 16:21:55,836 INFO L78 Accepts]: Start accepts. Automaton has 80532 states and 217511 transitions. Word has length 390 [2021-07-09 16:21:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:21:55,836 INFO L482 AbstractCegarLoop]: Abstraction has 80532 states and 217511 transitions. [2021-07-09 16:21:55,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80532 states and 217511 transitions. [2021-07-09 16:21:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:21:55,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:21:55,981 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:21:56,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 16:21:56,182 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:21:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:21:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -623354338, now seen corresponding path program 32 times [2021-07-09 16:21:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:21:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557982125] [2021-07-09 16:21:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:21:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:21:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:56,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:21:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557982125] [2021-07-09 16:21:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557982125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546821778] [2021-07-09 16:21:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:21:56,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:21:56,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:21:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:21:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:21:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:21:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546821778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:21:57,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:21:57,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:21:57,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191157489] [2021-07-09 16:21:57,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:21:57,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:21:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:21:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:21:57,082 INFO L87 Difference]: Start difference. First operand 80532 states and 217511 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:21:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:21:58,029 INFO L93 Difference]: Finished difference Result 125277 states and 335467 transitions. [2021-07-09 16:21:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:21:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:21:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:21:58,357 INFO L225 Difference]: With dead ends: 125277 [2021-07-09 16:21:58,357 INFO L226 Difference]: Without dead ends: 125277 [2021-07-09 16:21:58,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:21:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125277 states. [2021-07-09 16:22:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125277 to 79852. [2021-07-09 16:22:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79852 states, 79850 states have (on average 2.7003256105197244) internal successors, (215621), 79851 states have internal predecessors, (215621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79852 states to 79852 states and 215621 transitions. [2021-07-09 16:22:00,704 INFO L78 Accepts]: Start accepts. Automaton has 79852 states and 215621 transitions. Word has length 390 [2021-07-09 16:22:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:00,704 INFO L482 AbstractCegarLoop]: Abstraction has 79852 states and 215621 transitions. [2021-07-09 16:22:00,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79852 states and 215621 transitions. [2021-07-09 16:22:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:00,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:00,883 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:01,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:01,083 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 575813824, now seen corresponding path program 33 times [2021-07-09 16:22:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:01,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515237549] [2021-07-09 16:22:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:01,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515237549] [2021-07-09 16:22:01,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515237549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8471680] [2021-07-09 16:22:01,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:01,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:22:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:01,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8471680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:01,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:01,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:01,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797774788] [2021-07-09 16:22:01,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:01,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:01,922 INFO L87 Difference]: Start difference. First operand 79852 states and 215621 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:02,899 INFO L93 Difference]: Finished difference Result 125532 states and 336473 transitions. [2021-07-09 16:22:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:02,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:03,453 INFO L225 Difference]: With dead ends: 125532 [2021-07-09 16:22:03,454 INFO L226 Difference]: Without dead ends: 125532 [2021-07-09 16:22:03,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125532 states. [2021-07-09 16:22:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125532 to 82372. [2021-07-09 16:22:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82372 states, 82370 states have (on average 2.7014568410829187) internal successors, (222519), 82371 states have internal predecessors, (222519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82372 states to 82372 states and 222519 transitions. [2021-07-09 16:22:05,847 INFO L78 Accepts]: Start accepts. Automaton has 82372 states and 222519 transitions. Word has length 390 [2021-07-09 16:22:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:05,848 INFO L482 AbstractCegarLoop]: Abstraction has 82372 states and 222519 transitions. [2021-07-09 16:22:05,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 82372 states and 222519 transitions. [2021-07-09 16:22:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:06,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:06,249 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:06,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:06,463 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -201397534, now seen corresponding path program 34 times [2021-07-09 16:22:06,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:06,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462540550] [2021-07-09 16:22:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:06,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462540550] [2021-07-09 16:22:06,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462540550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852434713] [2021-07-09 16:22:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:07,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:07,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852434713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:07,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:07,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:07,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061999890] [2021-07-09 16:22:07,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:07,583 INFO L87 Difference]: Start difference. First operand 82372 states and 222519 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:08,393 INFO L93 Difference]: Finished difference Result 110512 states and 294631 transitions. [2021-07-09 16:22:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:22:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:08,654 INFO L225 Difference]: With dead ends: 110512 [2021-07-09 16:22:08,654 INFO L226 Difference]: Without dead ends: 110512 [2021-07-09 16:22:08,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:22:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110512 states. [2021-07-09 16:22:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110512 to 80912. [2021-07-09 16:22:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80912 states, 80910 states have (on average 2.699839327648004) internal successors, (218444), 80911 states have internal predecessors, (218444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80912 states to 80912 states and 218444 transitions. [2021-07-09 16:22:10,916 INFO L78 Accepts]: Start accepts. Automaton has 80912 states and 218444 transitions. Word has length 390 [2021-07-09 16:22:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:10,917 INFO L482 AbstractCegarLoop]: Abstraction has 80912 states and 218444 transitions. [2021-07-09 16:22:10,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80912 states and 218444 transitions. [2021-07-09 16:22:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:11,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:11,069 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:11,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:11,273 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2067034274, now seen corresponding path program 35 times [2021-07-09 16:22:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:11,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159445505] [2021-07-09 16:22:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:11,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:11,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159445505] [2021-07-09 16:22:11,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159445505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:11,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477480264] [2021-07-09 16:22:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:11,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:22:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:11,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:12,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477480264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:12,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:12,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:12,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655470221] [2021-07-09 16:22:12,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:12,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:12,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:12,397 INFO L87 Difference]: Start difference. First operand 80912 states and 218444 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:13,326 INFO L93 Difference]: Finished difference Result 137412 states and 368979 transitions. [2021-07-09 16:22:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:22:13,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:13,664 INFO L225 Difference]: With dead ends: 137412 [2021-07-09 16:22:13,664 INFO L226 Difference]: Without dead ends: 137412 [2021-07-09 16:22:13,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:22:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137412 states. [2021-07-09 16:22:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137412 to 86832. [2021-07-09 16:22:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86832 states, 86830 states have (on average 2.704042381665323) internal successors, (234792), 86831 states have internal predecessors, (234792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86832 states to 86832 states and 234792 transitions. [2021-07-09 16:22:16,482 INFO L78 Accepts]: Start accepts. Automaton has 86832 states and 234792 transitions. Word has length 390 [2021-07-09 16:22:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:16,482 INFO L482 AbstractCegarLoop]: Abstraction has 86832 states and 234792 transitions. [2021-07-09 16:22:16,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 86832 states and 234792 transitions. [2021-07-09 16:22:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:16,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:16,695 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:16,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 16:22:16,896 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1870967424, now seen corresponding path program 36 times [2021-07-09 16:22:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:16,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685724724] [2021-07-09 16:22:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:17,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:17,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685724724] [2021-07-09 16:22:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685724724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:17,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322954208] [2021-07-09 16:22:17,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:17,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:22:17,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:17,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322954208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:17,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:17,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:17,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075147144] [2021-07-09 16:22:17,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:17,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:17,792 INFO L87 Difference]: Start difference. First operand 86832 states and 234792 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:19,100 INFO L93 Difference]: Finished difference Result 144457 states and 388581 transitions. [2021-07-09 16:22:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:22:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:19,509 INFO L225 Difference]: With dead ends: 144457 [2021-07-09 16:22:19,509 INFO L226 Difference]: Without dead ends: 144457 [2021-07-09 16:22:19,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:22:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144457 states. [2021-07-09 16:22:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144457 to 87412. [2021-07-09 16:22:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87412 states, 87410 states have (on average 2.7039354764901042) internal successors, (236351), 87411 states have internal predecessors, (236351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87412 states to 87412 states and 236351 transitions. [2021-07-09 16:22:22,088 INFO L78 Accepts]: Start accepts. Automaton has 87412 states and 236351 transitions. Word has length 390 [2021-07-09 16:22:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:22,089 INFO L482 AbstractCegarLoop]: Abstraction has 87412 states and 236351 transitions. [2021-07-09 16:22:22,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 87412 states and 236351 transitions. [2021-07-09 16:22:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:22,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:22,249 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:22,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:22,451 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:22,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1224831710, now seen corresponding path program 37 times [2021-07-09 16:22:22,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:22,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725550142] [2021-07-09 16:22:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:22,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725550142] [2021-07-09 16:22:22,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725550142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997906738] [2021-07-09 16:22:22,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:23,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997906738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:23,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:23,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:23,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552314462] [2021-07-09 16:22:23,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:23,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:23,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:23,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:23,472 INFO L87 Difference]: Start difference. First operand 87412 states and 236351 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:24,324 INFO L93 Difference]: Finished difference Result 116352 states and 311553 transitions. [2021-07-09 16:22:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 16:22:24,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:24,631 INFO L225 Difference]: With dead ends: 116352 [2021-07-09 16:22:24,631 INFO L226 Difference]: Without dead ends: 116352 [2021-07-09 16:22:24,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 16:22:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116352 states. [2021-07-09 16:22:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116352 to 85952. [2021-07-09 16:22:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85952 states, 85950 states have (on average 2.702454915648633) internal successors, (232276), 85951 states have internal predecessors, (232276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85952 states to 85952 states and 232276 transitions. [2021-07-09 16:22:26,968 INFO L78 Accepts]: Start accepts. Automaton has 85952 states and 232276 transitions. Word has length 390 [2021-07-09 16:22:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:26,968 INFO L482 AbstractCegarLoop]: Abstraction has 85952 states and 232276 transitions. [2021-07-09 16:22:26,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 85952 states and 232276 transitions. [2021-07-09 16:22:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:27,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:27,118 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:27,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:27,319 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash 446798912, now seen corresponding path program 38 times [2021-07-09 16:22:27,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:27,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106993424] [2021-07-09 16:22:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:27,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:27,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106993424] [2021-07-09 16:22:27,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106993424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:27,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629700542] [2021-07-09 16:22:27,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:27,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:22:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629700542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:28,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:28,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:28,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011104489] [2021-07-09 16:22:28,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:28,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:28,350 INFO L87 Difference]: Start difference. First operand 85952 states and 232276 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:29,367 INFO L93 Difference]: Finished difference Result 149432 states and 401906 transitions. [2021-07-09 16:22:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:22:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:29,745 INFO L225 Difference]: With dead ends: 149432 [2021-07-09 16:22:29,745 INFO L226 Difference]: Without dead ends: 149432 [2021-07-09 16:22:29,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:22:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149432 states. [2021-07-09 16:22:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149432 to 88572. [2021-07-09 16:22:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88572 states, 88570 states have (on average 2.704132324714915) internal successors, (239505), 88571 states have internal predecessors, (239505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88572 states to 88572 states and 239505 transitions. [2021-07-09 16:22:32,678 INFO L78 Accepts]: Start accepts. Automaton has 88572 states and 239505 transitions. Word has length 390 [2021-07-09 16:22:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:32,678 INFO L482 AbstractCegarLoop]: Abstraction has 88572 states and 239505 transitions. [2021-07-09 16:22:32,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 88572 states and 239505 transitions. [2021-07-09 16:22:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:32,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:32,843 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:33,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:33,044 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 89833314, now seen corresponding path program 39 times [2021-07-09 16:22:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:33,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262217039] [2021-07-09 16:22:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:33,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:33,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262217039] [2021-07-09 16:22:33,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262217039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:33,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430008240] [2021-07-09 16:22:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:33,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:22:33,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:33,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430008240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:34,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:34,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472095367] [2021-07-09 16:22:34,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:34,255 INFO L87 Difference]: Start difference. First operand 88572 states and 239505 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:35,283 INFO L93 Difference]: Finished difference Result 127447 states and 340869 transitions. [2021-07-09 16:22:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:22:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:35,624 INFO L225 Difference]: With dead ends: 127447 [2021-07-09 16:22:35,625 INFO L226 Difference]: Without dead ends: 127447 [2021-07-09 16:22:35,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:22:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127447 states. [2021-07-09 16:22:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127447 to 85492. [2021-07-09 16:22:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85492 states, 85490 states have (on average 2.7005614691776816) internal successors, (230871), 85491 states have internal predecessors, (230871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85492 states to 85492 states and 230871 transitions. [2021-07-09 16:22:38,126 INFO L78 Accepts]: Start accepts. Automaton has 85492 states and 230871 transitions. Word has length 390 [2021-07-09 16:22:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:38,126 INFO L482 AbstractCegarLoop]: Abstraction has 85492 states and 230871 transitions. [2021-07-09 16:22:38,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 85492 states and 230871 transitions. [2021-07-09 16:22:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-07-09 16:22:38,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:38,269 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:38,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 16:22:38,469 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:38,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:38,470 INFO L82 PathProgramCache]: Analyzing trace with hash -751337054, now seen corresponding path program 40 times [2021-07-09 16:22:38,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:38,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175345410] [2021-07-09 16:22:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:38,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:38,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175345410] [2021-07-09 16:22:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175345410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:38,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737315076] [2021-07-09 16:22:38,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:39,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 24 proven. 1030 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:22:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737315076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:39,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:39,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-09 16:22:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085798233] [2021-07-09 16:22:39,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 16:22:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 16:22:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 16:22:39,695 INFO L87 Difference]: Start difference. First operand 85492 states and 230871 transitions. Second operand has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:40,573 INFO L93 Difference]: Finished difference Result 110267 states and 294603 transitions. [2021-07-09 16:22:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:22:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2021-07-09 16:22:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:40,834 INFO L225 Difference]: With dead ends: 110267 [2021-07-09 16:22:40,835 INFO L226 Difference]: Without dead ends: 110267 [2021-07-09 16:22:40,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:22:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110267 states. [2021-07-09 16:22:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110267 to 86752. [2021-07-09 16:22:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86752 states, 86750 states have (on average 2.701095100864553) internal successors, (234320), 86751 states have internal predecessors, (234320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86752 states to 86752 states and 234320 transitions. [2021-07-09 16:22:43,210 INFO L78 Accepts]: Start accepts. Automaton has 86752 states and 234320 transitions. Word has length 390 [2021-07-09 16:22:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:43,211 INFO L482 AbstractCegarLoop]: Abstraction has 86752 states and 234320 transitions. [2021-07-09 16:22:43,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 86752 states and 234320 transitions. [2021-07-09 16:22:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-07-09 16:22:43,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:43,376 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:43,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:43,577 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 657247387, now seen corresponding path program 10 times [2021-07-09 16:22:43,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:43,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910961860] [2021-07-09 16:22:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:22:43,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910961860] [2021-07-09 16:22:43,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910961860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795943073] [2021-07-09 16:22:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:44,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:44,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:22:44,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795943073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:44,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:44,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-09 16:22:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106729413] [2021-07-09 16:22:44,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 16:22:44,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 16:22:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-09 16:22:44,981 INFO L87 Difference]: Start difference. First operand 86752 states and 234320 transitions. Second operand has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:45,978 INFO L93 Difference]: Finished difference Result 98251 states and 263785 transitions. [2021-07-09 16:22:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:22:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2021-07-09 16:22:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:46,357 INFO L225 Difference]: With dead ends: 98251 [2021-07-09 16:22:46,358 INFO L226 Difference]: Without dead ends: 98251 [2021-07-09 16:22:46,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=716, Invalid=1446, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:22:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98251 states. [2021-07-09 16:22:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98251 to 89234. [2021-07-09 16:22:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89234 states, 89232 states have (on average 2.6988076026537566) internal successors, (240820), 89233 states have internal predecessors, (240820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89234 states to 89234 states and 240820 transitions. [2021-07-09 16:22:48,619 INFO L78 Accepts]: Start accepts. Automaton has 89234 states and 240820 transitions. Word has length 394 [2021-07-09 16:22:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:48,619 INFO L482 AbstractCegarLoop]: Abstraction has 89234 states and 240820 transitions. [2021-07-09 16:22:48,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 17.64) internal successors, (441), 25 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 89234 states and 240820 transitions. [2021-07-09 16:22:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:22:48,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:48,797 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:49,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:49,010 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:49,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash -279355365, now seen corresponding path program 27 times [2021-07-09 16:22:49,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:49,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311367962] [2021-07-09 16:22:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1348 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:22:49,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:49,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311367962] [2021-07-09 16:22:49,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311367962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:49,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247137805] [2021-07-09 16:22:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:49,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:22:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:50,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247137805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:50,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:50,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-09 16:22:50,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763798498] [2021-07-09 16:22:50,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:22:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:22:50,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:22:50,381 INFO L87 Difference]: Start difference. First operand 89234 states and 240820 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:51,232 INFO L93 Difference]: Finished difference Result 103444 states and 276915 transitions. [2021-07-09 16:22:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:22:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:22:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:51,483 INFO L225 Difference]: With dead ends: 103444 [2021-07-09 16:22:51,483 INFO L226 Difference]: Without dead ends: 103444 [2021-07-09 16:22:51,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:22:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103444 states. [2021-07-09 16:22:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103444 to 89914. [2021-07-09 16:22:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-09 16:22:53,848 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-09 16:22:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:53,848 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-09 16:22:53,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-09 16:22:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:22:54,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:54,011 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:54,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 16:22:54,212 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash -673788487, now seen corresponding path program 28 times [2021-07-09 16:22:54,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:54,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20706896] [2021-07-09 16:22:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:54,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:54,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20706896] [2021-07-09 16:22:54,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20706896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:54,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308179690] [2021-07-09 16:22:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:54,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:22:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:22:55,379 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:22:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308179690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:55,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:22:55,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:22:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115871035] [2021-07-09 16:22:55,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:22:55,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:22:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:22:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:22:55,501 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:22:56,453 INFO L93 Difference]: Finished difference Result 110429 states and 294732 transitions. [2021-07-09 16:22:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:22:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:22:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:22:56,742 INFO L225 Difference]: With dead ends: 110429 [2021-07-09 16:22:56,743 INFO L226 Difference]: Without dead ends: 110429 [2021-07-09 16:22:56,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:22:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110429 states. [2021-07-09 16:22:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110429 to 89914. [2021-07-09 16:22:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89914 states, 89912 states have (on average 2.699417207936649) internal successors, (242710), 89913 states have internal predecessors, (242710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89914 states to 89914 states and 242710 transitions. [2021-07-09 16:22:59,002 INFO L78 Accepts]: Start accepts. Automaton has 89914 states and 242710 transitions. Word has length 395 [2021-07-09 16:22:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:22:59,002 INFO L482 AbstractCegarLoop]: Abstraction has 89914 states and 242710 transitions. [2021-07-09 16:22:59,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:22:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 89914 states and 242710 transitions. [2021-07-09 16:22:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:22:59,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:22:59,179 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:22:59,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:59,380 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:22:59,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:22:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash -331676969, now seen corresponding path program 29 times [2021-07-09 16:22:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:22:59,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869853562] [2021-07-09 16:22:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:22:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:22:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:22:59,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:22:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869853562] [2021-07-09 16:22:59,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869853562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:22:59,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740519185] [2021-07-09 16:22:59,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:22:59,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:22:59,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:22:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:22:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:00,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740519185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:00,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:00,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:00,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654121936] [2021-07-09 16:23:00,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:00,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:00,607 INFO L87 Difference]: Start difference. First operand 89914 states and 242710 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:01,536 INFO L93 Difference]: Finished difference Result 111689 states and 298642 transitions. [2021-07-09 16:23:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:23:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:01,827 INFO L225 Difference]: With dead ends: 111689 [2021-07-09 16:23:01,828 INFO L226 Difference]: Without dead ends: 111689 [2021-07-09 16:23:01,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:23:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111689 states. [2021-07-09 16:23:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111689 to 88554. [2021-07-09 16:23:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88554 states, 88552 states have (on average 2.698188634926371) internal successors, (238930), 88553 states have internal predecessors, (238930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88554 states to 88554 states and 238930 transitions. [2021-07-09 16:23:04,233 INFO L78 Accepts]: Start accepts. Automaton has 88554 states and 238930 transitions. Word has length 395 [2021-07-09 16:23:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:04,234 INFO L482 AbstractCegarLoop]: Abstraction has 88554 states and 238930 transitions. [2021-07-09 16:23:04,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 88554 states and 238930 transitions. [2021-07-09 16:23:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:04,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:04,395 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:04,609 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -149954699, now seen corresponding path program 30 times [2021-07-09 16:23:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845655983] [2021-07-09 16:23:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:04,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:04,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845655983] [2021-07-09 16:23:04,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845655983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:04,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107987858] [2021-07-09 16:23:04,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:05,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:23:05,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:05,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:05,833 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107987858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:05,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:05,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203757495] [2021-07-09 16:23:05,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:05,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:05,950 INFO L87 Difference]: Start difference. First operand 88554 states and 238930 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:06,893 INFO L93 Difference]: Finished difference Result 117004 states and 312456 transitions. [2021-07-09 16:23:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:23:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:07,178 INFO L225 Difference]: With dead ends: 117004 [2021-07-09 16:23:07,179 INFO L226 Difference]: Without dead ends: 117004 [2021-07-09 16:23:07,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:23:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117004 states. [2021-07-09 16:23:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117004 to 89814. [2021-07-09 16:23:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89814 states, 89812 states have (on average 2.6987373624905358) internal successors, (242379), 89813 states have internal predecessors, (242379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89814 states to 89814 states and 242379 transitions. [2021-07-09 16:23:09,648 INFO L78 Accepts]: Start accepts. Automaton has 89814 states and 242379 transitions. Word has length 395 [2021-07-09 16:23:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:09,649 INFO L482 AbstractCegarLoop]: Abstraction has 89814 states and 242379 transitions. [2021-07-09 16:23:09,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 89814 states and 242379 transitions. [2021-07-09 16:23:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:09,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:09,806 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:10,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:10,006 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 458703763, now seen corresponding path program 31 times [2021-07-09 16:23:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:10,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482151518] [2021-07-09 16:23:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:10,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482151518] [2021-07-09 16:23:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482151518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727378811] [2021-07-09 16:23:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:10,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:10,770 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:11,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727378811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:11,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:11,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:11,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209772142] [2021-07-09 16:23:11,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:11,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:11,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:11,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:11,038 INFO L87 Difference]: Start difference. First operand 89814 states and 242379 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:11,977 INFO L93 Difference]: Finished difference Result 119859 states and 319930 transitions. [2021-07-09 16:23:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:23:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:12,269 INFO L225 Difference]: With dead ends: 119859 [2021-07-09 16:23:12,269 INFO L226 Difference]: Without dead ends: 119859 [2021-07-09 16:23:12,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:23:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119859 states. [2021-07-09 16:23:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119859 to 91754. [2021-07-09 16:23:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91754 states, 91752 states have (on average 2.6998648530822216) internal successors, (247718), 91753 states have internal predecessors, (247718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91754 states to 91754 states and 247718 transitions. [2021-07-09 16:23:14,779 INFO L78 Accepts]: Start accepts. Automaton has 91754 states and 247718 transitions. Word has length 395 [2021-07-09 16:23:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:14,779 INFO L482 AbstractCegarLoop]: Abstraction has 91754 states and 247718 transitions. [2021-07-09 16:23:14,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 91754 states and 247718 transitions. [2021-07-09 16:23:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:14,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:14,945 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:15,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:15,145 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1921716017, now seen corresponding path program 32 times [2021-07-09 16:23:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:15,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309078350] [2021-07-09 16:23:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:15,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309078350] [2021-07-09 16:23:15,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309078350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:15,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366769011] [2021-07-09 16:23:15,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:15,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:23:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:16,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366769011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:16,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:16,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872579626] [2021-07-09 16:23:16,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:16,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:16,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:16,256 INFO L87 Difference]: Start difference. First operand 91754 states and 247718 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:17,176 INFO L93 Difference]: Finished difference Result 120574 states and 321904 transitions. [2021-07-09 16:23:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:23:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:17,462 INFO L225 Difference]: With dead ends: 120574 [2021-07-09 16:23:17,462 INFO L226 Difference]: Without dead ends: 120574 [2021-07-09 16:23:17,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:23:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120574 states. [2021-07-09 16:23:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120574 to 90494. [2021-07-09 16:23:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-09 16:23:19,932 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-09 16:23:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-09 16:23:19,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-09 16:23:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:20,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:20,090 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:20,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:20,291 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:20,291 INFO L82 PathProgramCache]: Analyzing trace with hash 714941007, now seen corresponding path program 33 times [2021-07-09 16:23:20,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:20,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250471895] [2021-07-09 16:23:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:20,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:20,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250471895] [2021-07-09 16:23:20,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250471895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:20,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079268488] [2021-07-09 16:23:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:21,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:23:21,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:21,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079268488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:21,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:21,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:21,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416262123] [2021-07-09 16:23:21,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:21,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:21,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:21,719 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:22,646 INFO L93 Difference]: Finished difference Result 116589 states and 311298 transitions. [2021-07-09 16:23:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:23:22,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:22,908 INFO L225 Difference]: With dead ends: 116589 [2021-07-09 16:23:22,908 INFO L226 Difference]: Without dead ends: 116589 [2021-07-09 16:23:22,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:23:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116589 states. [2021-07-09 16:23:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116589 to 90494. [2021-07-09 16:23:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90494 states, 90492 states have (on average 2.6993435883835035) internal successors, (244269), 90493 states have internal predecessors, (244269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90494 states to 90494 states and 244269 transitions. [2021-07-09 16:23:25,297 INFO L78 Accepts]: Start accepts. Automaton has 90494 states and 244269 transitions. Word has length 395 [2021-07-09 16:23:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:25,297 INFO L482 AbstractCegarLoop]: Abstraction has 90494 states and 244269 transitions. [2021-07-09 16:23:25,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 90494 states and 244269 transitions. [2021-07-09 16:23:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-07-09 16:23:25,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:25,887 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:26,121 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash 603413741, now seen corresponding path program 34 times [2021-07-09 16:23:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287922046] [2021-07-09 16:23:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:26,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287922046] [2021-07-09 16:23:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287922046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438858968] [2021-07-09 16:23:26,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:26,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:23:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 16:23:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 27 proven. 1325 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:23:27,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438858968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:27,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:27,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-09 16:23:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757154780] [2021-07-09 16:23:27,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 16:23:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 16:23:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:23:27,127 INFO L87 Difference]: Start difference. First operand 90494 states and 244269 transitions. Second operand has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:28,313 INFO L93 Difference]: Finished difference Result 113179 states and 302510 transitions. [2021-07-09 16:23:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 16:23:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 395 [2021-07-09 16:23:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:28,597 INFO L225 Difference]: With dead ends: 113179 [2021-07-09 16:23:28,597 INFO L226 Difference]: Without dead ends: 113179 [2021-07-09 16:23:28,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=586, Invalid=1670, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:23:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113179 states. [2021-07-09 16:23:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113179 to 88454. [2021-07-09 16:23:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88454 states, 88452 states have (on average 2.6974969474969477) internal successors, (238599), 88453 states have internal predecessors, (238599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88454 states to 88454 states and 238599 transitions. [2021-07-09 16:23:30,883 INFO L78 Accepts]: Start accepts. Automaton has 88454 states and 238599 transitions. Word has length 395 [2021-07-09 16:23:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:30,883 INFO L482 AbstractCegarLoop]: Abstraction has 88454 states and 238599 transitions. [2021-07-09 16:23:30,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 88454 states and 238599 transitions. [2021-07-09 16:23:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:23:31,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:31,509 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:31,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 16:23:31,729 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash 444637334, now seen corresponding path program 41 times [2021-07-09 16:23:31,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:31,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385254829] [2021-07-09 16:23:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:23:31,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385254829] [2021-07-09 16:23:31,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385254829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:31,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412793104] [2021-07-09 16:23:31,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:32,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:23:32,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:32,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:23:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:23:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412793104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:32,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:32,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:23:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255884017] [2021-07-09 16:23:32,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:23:32,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:23:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:23:32,678 INFO L87 Difference]: Start difference. First operand 88454 states and 238599 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:33,087 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:23:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:33,667 INFO L93 Difference]: Finished difference Result 129819 states and 347657 transitions. [2021-07-09 16:23:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:23:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:23:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:34,006 INFO L225 Difference]: With dead ends: 129819 [2021-07-09 16:23:34,006 INFO L226 Difference]: Without dead ends: 129819 [2021-07-09 16:23:34,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129819 states. [2021-07-09 16:23:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129819 to 91074. [2021-07-09 16:23:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91074 states, 91072 states have (on average 2.6992709065354883) internal successors, (245828), 91073 states have internal predecessors, (245828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91074 states to 91074 states and 245828 transitions. [2021-07-09 16:23:36,789 INFO L78 Accepts]: Start accepts. Automaton has 91074 states and 245828 transitions. Word has length 419 [2021-07-09 16:23:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:36,790 INFO L482 AbstractCegarLoop]: Abstraction has 91074 states and 245828 transitions. [2021-07-09 16:23:36,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 91074 states and 245828 transitions. [2021-07-09 16:23:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:23:36,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:36,975 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:37,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:37,176 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash 911742324, now seen corresponding path program 42 times [2021-07-09 16:23:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728359325] [2021-07-09 16:23:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:23:37,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:37,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728359325] [2021-07-09 16:23:37,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728359325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:37,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511409912] [2021-07-09 16:23:37,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:37,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:23:37,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:23:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:38,365 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:23:38,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511409912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:38,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:38,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:23:38,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885375308] [2021-07-09 16:23:38,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:23:38,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:38,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:23:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:23:38,526 INFO L87 Difference]: Start difference. First operand 91074 states and 245828 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:39,564 INFO L93 Difference]: Finished difference Result 156634 states and 420817 transitions. [2021-07-09 16:23:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:23:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:23:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:39,993 INFO L225 Difference]: With dead ends: 156634 [2021-07-09 16:23:39,994 INFO L226 Difference]: Without dead ends: 156634 [2021-07-09 16:23:39,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:23:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156634 states. [2021-07-09 16:23:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156634 to 93114. [2021-07-09 16:23:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93114 states, 93112 states have (on average 2.7010267205086347) internal successors, (251498), 93113 states have internal predecessors, (251498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93114 states to 93114 states and 251498 transitions. [2021-07-09 16:23:43,020 INFO L78 Accepts]: Start accepts. Automaton has 93114 states and 251498 transitions. Word has length 419 [2021-07-09 16:23:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:43,020 INFO L482 AbstractCegarLoop]: Abstraction has 93114 states and 251498 transitions. [2021-07-09 16:23:43,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93114 states and 251498 transitions. [2021-07-09 16:23:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:23:43,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:43,210 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:43,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 16:23:43,411 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 554776726, now seen corresponding path program 43 times [2021-07-09 16:23:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:43,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509289693] [2021-07-09 16:23:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:23:43,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509289693] [2021-07-09 16:23:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509289693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911993124] [2021-07-09 16:23:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:23:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:23:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911993124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:23:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17199338] [2021-07-09 16:23:44,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:23:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:23:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:23:44,306 INFO L87 Difference]: Start difference. First operand 93114 states and 251498 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:45,049 INFO L93 Difference]: Finished difference Result 132029 states and 353121 transitions. [2021-07-09 16:23:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:23:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:23:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:45,624 INFO L225 Difference]: With dead ends: 132029 [2021-07-09 16:23:45,624 INFO L226 Difference]: Without dead ends: 132029 [2021-07-09 16:23:45,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:23:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132029 states. [2021-07-09 16:23:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132029 to 94374. [2021-07-09 16:23:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94374 states, 94372 states have (on average 2.701511041410588) internal successors, (254947), 94373 states have internal predecessors, (254947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94374 states to 94374 states and 254947 transitions. [2021-07-09 16:23:48,213 INFO L78 Accepts]: Start accepts. Automaton has 94374 states and 254947 transitions. Word has length 419 [2021-07-09 16:23:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:48,213 INFO L482 AbstractCegarLoop]: Abstraction has 94374 states and 254947 transitions. [2021-07-09 16:23:48,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 94374 states and 254947 transitions. [2021-07-09 16:23:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:23:48,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:48,373 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:48,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 16:23:48,578 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 55104210, now seen corresponding path program 44 times [2021-07-09 16:23:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:48,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031000393] [2021-07-09 16:23:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:23:48,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:48,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031000393] [2021-07-09 16:23:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031000393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:48,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203741395] [2021-07-09 16:23:48,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:49,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:23:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:23:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:23:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203741395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:49,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:49,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:23:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336949169] [2021-07-09 16:23:49,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:23:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:23:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:23:49,620 INFO L87 Difference]: Start difference. First operand 94374 states and 254947 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:50,819 INFO L93 Difference]: Finished difference Result 140364 states and 376050 transitions. [2021-07-09 16:23:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:23:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:23:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:51,204 INFO L225 Difference]: With dead ends: 140364 [2021-07-09 16:23:51,205 INFO L226 Difference]: Without dead ends: 140364 [2021-07-09 16:23:51,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:23:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140364 states. [2021-07-09 16:23:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140364 to 95734. [2021-07-09 16:23:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:23:54,189 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:23:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:54,190 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:23:54,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:23:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:23:54,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:23:54,357 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:23:54,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:54,573 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:23:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:23:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -301861388, now seen corresponding path program 45 times [2021-07-09 16:23:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:23:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377154647] [2021-07-09 16:23:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:23:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:23:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:23:54,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:23:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377154647] [2021-07-09 16:23:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377154647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423617259] [2021-07-09 16:23:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:23:55,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 16:23:55,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:23:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:23:55,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:23:55,593 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:23:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:23:55,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423617259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:23:55,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:23:55,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:23:55,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232059731] [2021-07-09 16:23:55,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:23:55,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:23:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:23:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:23:55,742 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:23:56,733 INFO L93 Difference]: Finished difference Result 144764 states and 387949 transitions. [2021-07-09 16:23:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:23:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:23:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:23:57,125 INFO L225 Difference]: With dead ends: 144764 [2021-07-09 16:23:57,125 INFO L226 Difference]: Without dead ends: 144764 [2021-07-09 16:23:57,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:23:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144764 states. [2021-07-09 16:23:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144764 to 95734. [2021-07-09 16:23:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:23:59,776 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:23:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:23:59,776 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:23:59,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:23:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:24:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:00,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:00,427 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:00,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:00,628 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 897306774, now seen corresponding path program 46 times [2021-07-09 16:24:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:00,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332525061] [2021-07-09 16:24:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1074 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:24:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332525061] [2021-07-09 16:24:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332525061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157294414] [2021-07-09 16:24:00,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:01,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:01,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:01,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157294414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:01,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:01,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-09 16:24:01,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107000405] [2021-07-09 16:24:01,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:01,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:01,732 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:02,594 INFO L93 Difference]: Finished difference Result 124319 states and 331120 transitions. [2021-07-09 16:24:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:02,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:02,889 INFO L225 Difference]: With dead ends: 124319 [2021-07-09 16:24:02,889 INFO L226 Difference]: Without dead ends: 124319 [2021-07-09 16:24:02,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124319 states. [2021-07-09 16:24:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124319 to 91374. [2021-07-09 16:24:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91374 states, 91372 states have (on average 2.7008821083045134) internal successors, (246785), 91373 states have internal predecessors, (246785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91374 states to 91374 states and 246785 transitions. [2021-07-09 16:24:05,665 INFO L78 Accepts]: Start accepts. Automaton has 91374 states and 246785 transitions. Word has length 419 [2021-07-09 16:24:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:05,665 INFO L482 AbstractCegarLoop]: Abstraction has 91374 states and 246785 transitions. [2021-07-09 16:24:05,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91374 states and 246785 transitions. [2021-07-09 16:24:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:05,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:05,829 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:06,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:06,030 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -692238348, now seen corresponding path program 47 times [2021-07-09 16:24:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:06,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091168038] [2021-07-09 16:24:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:06,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:06,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091168038] [2021-07-09 16:24:06,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091168038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:06,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748326968] [2021-07-09 16:24:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:06,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 16:24:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:07,015 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:24:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:07,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748326968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:07,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:07,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:07,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938944599] [2021-07-09 16:24:07,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:07,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:07,143 INFO L87 Difference]: Start difference. First operand 91374 states and 246785 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:08,146 INFO L93 Difference]: Finished difference Result 136274 states and 365083 transitions. [2021-07-09 16:24:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:08,738 INFO L225 Difference]: With dead ends: 136274 [2021-07-09 16:24:08,738 INFO L226 Difference]: Without dead ends: 136274 [2021-07-09 16:24:08,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136274 states. [2021-07-09 16:24:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136274 to 92634. [2021-07-09 16:24:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92634 states, 92632 states have (on average 2.701377493738665) internal successors, (250234), 92633 states have internal predecessors, (250234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92634 states to 92634 states and 250234 transitions. [2021-07-09 16:24:11,539 INFO L78 Accepts]: Start accepts. Automaton has 92634 states and 250234 transitions. Word has length 419 [2021-07-09 16:24:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 92634 states and 250234 transitions. [2021-07-09 16:24:11,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 92634 states and 250234 transitions. [2021-07-09 16:24:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:11,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:11,702 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:11,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 16:24:11,903 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash -225133358, now seen corresponding path program 48 times [2021-07-09 16:24:11,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405245794] [2021-07-09 16:24:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:12,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:12,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405245794] [2021-07-09 16:24:12,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405245794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:12,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082905058] [2021-07-09 16:24:12,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:12,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:24:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:13,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082905058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:13,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:13,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925463152] [2021-07-09 16:24:13,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:13,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:13,220 INFO L87 Difference]: Start difference. First operand 92634 states and 250234 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:14,224 INFO L93 Difference]: Finished difference Result 145904 states and 391249 transitions. [2021-07-09 16:24:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:14,553 INFO L225 Difference]: With dead ends: 145904 [2021-07-09 16:24:14,553 INFO L226 Difference]: Without dead ends: 145904 [2021-07-09 16:24:14,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145904 states. [2021-07-09 16:24:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145904 to 95734. [2021-07-09 16:24:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95734 states, 95732 states have (on average 2.7026177244808425) internal successors, (258727), 95733 states have internal predecessors, (258727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95734 states to 95734 states and 258727 transitions. [2021-07-09 16:24:17,517 INFO L78 Accepts]: Start accepts. Automaton has 95734 states and 258727 transitions. Word has length 419 [2021-07-09 16:24:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:17,517 INFO L482 AbstractCegarLoop]: Abstraction has 95734 states and 258727 transitions. [2021-07-09 16:24:17,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 95734 states and 258727 transitions. [2021-07-09 16:24:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:17,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:17,681 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:17,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:17,881 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash -582098956, now seen corresponding path program 49 times [2021-07-09 16:24:17,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:17,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903193265] [2021-07-09 16:24:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:18,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903193265] [2021-07-09 16:24:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903193265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872098261] [2021-07-09 16:24:18,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:18,605 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:24:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872098261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:18,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:18,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515399075] [2021-07-09 16:24:18,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:18,910 INFO L87 Difference]: Start difference. First operand 95734 states and 258727 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:19,756 INFO L93 Difference]: Finished difference Result 121809 states and 324362 transitions. [2021-07-09 16:24:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 16:24:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:20,068 INFO L225 Difference]: With dead ends: 121809 [2021-07-09 16:24:20,068 INFO L226 Difference]: Without dead ends: 121809 [2021-07-09 16:24:20,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 16:24:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121809 states. [2021-07-09 16:24:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121809 to 90114. [2021-07-09 16:24:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90114 states, 90112 states have (on average 2.7003728693181817) internal successors, (243336), 90113 states have internal predecessors, (243336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90114 states to 90114 states and 243336 transitions. [2021-07-09 16:24:22,531 INFO L78 Accepts]: Start accepts. Automaton has 90114 states and 243336 transitions. Word has length 419 [2021-07-09 16:24:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:22,532 INFO L482 AbstractCegarLoop]: Abstraction has 90114 states and 243336 transitions. [2021-07-09 16:24:22,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90114 states and 243336 transitions. [2021-07-09 16:24:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-07-09 16:24:22,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:22,691 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-09 16:24:22,892 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash -67426606, now seen corresponding path program 50 times [2021-07-09 16:24:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117969914] [2021-07-09 16:24:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:23,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:23,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117969914] [2021-07-09 16:24:23,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117969914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:23,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271900180] [2021-07-09 16:24:23,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:23,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:23,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 24 proven. 1051 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:24:24,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271900180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:24,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:24,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-09 16:24:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357422179] [2021-07-09 16:24:24,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 16:24:24,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 16:24:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 16:24:24,051 INFO L87 Difference]: Start difference. First operand 90114 states and 243336 transitions. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:24,550 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-09 16:24:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:25,000 INFO L93 Difference]: Finished difference Result 135089 states and 360890 transitions. [2021-07-09 16:24:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:24:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2021-07-09 16:24:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:25,318 INFO L225 Difference]: With dead ends: 135089 [2021-07-09 16:24:25,319 INFO L226 Difference]: Without dead ends: 135089 [2021-07-09 16:24:25,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:24:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135089 states. [2021-07-09 16:24:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135089 to 101354. [2021-07-09 16:24:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101354 states, 101352 states have (on average 2.7049688215328755) internal successors, (274154), 101353 states have internal predecessors, (274154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101354 states to 101354 states and 274154 transitions. [2021-07-09 16:24:28,419 INFO L78 Accepts]: Start accepts. Automaton has 101354 states and 274154 transitions. Word has length 419 [2021-07-09 16:24:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:28,420 INFO L482 AbstractCegarLoop]: Abstraction has 101354 states and 274154 transitions. [2021-07-09 16:24:28,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 101354 states and 274154 transitions. [2021-07-09 16:24:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:24:28,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:28,617 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:28,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:28,818 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -946885319, now seen corresponding path program 51 times [2021-07-09 16:24:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:28,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241367501] [2021-07-09 16:24:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:24:29,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241367501] [2021-07-09 16:24:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241367501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079176670] [2021-07-09 16:24:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:24:29,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:24:30,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079176670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:30,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:30,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:24:30,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714213935] [2021-07-09 16:24:30,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:24:30,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:24:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:24:30,374 INFO L87 Difference]: Start difference. First operand 101354 states and 274154 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:31,373 INFO L93 Difference]: Finished difference Result 139589 states and 374175 transitions. [2021-07-09 16:24:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:24:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:24:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:31,725 INFO L225 Difference]: With dead ends: 139589 [2021-07-09 16:24:31,725 INFO L226 Difference]: Without dead ends: 139589 [2021-07-09 16:24:31,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:24:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139589 states. [2021-07-09 16:24:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139589 to 102714. [2021-07-09 16:24:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102714 states, 102712 states have (on average 2.705954513591401) internal successors, (277934), 102713 states have internal predecessors, (277934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102714 states to 102714 states and 277934 transitions. [2021-07-09 16:24:34,814 INFO L78 Accepts]: Start accepts. Automaton has 102714 states and 277934 transitions. Word has length 424 [2021-07-09 16:24:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:34,815 INFO L482 AbstractCegarLoop]: Abstraction has 102714 states and 277934 transitions. [2021-07-09 16:24:34,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 102714 states and 277934 transitions. [2021-07-09 16:24:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:24:35,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:35,032 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:35,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:35,233 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1303850917, now seen corresponding path program 52 times [2021-07-09 16:24:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818085210] [2021-07-09 16:24:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:24:35,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818085210] [2021-07-09 16:24:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818085210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:35,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884416374] [2021-07-09 16:24:35,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:36,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:36,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:24:36,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884416374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:36,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:24:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620144598] [2021-07-09 16:24:36,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:24:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:24:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:24:36,666 INFO L87 Difference]: Start difference. First operand 102714 states and 277934 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:37,623 INFO L93 Difference]: Finished difference Result 144454 states and 387269 transitions. [2021-07-09 16:24:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:24:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:24:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:37,976 INFO L225 Difference]: With dead ends: 144454 [2021-07-09 16:24:37,977 INFO L226 Difference]: Without dead ends: 144454 [2021-07-09 16:24:37,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:24:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144454 states. [2021-07-09 16:24:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144454 to 102034. [2021-07-09 16:24:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:24:41,097 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:24:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:41,097 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:24:41,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:24:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:24:41,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:41,295 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:41,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 16:24:41,497 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash -104682755, now seen corresponding path program 53 times [2021-07-09 16:24:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:41,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369530607] [2021-07-09 16:24:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:24:41,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369530607] [2021-07-09 16:24:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369530607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912171848] [2021-07-09 16:24:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:42,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:24:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:42,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:24:42,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912171848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:42,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:42,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:24:42,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991511774] [2021-07-09 16:24:42,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:24:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:24:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:24:42,712 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:43,699 INFO L93 Difference]: Finished difference Result 147569 states and 395715 transitions. [2021-07-09 16:24:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:24:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:24:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:44,053 INFO L225 Difference]: With dead ends: 147569 [2021-07-09 16:24:44,054 INFO L226 Difference]: Without dead ends: 147569 [2021-07-09 16:24:44,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:24:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147569 states. [2021-07-09 16:24:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147569 to 102034. [2021-07-09 16:24:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:24:47,635 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:24:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:47,635 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:24:47,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:24:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:24:47,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:47,915 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:48,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 16:24:48,129 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash -881894113, now seen corresponding path program 54 times [2021-07-09 16:24:48,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:48,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523910095] [2021-07-09 16:24:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:24:48,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523910095] [2021-07-09 16:24:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523910095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882643322] [2021-07-09 16:24:48,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:49,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:24:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:24:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882643322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:49,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:49,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:24:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898904846] [2021-07-09 16:24:49,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:24:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:24:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:24:49,703 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:50,732 INFO L93 Difference]: Finished difference Result 143364 states and 384352 transitions. [2021-07-09 16:24:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:24:50,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:24:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:51,079 INFO L225 Difference]: With dead ends: 143364 [2021-07-09 16:24:51,080 INFO L226 Difference]: Without dead ends: 143364 [2021-07-09 16:24:51,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:24:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143364 states. [2021-07-09 16:24:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143364 to 103974. [2021-07-09 16:24:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:24:54,296 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:24:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:54,296 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:24:54,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:24:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:24:54,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:54,507 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:54,708 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1875310911, now seen corresponding path program 55 times [2021-07-09 16:24:54,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:54,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618321032] [2021-07-09 16:24:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:24:54,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618321032] [2021-07-09 16:24:54,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618321032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972896081] [2021-07-09 16:24:54,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:24:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:24:55,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972896081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:55,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:55,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:24:55,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113473387] [2021-07-09 16:24:55,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:24:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:24:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:24:55,786 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:56,766 INFO L93 Difference]: Finished difference Result 144574 states and 387062 transitions. [2021-07-09 16:24:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:24:56,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:24:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:57,133 INFO L225 Difference]: With dead ends: 144574 [2021-07-09 16:24:57,134 INFO L226 Difference]: Without dead ends: 144574 [2021-07-09 16:24:57,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:24:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144574 states. [2021-07-09 16:24:59,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144574 to 103974. [2021-07-09 16:24:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:00,231 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:00,232 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:00,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:00,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:00,450 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:00,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 16:25:00,653 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 243386339, now seen corresponding path program 56 times [2021-07-09 16:25:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587135693] [2021-07-09 16:25:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1340 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-07-09 16:25:00,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587135693] [2021-07-09 16:25:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587135693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:00,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104385496] [2021-07-09 16:25:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:01,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104385496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:01,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-09 16:25:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072462744] [2021-07-09 16:25:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:01,748 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:02,686 INFO L93 Difference]: Finished difference Result 132039 states and 352888 transitions. [2021-07-09 16:25:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:03,011 INFO L225 Difference]: With dead ends: 132039 [2021-07-09 16:25:03,012 INFO L226 Difference]: Without dead ends: 132039 [2021-07-09 16:25:03,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:25:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132039 states. [2021-07-09 16:25:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132039 to 103974. [2021-07-09 16:25:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:06,185 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:06,186 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:06,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:06,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:06,418 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:06,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 16:25:06,618 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -359993189, now seen corresponding path program 57 times [2021-07-09 16:25:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:06,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110984899] [2021-07-09 16:25:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:06,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110984899] [2021-07-09 16:25:06,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110984899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549687298] [2021-07-09 16:25:06,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:07,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:25:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:07,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:07,779 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:25:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549687298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:08,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:08,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787381090] [2021-07-09 16:25:08,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:08,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:08,081 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:09,137 INFO L93 Difference]: Finished difference Result 153639 states and 411702 transitions. [2021-07-09 16:25:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:25:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:09,517 INFO L225 Difference]: With dead ends: 153639 [2021-07-09 16:25:09,517 INFO L226 Difference]: Without dead ends: 153639 [2021-07-09 16:25:09,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:25:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153639 states. [2021-07-09 16:25:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153639 to 104654. [2021-07-09 16:25:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104654 states, 104652 states have (on average 2.7068092344150134) internal successors, (283273), 104653 states have internal predecessors, (283273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104654 states to 104654 states and 283273 transitions. [2021-07-09 16:25:12,819 INFO L78 Accepts]: Start accepts. Automaton has 104654 states and 283273 transitions. Word has length 424 [2021-07-09 16:25:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:12,819 INFO L482 AbstractCegarLoop]: Abstraction has 104654 states and 283273 transitions. [2021-07-09 16:25:12,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 104654 states and 283273 transitions. [2021-07-09 16:25:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:13,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:13,064 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:13,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 16:25:13,265 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:13,266 INFO L82 PathProgramCache]: Analyzing trace with hash -716958787, now seen corresponding path program 58 times [2021-07-09 16:25:13,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:13,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919741889] [2021-07-09 16:25:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:13,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:13,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919741889] [2021-07-09 16:25:13,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919741889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:13,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589038772] [2021-07-09 16:25:13,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:14,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589038772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:14,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:14,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992558174] [2021-07-09 16:25:14,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:14,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:14,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:14,774 INFO L87 Difference]: Start difference. First operand 104654 states and 283273 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:15,811 INFO L93 Difference]: Finished difference Result 160034 states and 429296 transitions. [2021-07-09 16:25:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:25:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:16,468 INFO L225 Difference]: With dead ends: 160034 [2021-07-09 16:25:16,468 INFO L226 Difference]: Without dead ends: 160034 [2021-07-09 16:25:16,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:25:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160034 states. [2021-07-09 16:25:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160034 to 103974. [2021-07-09 16:25:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:19,435 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:19,435 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:19,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:19,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:19,664 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:19,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:19,865 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 482209375, now seen corresponding path program 59 times [2021-07-09 16:25:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:19,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266276995] [2021-07-09 16:25:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:20,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266276995] [2021-07-09 16:25:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266276995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527996260] [2021-07-09 16:25:20,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:20,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:25:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:21,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527996260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:21,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:21,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:21,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171631433] [2021-07-09 16:25:21,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:21,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:21,158 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:21,572 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 16:25:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:22,287 INFO L93 Difference]: Finished difference Result 162759 states and 436942 transitions. [2021-07-09 16:25:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:25:22,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:23,141 INFO L225 Difference]: With dead ends: 162759 [2021-07-09 16:25:23,141 INFO L226 Difference]: Without dead ends: 162759 [2021-07-09 16:25:23,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=458, Invalid=1264, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:25:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162759 states. [2021-07-09 16:25:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162759 to 102034. [2021-07-09 16:25:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102034 states, 102032 states have (on average 2.7054649521718677) internal successors, (276044), 102033 states have internal predecessors, (276044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102034 states to 102034 states and 276044 transitions. [2021-07-09 16:25:26,253 INFO L78 Accepts]: Start accepts. Automaton has 102034 states and 276044 transitions. Word has length 424 [2021-07-09 16:25:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:26,253 INFO L482 AbstractCegarLoop]: Abstraction has 102034 states and 276044 transitions. [2021-07-09 16:25:26,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 102034 states and 276044 transitions. [2021-07-09 16:25:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:26,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:26,465 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:26,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 16:25:26,666 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -295001983, now seen corresponding path program 60 times [2021-07-09 16:25:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:26,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54448444] [2021-07-09 16:25:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:27,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54448444] [2021-07-09 16:25:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54448444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448093490] [2021-07-09 16:25:27,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:27,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:25:27,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:28,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448093490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:28,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:28,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:28,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346624364] [2021-07-09 16:25:28,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:28,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:28,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:28,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:28,273 INFO L87 Difference]: Start difference. First operand 102034 states and 276044 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:29,378 INFO L93 Difference]: Finished difference Result 159244 states and 427729 transitions. [2021-07-09 16:25:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:30,034 INFO L225 Difference]: With dead ends: 159244 [2021-07-09 16:25:30,034 INFO L226 Difference]: Without dead ends: 159244 [2021-07-09 16:25:30,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1192, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:25:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159244 states. [2021-07-09 16:25:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159244 to 103294. [2021-07-09 16:25:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-09 16:25:32,909 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-09 16:25:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:32,910 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-09 16:25:32,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-09 16:25:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:33,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:33,617 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:33,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 16:25:33,817 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1288418781, now seen corresponding path program 61 times [2021-07-09 16:25:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:33,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660070321] [2021-07-09 16:25:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:33,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:33,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660070321] [2021-07-09 16:25:33,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660070321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:33,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254767793] [2021-07-09 16:25:33,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:34,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254767793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:34,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:34,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:34,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893513503] [2021-07-09 16:25:34,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:34,533 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:35,582 INFO L93 Difference]: Finished difference Result 134784 states and 359855 transitions. [2021-07-09 16:25:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:25:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:36,180 INFO L225 Difference]: With dead ends: 134784 [2021-07-09 16:25:36,180 INFO L226 Difference]: Without dead ends: 134784 [2021-07-09 16:25:36,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:25:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134784 states. [2021-07-09 16:25:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134784 to 98054. [2021-07-09 16:25:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98054 states, 98052 states have (on average 2.7030045282095214) internal successors, (265035), 98053 states have internal predecessors, (265035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98054 states to 98054 states and 265035 transitions. [2021-07-09 16:25:38,888 INFO L78 Accepts]: Start accepts. Automaton has 98054 states and 265035 transitions. Word has length 424 [2021-07-09 16:25:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:38,888 INFO L482 AbstractCegarLoop]: Abstraction has 98054 states and 265035 transitions. [2021-07-09 16:25:38,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 98054 states and 265035 transitions. [2021-07-09 16:25:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:39,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:39,058 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:39,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 16:25:39,259 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash -769938307, now seen corresponding path program 62 times [2021-07-09 16:25:39,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:39,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158912048] [2021-07-09 16:25:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:39,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:39,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158912048] [2021-07-09 16:25:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158912048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:39,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974920099] [2021-07-09 16:25:39,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:39,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:25:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:39,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:40,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974920099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:40,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:40,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:40,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042089019] [2021-07-09 16:25:40,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:40,438 INFO L87 Difference]: Start difference. First operand 98054 states and 265035 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:41,532 INFO L93 Difference]: Finished difference Result 164019 states and 440596 transitions. [2021-07-09 16:25:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:25:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:42,248 INFO L225 Difference]: With dead ends: 164019 [2021-07-09 16:25:42,248 INFO L226 Difference]: Without dead ends: 164019 [2021-07-09 16:25:42,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 684.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:25:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164019 states. [2021-07-09 16:25:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164019 to 103974. [2021-07-09 16:25:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103974 states, 103972 states have (on average 2.706334397722464) internal successors, (281383), 103973 states have internal predecessors, (281383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103974 states to 103974 states and 281383 transitions. [2021-07-09 16:25:45,254 INFO L78 Accepts]: Start accepts. Automaton has 103974 states and 281383 transitions. Word has length 424 [2021-07-09 16:25:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:45,254 INFO L482 AbstractCegarLoop]: Abstraction has 103974 states and 281383 transitions. [2021-07-09 16:25:45,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 103974 states and 281383 transitions. [2021-07-09 16:25:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:45,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:45,924 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:46,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:46,125 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:46,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1126903905, now seen corresponding path program 63 times [2021-07-09 16:25:46,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:46,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577162751] [2021-07-09 16:25:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:46,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577162751] [2021-07-09 16:25:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577162751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137641962] [2021-07-09 16:25:46,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:46,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:25:46,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137641962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:47,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:47,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257990784] [2021-07-09 16:25:47,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:47,221 INFO L87 Difference]: Start difference. First operand 103974 states and 281383 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:48,671 INFO L93 Difference]: Finished difference Result 175214 states and 471458 transitions. [2021-07-09 16:25:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:25:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:49,177 INFO L225 Difference]: With dead ends: 175214 [2021-07-09 16:25:49,178 INFO L226 Difference]: Without dead ends: 175214 [2021-07-09 16:25:49,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1337, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:25:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175214 states. [2021-07-09 16:25:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175214 to 103294. [2021-07-09 16:25:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103292 states have (on average 2.705853309065562) internal successors, (279493), 103293 states have internal predecessors, (279493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 279493 transitions. [2021-07-09 16:25:52,491 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 279493 transitions. Word has length 424 [2021-07-09 16:25:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:52,492 INFO L482 AbstractCegarLoop]: Abstraction has 103294 states and 279493 transitions. [2021-07-09 16:25:52,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 279493 transitions. [2021-07-09 16:25:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:52,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:52,700 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:25:52,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:52,901 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:25:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:25:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash 72264257, now seen corresponding path program 64 times [2021-07-09 16:25:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:25:52,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113268932] [2021-07-09 16:25:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:25:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:25:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:53,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:25:53,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113268932] [2021-07-09 16:25:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113268932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:53,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95017846] [2021-07-09 16:25:53,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:25:53,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:25:53,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:25:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:25:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:25:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:25:54,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95017846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:25:54,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:25:54,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:25:54,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571793672] [2021-07-09 16:25:54,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:25:54,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:25:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:25:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:25:54,354 INFO L87 Difference]: Start difference. First operand 103294 states and 279493 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:25:55,472 INFO L93 Difference]: Finished difference Result 174659 states and 470136 transitions. [2021-07-09 16:25:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:25:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:25:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:25:56,192 INFO L225 Difference]: With dead ends: 174659 [2021-07-09 16:25:56,192 INFO L226 Difference]: Without dead ends: 174659 [2021-07-09 16:25:56,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:25:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174659 states. [2021-07-09 16:25:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174659 to 105814. [2021-07-09 16:25:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105814 states, 105812 states have (on average 2.7066022757343213) internal successors, (286391), 105813 states have internal predecessors, (286391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105814 states to 105814 states and 286391 transitions. [2021-07-09 16:25:59,152 INFO L78 Accepts]: Start accepts. Automaton has 105814 states and 286391 transitions. Word has length 424 [2021-07-09 16:25:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:25:59,153 INFO L482 AbstractCegarLoop]: Abstraction has 105814 states and 286391 transitions. [2021-07-09 16:25:59,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:25:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 105814 states and 286391 transitions. [2021-07-09 16:25:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:25:59,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:25:59,820 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:00,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:00,021 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash -704947101, now seen corresponding path program 65 times [2021-07-09 16:26:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:00,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015403039] [2021-07-09 16:26:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:00,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015403039] [2021-07-09 16:26:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015403039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193743505] [2021-07-09 16:26:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:00,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:26:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:01,088 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 16:26:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193743505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:01,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:01,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:01,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125699402] [2021-07-09 16:26:01,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:01,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:01,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:01,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:01,119 INFO L87 Difference]: Start difference. First operand 105814 states and 286391 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:02,270 INFO L93 Difference]: Finished difference Result 141204 states and 378336 transitions. [2021-07-09 16:26:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:26:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:02,787 INFO L225 Difference]: With dead ends: 141204 [2021-07-09 16:26:02,788 INFO L226 Difference]: Without dead ends: 141204 [2021-07-09 16:26:02,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:26:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141204 states. [2021-07-09 16:26:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141204 to 104354. [2021-07-09 16:26:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104354 states, 104352 states have (on average 2.705420116528672) internal successors, (282316), 104353 states have internal predecessors, (282316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104354 states to 104354 states and 282316 transitions. [2021-07-09 16:26:05,757 INFO L78 Accepts]: Start accepts. Automaton has 104354 states and 282316 transitions. Word has length 424 [2021-07-09 16:26:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:05,758 INFO L482 AbstractCegarLoop]: Abstraction has 104354 states and 282316 transitions. [2021-07-09 16:26:05,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 104354 states and 282316 transitions. [2021-07-09 16:26:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:06,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:06,442 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:06,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 16:26:06,643 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1724383455, now seen corresponding path program 66 times [2021-07-09 16:26:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:06,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342361860] [2021-07-09 16:26:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:06,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:06,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342361860] [2021-07-09 16:26:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342361860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:06,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160130616] [2021-07-09 16:26:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:07,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:26:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:07,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160130616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:07,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:07,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162782056] [2021-07-09 16:26:07,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:07,728 INFO L87 Difference]: Start difference. First operand 104354 states and 282316 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:09,197 INFO L93 Difference]: Finished difference Result 183049 states and 492560 transitions. [2021-07-09 16:26:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:26:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:09,700 INFO L225 Difference]: With dead ends: 183049 [2021-07-09 16:26:09,700 INFO L226 Difference]: Without dead ends: 183049 [2021-07-09 16:26:09,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183049 states. [2021-07-09 16:26:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183049 to 110274. [2021-07-09 16:26:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110274 states, 110272 states have (on average 2.708430063842136) internal successors, (298664), 110273 states have internal predecessors, (298664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110274 states to 110274 states and 298664 transitions. [2021-07-09 16:26:13,250 INFO L78 Accepts]: Start accepts. Automaton has 110274 states and 298664 transitions. Word has length 424 [2021-07-09 16:26:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:13,250 INFO L482 AbstractCegarLoop]: Abstraction has 110274 states and 298664 transitions. [2021-07-09 16:26:13,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 110274 states and 298664 transitions. [2021-07-09 16:26:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:13,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:13,955 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 16:26:14,156 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1367417857, now seen corresponding path program 67 times [2021-07-09 16:26:14,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523488667] [2021-07-09 16:26:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:14,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:14,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523488667] [2021-07-09 16:26:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523488667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:14,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373279872] [2021-07-09 16:26:14,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:14,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373279872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:14,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:14,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:14,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952896327] [2021-07-09 16:26:14,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:14,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:14,919 INFO L87 Difference]: Start difference. First operand 110274 states and 298664 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:16,416 INFO L93 Difference]: Finished difference Result 191414 states and 515964 transitions. [2021-07-09 16:26:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:26:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:16,946 INFO L225 Difference]: With dead ends: 191414 [2021-07-09 16:26:16,946 INFO L226 Difference]: Without dead ends: 191414 [2021-07-09 16:26:16,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1336, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191414 states. [2021-07-09 16:26:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191414 to 110854. [2021-07-09 16:26:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110854 states, 110852 states have (on average 2.7083228087900983) internal successors, (300223), 110853 states have internal predecessors, (300223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110854 states to 110854 states and 300223 transitions. [2021-07-09 16:26:20,375 INFO L78 Accepts]: Start accepts. Automaton has 110854 states and 300223 transitions. Word has length 424 [2021-07-09 16:26:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:20,376 INFO L482 AbstractCegarLoop]: Abstraction has 110854 states and 300223 transitions. [2021-07-09 16:26:20,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 110854 states and 300223 transitions. [2021-07-09 16:26:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:21,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:21,114 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:21,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 16:26:21,315 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1728381277, now seen corresponding path program 68 times [2021-07-09 16:26:21,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:21,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857038716] [2021-07-09 16:26:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:21,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857038716] [2021-07-09 16:26:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857038716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84492238] [2021-07-09 16:26:21,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:21,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:26:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84492238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:22,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:22,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:22,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855691267] [2021-07-09 16:26:22,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:22,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:22,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:22,036 INFO L87 Difference]: Start difference. First operand 110854 states and 300223 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:23,129 INFO L93 Difference]: Finished difference Result 147009 states and 394083 transitions. [2021-07-09 16:26:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 16:26:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:23,781 INFO L225 Difference]: With dead ends: 147009 [2021-07-09 16:26:23,782 INFO L226 Difference]: Without dead ends: 147009 [2021-07-09 16:26:23,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=472, Invalid=1334, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 16:26:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147009 states. [2021-07-09 16:26:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147009 to 109394. [2021-07-09 16:26:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109394 states, 109392 states have (on average 2.707218078104432) internal successors, (296148), 109393 states have internal predecessors, (296148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109394 states to 109394 states and 296148 transitions. [2021-07-09 16:26:26,961 INFO L78 Accepts]: Start accepts. Automaton has 109394 states and 296148 transitions. Word has length 424 [2021-07-09 16:26:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:26,977 INFO L482 AbstractCegarLoop]: Abstraction has 109394 states and 296148 transitions. [2021-07-09 16:26:26,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 109394 states and 296148 transitions. [2021-07-09 16:26:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:27,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:27,252 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:27,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 16:26:27,452 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash -56750655, now seen corresponding path program 69 times [2021-07-09 16:26:27,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:27,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268566903] [2021-07-09 16:26:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:27,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268566903] [2021-07-09 16:26:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268566903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075043857] [2021-07-09 16:26:27,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:28,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:26:28,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075043857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:28,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:28,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781353840] [2021-07-09 16:26:28,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:28,745 INFO L87 Difference]: Start difference. First operand 109394 states and 296148 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:29,955 INFO L93 Difference]: Finished difference Result 190559 states and 513309 transitions. [2021-07-09 16:26:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:26:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:30,461 INFO L225 Difference]: With dead ends: 190559 [2021-07-09 16:26:30,461 INFO L226 Difference]: Without dead ends: 190559 [2021-07-09 16:26:30,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190559 states. [2021-07-09 16:26:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190559 to 112014. [2021-07-09 16:26:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112014 states, 112012 states have (on average 2.708433025033032) internal successors, (303377), 112013 states have internal predecessors, (303377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112014 states to 112014 states and 303377 transitions. [2021-07-09 16:26:34,399 INFO L78 Accepts]: Start accepts. Automaton has 112014 states and 303377 transitions. Word has length 424 [2021-07-09 16:26:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:34,399 INFO L482 AbstractCegarLoop]: Abstraction has 112014 states and 303377 transitions. [2021-07-09 16:26:34,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 112014 states and 303377 transitions. [2021-07-09 16:26:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:34,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:34,631 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:34,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 16:26:34,837 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -413716253, now seen corresponding path program 70 times [2021-07-09 16:26:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935822465] [2021-07-09 16:26:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:34,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935822465] [2021-07-09 16:26:34,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935822465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026976597] [2021-07-09 16:26:34,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:35,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:26:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026976597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:35,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:35,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307141566] [2021-07-09 16:26:35,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:35,948 INFO L87 Difference]: Start difference. First operand 112014 states and 303377 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:36,979 INFO L93 Difference]: Finished difference Result 146514 states and 392810 transitions. [2021-07-09 16:26:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 16:26:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:37,369 INFO L225 Difference]: With dead ends: 146514 [2021-07-09 16:26:37,369 INFO L226 Difference]: Without dead ends: 146514 [2021-07-09 16:26:37,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=483, Invalid=1409, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 16:26:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states. [2021-07-09 16:26:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146514 to 113274. [2021-07-09 16:26:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113274 states, 113272 states have (on average 2.7087541493043292) internal successors, (306826), 113273 states have internal predecessors, (306826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113274 states to 113274 states and 306826 transitions. [2021-07-09 16:26:41,094 INFO L78 Accepts]: Start accepts. Automaton has 113274 states and 306826 transitions. Word has length 424 [2021-07-09 16:26:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:41,094 INFO L482 AbstractCegarLoop]: Abstraction has 113274 states and 306826 transitions. [2021-07-09 16:26:41,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 113274 states and 306826 transitions. [2021-07-09 16:26:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-07-09 16:26:41,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:41,408 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:41,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:41,633 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1254886621, now seen corresponding path program 71 times [2021-07-09 16:26:41,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:41,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474924636] [2021-07-09 16:26:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:41,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474924636] [2021-07-09 16:26:41,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474924636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781834289] [2021-07-09 16:26:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:42,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:26:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 27 proven. 1317 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-07-09 16:26:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781834289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:43,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:43,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-09 16:26:43,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918754370] [2021-07-09 16:26:43,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 16:26:43,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 16:26:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 16:26:43,082 INFO L87 Difference]: Start difference. First operand 113274 states and 306826 transitions. Second operand has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:44,106 INFO L93 Difference]: Finished difference Result 144324 states and 386976 transitions. [2021-07-09 16:26:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:26:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-07-09 16:26:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:44,449 INFO L225 Difference]: With dead ends: 144324 [2021-07-09 16:26:44,450 INFO L226 Difference]: Without dead ends: 144324 [2021-07-09 16:26:44,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=494, Invalid=1486, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 16:26:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144324 states. [2021-07-09 16:26:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144324 to 115214. [2021-07-09 16:26:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115214 states, 115212 states have (on average 2.709483387147172) internal successors, (312165), 115213 states have internal predecessors, (312165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115214 states to 115214 states and 312165 transitions. [2021-07-09 16:26:47,616 INFO L78 Accepts]: Start accepts. Automaton has 115214 states and 312165 transitions. Word has length 424 [2021-07-09 16:26:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:47,617 INFO L482 AbstractCegarLoop]: Abstraction has 115214 states and 312165 transitions. [2021-07-09 16:26:47,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 19.666666666666668) internal successors, (413), 21 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 115214 states and 312165 transitions. [2021-07-09 16:26:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-07-09 16:26:48,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:48,322 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:48,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 16:26:48,525 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1370718820, now seen corresponding path program 11 times [2021-07-09 16:26:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:48,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973625303] [2021-07-09 16:26:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:48,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973625303] [2021-07-09 16:26:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973625303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277689323] [2021-07-09 16:26:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:49,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 16:26:49,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 33 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:26:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277689323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:49,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:49,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-09 16:26:49,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851335511] [2021-07-09 16:26:49,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 16:26:49,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:49,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 16:26:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-09 16:26:49,950 INFO L87 Difference]: Start difference. First operand 115214 states and 312165 transitions. Second operand has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:51,078 INFO L93 Difference]: Finished difference Result 127423 states and 343370 transitions. [2021-07-09 16:26:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:26:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 428 [2021-07-09 16:26:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:51,397 INFO L225 Difference]: With dead ends: 127423 [2021-07-09 16:26:51,397 INFO L226 Difference]: Without dead ends: 127423 [2021-07-09 16:26:51,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=841, Invalid=1709, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 16:26:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2021-07-09 16:26:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 117696. [2021-07-09 16:26:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-09 16:26:54,636 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 428 [2021-07-09 16:26:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:26:54,636 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-09 16:26:54,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 17.59259259259259) internal successors, (475), 27 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-09 16:26:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:26:54,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:26:54,876 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:26:55,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:55,077 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:26:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:26:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1307848988, now seen corresponding path program 35 times [2021-07-09 16:26:55,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:26:55,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203857673] [2021-07-09 16:26:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:26:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:26:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1669 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 16:26:55,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:26:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203857673] [2021-07-09 16:26:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203857673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548614370] [2021-07-09 16:26:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:26:55,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:26:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:26:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:26:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:26:56,164 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 16:26:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:26:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548614370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:26:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:26:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-09 16:26:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965323055] [2021-07-09 16:26:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:26:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:26:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:26:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:26:56,491 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:26:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:26:57,560 INFO L93 Difference]: Finished difference Result 134006 states and 360130 transitions. [2021-07-09 16:26:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:26:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:26:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:26:57,886 INFO L225 Difference]: With dead ends: 134006 [2021-07-09 16:26:57,886 INFO L226 Difference]: Without dead ends: 134006 [2021-07-09 16:26:57,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:26:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134006 states. [2021-07-09 16:27:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134006 to 118376. [2021-07-09 16:27:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118376 states, 118374 states have (on average 2.707984861540541) internal successors, (320555), 118375 states have internal predecessors, (320555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118376 states to 118376 states and 320555 transitions. [2021-07-09 16:27:01,098 INFO L78 Accepts]: Start accepts. Automaton has 118376 states and 320555 transitions. Word has length 429 [2021-07-09 16:27:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:01,098 INFO L482 AbstractCegarLoop]: Abstraction has 118376 states and 320555 transitions. [2021-07-09 16:27:01,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 118376 states and 320555 transitions. [2021-07-09 16:27:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:01,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:01,351 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:01,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:01,552 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1701005510, now seen corresponding path program 36 times [2021-07-09 16:27:01,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:01,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732559880] [2021-07-09 16:27:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:01,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:01,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732559880] [2021-07-09 16:27:01,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732559880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:01,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073299743] [2021-07-09 16:27:01,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:02,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:27:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:03,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073299743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:03,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:03,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:03,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271139028] [2021-07-09 16:27:03,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:03,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:03,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:03,064 INFO L87 Difference]: Start difference. First operand 118376 states and 320555 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:04,114 INFO L93 Difference]: Finished difference Result 141701 states and 379687 transitions. [2021-07-09 16:27:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 16:27:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:04,456 INFO L225 Difference]: With dead ends: 141701 [2021-07-09 16:27:04,456 INFO L226 Difference]: Without dead ends: 141701 [2021-07-09 16:27:04,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=627, Invalid=1443, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 16:27:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141701 states. [2021-07-09 16:27:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141701 to 117696. [2021-07-09 16:27:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117696 states, 117694 states have (on average 2.7075721787006986) internal successors, (318665), 117695 states have internal predecessors, (318665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117696 states to 117696 states and 318665 transitions. [2021-07-09 16:27:07,770 INFO L78 Accepts]: Start accepts. Automaton has 117696 states and 318665 transitions. Word has length 429 [2021-07-09 16:27:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:07,770 INFO L482 AbstractCegarLoop]: Abstraction has 117696 states and 318665 transitions. [2021-07-09 16:27:07,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 117696 states and 318665 transitions. [2021-07-09 16:27:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:08,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:08,516 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:08,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-09 16:27:08,733 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:08,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2095438632, now seen corresponding path program 37 times [2021-07-09 16:27:08,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:08,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978061589] [2021-07-09 16:27:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:08,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:08,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978061589] [2021-07-09 16:27:08,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978061589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:08,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292034984] [2021-07-09 16:27:08,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:09,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292034984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:09,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:09,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:09,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129781445] [2021-07-09 16:27:09,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:09,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:09,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:09,507 INFO L87 Difference]: Start difference. First operand 117696 states and 318665 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:10,919 INFO L93 Difference]: Finished difference Result 143841 states and 386037 transitions. [2021-07-09 16:27:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 16:27:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:11,302 INFO L225 Difference]: With dead ends: 143841 [2021-07-09 16:27:11,302 INFO L226 Difference]: Without dead ends: 143841 [2021-07-09 16:27:11,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=639, Invalid=1523, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 16:27:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143841 states. [2021-07-09 16:27:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143841 to 117016. [2021-07-09 16:27:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117016 states, 117014 states have (on average 2.707154699437674) internal successors, (316775), 117015 states have internal predecessors, (316775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117016 states to 117016 states and 316775 transitions. [2021-07-09 16:27:15,030 INFO L78 Accepts]: Start accepts. Automaton has 117016 states and 316775 transitions. Word has length 429 [2021-07-09 16:27:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:15,030 INFO L482 AbstractCegarLoop]: Abstraction has 117016 states and 316775 transitions. [2021-07-09 16:27:15,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 117016 states and 316775 transitions. [2021-07-09 16:27:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:15,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:15,362 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:15,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:15,577 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1753327114, now seen corresponding path program 38 times [2021-07-09 16:27:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:15,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154081916] [2021-07-09 16:27:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:15,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154081916] [2021-07-09 16:27:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154081916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688965542] [2021-07-09 16:27:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:16,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:27:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:16,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688965542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:16,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:16,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934634351] [2021-07-09 16:27:16,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:16,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:16,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:16,890 INFO L87 Difference]: Start difference. First operand 117016 states and 316775 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:18,032 INFO L93 Difference]: Finished difference Result 148126 states and 396802 transitions. [2021-07-09 16:27:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 16:27:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:18,428 INFO L225 Difference]: With dead ends: 148126 [2021-07-09 16:27:18,429 INFO L226 Difference]: Without dead ends: 148126 [2021-07-09 16:27:18,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=651, Invalid=1605, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 16:27:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148126 states. [2021-07-09 16:27:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148126 to 115656. [2021-07-09 16:27:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115656 states, 115654 states have (on average 2.706305013229114) internal successors, (312995), 115655 states have internal predecessors, (312995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 312995 transitions. [2021-07-09 16:27:21,831 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 312995 transitions. Word has length 429 [2021-07-09 16:27:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:21,831 INFO L482 AbstractCegarLoop]: Abstraction has 115656 states and 312995 transitions. [2021-07-09 16:27:21,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 312995 transitions. [2021-07-09 16:27:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:22,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:22,551 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:22,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:22,752 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:22,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1571604844, now seen corresponding path program 39 times [2021-07-09 16:27:22,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:22,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277944102] [2021-07-09 16:27:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:22,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:22,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277944102] [2021-07-09 16:27:22,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277944102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:22,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974625769] [2021-07-09 16:27:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:23,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 16:27:23,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974625769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:23,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:23,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:23,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867296364] [2021-07-09 16:27:23,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:23,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:23,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:23,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:23,990 INFO L87 Difference]: Start difference. First operand 115656 states and 312995 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:25,094 INFO L93 Difference]: Finished difference Result 152051 states and 406986 transitions. [2021-07-09 16:27:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 16:27:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:25,683 INFO L225 Difference]: With dead ends: 152051 [2021-07-09 16:27:25,683 INFO L226 Difference]: Without dead ends: 152051 [2021-07-09 16:27:25,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 16:27:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152051 states. [2021-07-09 16:27:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152051 to 116236. [2021-07-09 16:27:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116236 states, 116234 states have (on average 2.7062133282860437) internal successors, (314554), 116235 states have internal predecessors, (314554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116236 states to 116236 states and 314554 transitions. [2021-07-09 16:27:29,180 INFO L78 Accepts]: Start accepts. Automaton has 116236 states and 314554 transitions. Word has length 429 [2021-07-09 16:27:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:29,180 INFO L482 AbstractCegarLoop]: Abstraction has 116236 states and 314554 transitions. [2021-07-09 16:27:29,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 116236 states and 314554 transitions. [2021-07-09 16:27:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:29,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:29,421 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:29,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 16:27:29,621 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash -962946382, now seen corresponding path program 40 times [2021-07-09 16:27:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089392436] [2021-07-09 16:27:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:29,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:29,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089392436] [2021-07-09 16:27:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089392436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:29,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407850323] [2021-07-09 16:27:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:30,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:27:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:31,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407850323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:31,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:31,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488034888] [2021-07-09 16:27:31,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:31,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:31,166 INFO L87 Difference]: Start difference. First operand 116236 states and 314554 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:32,337 INFO L93 Difference]: Finished difference Result 153516 states and 410830 transitions. [2021-07-09 16:27:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 16:27:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:32,724 INFO L225 Difference]: With dead ends: 153516 [2021-07-09 16:27:32,724 INFO L226 Difference]: Without dead ends: 153516 [2021-07-09 16:27:32,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=675, Invalid=1775, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 16:27:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153516 states. [2021-07-09 16:27:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153516 to 114976. [2021-07-09 16:27:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114976 states, 114974 states have (on average 2.7058726320733384) internal successors, (311105), 114975 states have internal predecessors, (311105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114976 states to 114976 states and 311105 transitions. [2021-07-09 16:27:36,084 INFO L78 Accepts]: Start accepts. Automaton has 114976 states and 311105 transitions. Word has length 429 [2021-07-09 16:27:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:36,085 INFO L482 AbstractCegarLoop]: Abstraction has 114976 states and 311105 transitions. [2021-07-09 16:27:36,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 114976 states and 311105 transitions. [2021-07-09 16:27:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:36,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:36,852 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:37,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:37,053 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 500065872, now seen corresponding path program 41 times [2021-07-09 16:27:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:37,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28368596] [2021-07-09 16:27:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:37,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28368596] [2021-07-09 16:27:37,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28368596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:37,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189528750] [2021-07-09 16:27:37,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:37,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 16:27:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:38,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189528750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:38,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:38,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:38,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167481346] [2021-07-09 16:27:38,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:38,051 INFO L87 Difference]: Start difference. First operand 114976 states and 311105 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:39,489 INFO L93 Difference]: Finished difference Result 152841 states and 409174 transitions. [2021-07-09 16:27:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 16:27:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:39,938 INFO L225 Difference]: With dead ends: 152841 [2021-07-09 16:27:39,939 INFO L226 Difference]: Without dead ends: 152841 [2021-07-09 16:27:39,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 16:27:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152841 states. [2021-07-09 16:27:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152841 to 113716. [2021-07-09 16:27:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-09 16:27:43,288 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-09 16:27:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-09 16:27:43,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-09 16:27:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:43,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:43,522 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:43,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 16:27:43,724 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -706709138, now seen corresponding path program 42 times [2021-07-09 16:27:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:43,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466102876] [2021-07-09 16:27:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:43,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:43,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466102876] [2021-07-09 16:27:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466102876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:43,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80950607] [2021-07-09 16:27:43,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:44,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 16:27:44,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:45,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80950607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:45,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:45,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:45,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170413610] [2021-07-09 16:27:45,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:45,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:45,237 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:46,313 INFO L93 Difference]: Finished difference Result 147066 states and 393838 transitions. [2021-07-09 16:27:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 16:27:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:46,688 INFO L225 Difference]: With dead ends: 147066 [2021-07-09 16:27:46,688 INFO L226 Difference]: Without dead ends: 147066 [2021-07-09 16:27:46,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 16:27:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147066 states. [2021-07-09 16:27:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147066 to 113716. [2021-07-09 16:27:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113716 states, 113714 states have (on average 2.7055243857396625) internal successors, (307656), 113715 states have internal predecessors, (307656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113716 states to 113716 states and 307656 transitions. [2021-07-09 16:27:50,532 INFO L78 Accepts]: Start accepts. Automaton has 113716 states and 307656 transitions. Word has length 429 [2021-07-09 16:27:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:50,533 INFO L482 AbstractCegarLoop]: Abstraction has 113716 states and 307656 transitions. [2021-07-09 16:27:50,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 113716 states and 307656 transitions. [2021-07-09 16:27:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-07-09 16:27:50,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:50,852 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:51,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:51,078 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -818236404, now seen corresponding path program 43 times [2021-07-09 16:27:51,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:51,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646403577] [2021-07-09 16:27:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:51,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:51,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646403577] [2021-07-09 16:27:51,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646403577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:51,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116308739] [2021-07-09 16:27:51,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 16:27:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 30 proven. 1646 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-07-09 16:27:52,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116308739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:52,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:52,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-09 16:27:52,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632320789] [2021-07-09 16:27:52,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 16:27:52,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 16:27:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 16:27:52,320 INFO L87 Difference]: Start difference. First operand 113716 states and 307656 transitions. Second operand has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:27:53,431 INFO L93 Difference]: Finished difference Result 141826 states and 380190 transitions. [2021-07-09 16:27:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 16:27:53,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-07-09 16:27:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:27:53,780 INFO L225 Difference]: With dead ends: 141826 [2021-07-09 16:27:53,780 INFO L226 Difference]: Without dead ends: 141826 [2021-07-09 16:27:53,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=711, Invalid=2045, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 16:27:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141826 states. [2021-07-09 16:27:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141826 to 110996. [2021-07-09 16:27:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110996 states, 110994 states have (on average 2.7037137142548247) internal successors, (300096), 110995 states have internal predecessors, (300096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110996 states to 110996 states and 300096 transitions. [2021-07-09 16:27:56,988 INFO L78 Accepts]: Start accepts. Automaton has 110996 states and 300096 transitions. Word has length 429 [2021-07-09 16:27:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:27:56,988 INFO L482 AbstractCegarLoop]: Abstraction has 110996 states and 300096 transitions. [2021-07-09 16:27:56,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 18.833333333333332) internal successors, (452), 24 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:27:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 110996 states and 300096 transitions. [2021-07-09 16:27:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-07-09 16:27:57,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:27:57,245 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:27:57,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 16:27:57,446 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:27:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:27:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1983477794, now seen corresponding path program 72 times [2021-07-09 16:27:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:27:57,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71899649] [2021-07-09 16:27:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:27:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:27:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1124 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-07-09 16:27:57,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:27:57,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71899649] [2021-07-09 16:27:57,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71899649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:57,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054455398] [2021-07-09 16:27:57,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:27:58,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 16:27:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:27:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:27:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:27:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 24 proven. 1101 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-07-09 16:27:58,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054455398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:27:58,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:27:58,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-09 16:27:58,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318842754] [2021-07-09 16:27:58,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 16:27:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:27:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 16:27:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 16:27:58,948 INFO L87 Difference]: Start difference. First operand 110996 states and 300096 transitions. Second operand has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:00,113 INFO L93 Difference]: Finished difference Result 202896 states and 543282 transitions. [2021-07-09 16:28:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 16:28:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2021-07-09 16:28:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:01,004 INFO L225 Difference]: With dead ends: 202896 [2021-07-09 16:28:01,004 INFO L226 Difference]: Without dead ends: 202896 [2021-07-09 16:28:01,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 16:28:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202896 states. [2021-07-09 16:28:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202896 to 136196. [2021-07-09 16:28:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136194 states have (on average 2.711250128493179) internal successors, (369256), 136195 states have internal predecessors, (369256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 369256 transitions. [2021-07-09 16:28:05,405 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 369256 transitions. Word has length 448 [2021-07-09 16:28:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:05,406 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 369256 transitions. [2021-07-09 16:28:05,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 21.705882352941178) internal successors, (369), 17 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 369256 transitions. [2021-07-09 16:28:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:05,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:05,696 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:05,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:05,897 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2099316009, now seen corresponding path program 73 times [2021-07-09 16:28:05,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:05,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074944450] [2021-07-09 16:28:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:06,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:06,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074944450] [2021-07-09 16:28:06,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074944450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:06,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321166317] [2021-07-09 16:28:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:06,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:07,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321166317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:07,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:07,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:07,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513317459] [2021-07-09 16:28:07,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:07,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:07,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:07,080 INFO L87 Difference]: Start difference. First operand 136196 states and 369256 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:08,185 INFO L93 Difference]: Finished difference Result 191246 states and 514845 transitions. [2021-07-09 16:28:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:28:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:09,011 INFO L225 Difference]: With dead ends: 191246 [2021-07-09 16:28:09,011 INFO L226 Difference]: Without dead ends: 191246 [2021-07-09 16:28:09,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 704.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:28:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191246 states. [2021-07-09 16:28:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191246 to 138816. [2021-07-09 16:28:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138816 states, 138814 states have (on average 2.7121543936490555) internal successors, (376485), 138815 states have internal predecessors, (376485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138816 states to 138816 states and 376485 transitions. [2021-07-09 16:28:13,361 INFO L78 Accepts]: Start accepts. Automaton has 138816 states and 376485 transitions. Word has length 453 [2021-07-09 16:28:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:13,361 INFO L482 AbstractCegarLoop]: Abstraction has 138816 states and 376485 transitions. [2021-07-09 16:28:13,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 138816 states and 376485 transitions. [2021-07-09 16:28:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:13,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:13,661 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:13,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 16:28:13,862 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1632211019, now seen corresponding path program 74 times [2021-07-09 16:28:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:13,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625300423] [2021-07-09 16:28:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:14,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625300423] [2021-07-09 16:28:14,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625300423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072874788] [2021-07-09 16:28:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:14,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:28:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:14,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072874788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:14,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:14,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:14,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701172142] [2021-07-09 16:28:14,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:14,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:14,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:14,876 INFO L87 Difference]: Start difference. First operand 138816 states and 376485 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:16,294 INFO L93 Difference]: Finished difference Result 242711 states and 655917 transitions. [2021-07-09 16:28:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:16,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:17,454 INFO L225 Difference]: With dead ends: 242711 [2021-07-09 16:28:17,454 INFO L226 Difference]: Without dead ends: 242711 [2021-07-09 16:28:17,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=402, Invalid=1238, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242711 states. [2021-07-09 16:28:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242711 to 140176. [2021-07-09 16:28:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140176 states, 140174 states have (on average 2.7128069399460673) internal successors, (380265), 140175 states have internal predecessors, (380265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140176 states to 140176 states and 380265 transitions. [2021-07-09 16:28:21,977 INFO L78 Accepts]: Start accepts. Automaton has 140176 states and 380265 transitions. Word has length 453 [2021-07-09 16:28:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:21,978 INFO L482 AbstractCegarLoop]: Abstraction has 140176 states and 380265 transitions. [2021-07-09 16:28:21,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 140176 states and 380265 transitions. [2021-07-09 16:28:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:22,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:22,271 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:22,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:22,471 INFO L430 AbstractCegarLoop]: === Iteration 132 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1989176617, now seen corresponding path program 75 times [2021-07-09 16:28:22,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:22,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417011124] [2021-07-09 16:28:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:23,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:23,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417011124] [2021-07-09 16:28:23,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417011124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:23,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513644178] [2021-07-09 16:28:23,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:23,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:28:23,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:23,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:23,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:24,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513644178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:24,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:24,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:24,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236451406] [2021-07-09 16:28:24,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:24,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:24,095 INFO L87 Difference]: Start difference. First operand 140176 states and 380265 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:25,766 INFO L93 Difference]: Finished difference Result 195006 states and 525329 transitions. [2021-07-09 16:28:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:26,395 INFO L225 Difference]: With dead ends: 195006 [2021-07-09 16:28:26,395 INFO L226 Difference]: Without dead ends: 195006 [2021-07-09 16:28:26,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195006 states. [2021-07-09 16:28:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195006 to 141436. [2021-07-09 16:28:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141436 states, 141434 states have (on average 2.71302515661015) internal successors, (383714), 141435 states have internal predecessors, (383714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141436 states to 141436 states and 383714 transitions. [2021-07-09 16:28:30,807 INFO L78 Accepts]: Start accepts. Automaton has 141436 states and 383714 transitions. Word has length 453 [2021-07-09 16:28:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:30,807 INFO L482 AbstractCegarLoop]: Abstraction has 141436 states and 383714 transitions. [2021-07-09 16:28:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 141436 states and 383714 transitions. [2021-07-09 16:28:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:31,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:31,070 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:31,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:31,271 INFO L430 AbstractCegarLoop]: === Iteration 133 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1806118163, now seen corresponding path program 76 times [2021-07-09 16:28:31,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:31,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846843639] [2021-07-09 16:28:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:31,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846843639] [2021-07-09 16:28:31,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846843639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196443870] [2021-07-09 16:28:31,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:31,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:28:31,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196443870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:32,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:32,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:32,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891377155] [2021-07-09 16:28:32,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:32,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:32,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:32,698 INFO L87 Difference]: Start difference. First operand 141436 states and 383714 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:34,112 INFO L93 Difference]: Finished difference Result 237521 states and 641183 transitions. [2021-07-09 16:28:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:28:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:35,189 INFO L225 Difference]: With dead ends: 237521 [2021-07-09 16:28:35,190 INFO L226 Difference]: Without dead ends: 237521 [2021-07-09 16:28:35,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:28:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237521 states. [2021-07-09 16:28:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237521 to 143476. [2021-07-09 16:28:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-09 16:28:39,711 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-09 16:28:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-09 16:28:39,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-09 16:28:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:40,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:40,480 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:40,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:40,680 INFO L430 AbstractCegarLoop]: === Iteration 134 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1449152565, now seen corresponding path program 77 times [2021-07-09 16:28:40,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:40,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652871438] [2021-07-09 16:28:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:40,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:40,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652871438] [2021-07-09 16:28:40,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652871438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:40,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415494925] [2021-07-09 16:28:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:41,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:28:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:41,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:41,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415494925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:41,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:41,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047654688] [2021-07-09 16:28:41,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:41,602 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:41,828 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 16:28:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:43,297 INFO L93 Difference]: Finished difference Result 244576 states and 661325 transitions. [2021-07-09 16:28:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:28:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:44,018 INFO L225 Difference]: With dead ends: 244576 [2021-07-09 16:28:44,018 INFO L226 Difference]: Without dead ends: 244576 [2021-07-09 16:28:44,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:28:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244576 states. [2021-07-09 16:28:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244576 to 143476. [2021-07-09 16:28:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143476 states, 143474 states have (on average 2.7139690815060566) internal successors, (389384), 143475 states have internal predecessors, (389384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143476 states to 143476 states and 389384 transitions. [2021-07-09 16:28:48,923 INFO L78 Accepts]: Start accepts. Automaton has 143476 states and 389384 transitions. Word has length 453 [2021-07-09 16:28:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:48,923 INFO L482 AbstractCegarLoop]: Abstraction has 143476 states and 389384 transitions. [2021-07-09 16:28:48,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 143476 states and 389384 transitions. [2021-07-09 16:28:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:49,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:49,218 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:49,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 16:28:49,420 INFO L430 AbstractCegarLoop]: === Iteration 135 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1646646569, now seen corresponding path program 78 times [2021-07-09 16:28:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:49,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457460382] [2021-07-09 16:28:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:49,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457460382] [2021-07-09 16:28:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457460382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095131839] [2021-07-09 16:28:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:50,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 16:28:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:28:50,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095131839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:50,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:50,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197958915] [2021-07-09 16:28:50,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:50,886 INFO L87 Difference]: Start difference. First operand 143476 states and 389384 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:28:52,046 INFO L93 Difference]: Finished difference Result 196156 states and 527597 transitions. [2021-07-09 16:28:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:28:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:28:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:28:52,851 INFO L225 Difference]: With dead ends: 196156 [2021-07-09 16:28:52,852 INFO L226 Difference]: Without dead ends: 196156 [2021-07-09 16:28:52,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:28:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196156 states. [2021-07-09 16:28:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196156 to 144636. [2021-07-09 16:28:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144636 states, 144634 states have (on average 2.714009154140797) internal successors, (392538), 144635 states have internal predecessors, (392538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144636 states to 144636 states and 392538 transitions. [2021-07-09 16:28:57,297 INFO L78 Accepts]: Start accepts. Automaton has 144636 states and 392538 transitions. Word has length 453 [2021-07-09 16:28:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:28:57,298 INFO L482 AbstractCegarLoop]: Abstraction has 144636 states and 392538 transitions. [2021-07-09 16:28:57,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:28:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 144636 states and 392538 transitions. [2021-07-09 16:28:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:28:57,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:28:57,611 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:28:57,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 16:28:57,812 INFO L430 AbstractCegarLoop]: === Iteration 136 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:28:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:28:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash -977333519, now seen corresponding path program 79 times [2021-07-09 16:28:57,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:28:57,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981432409] [2021-07-09 16:28:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:28:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:28:57,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:28:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981432409] [2021-07-09 16:28:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981432409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341233058] [2021-07-09 16:28:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:28:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:28:58,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:28:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:28:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:28:58,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341233058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:28:58,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:28:58,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:28:58,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642650670] [2021-07-09 16:28:58,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:28:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:28:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:28:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:28:58,804 INFO L87 Difference]: Start difference. First operand 144636 states and 392538 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:00,107 INFO L93 Difference]: Finished difference Result 209401 states and 563969 transitions. [2021-07-09 16:29:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 16:29:00,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:29:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:01,205 INFO L225 Difference]: With dead ends: 209401 [2021-07-09 16:29:01,205 INFO L226 Difference]: Without dead ends: 209401 [2021-07-09 16:29:01,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 16:29:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209401 states. [2021-07-09 16:29:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209401 to 146676. [2021-07-09 16:29:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146676 states, 146674 states have (on average 2.7149187995145696) internal successors, (398208), 146675 states have internal predecessors, (398208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146676 states to 146676 states and 398208 transitions. [2021-07-09 16:29:06,250 INFO L78 Accepts]: Start accepts. Automaton has 146676 states and 398208 transitions. Word has length 453 [2021-07-09 16:29:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:06,251 INFO L482 AbstractCegarLoop]: Abstraction has 146676 states and 398208 transitions. [2021-07-09 16:29:06,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 146676 states and 398208 transitions. [2021-07-09 16:29:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:06,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:06,553 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:06,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 16:29:06,753 INFO L430 AbstractCegarLoop]: === Iteration 137 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1334299117, now seen corresponding path program 80 times [2021-07-09 16:29:06,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:06,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296883452] [2021-07-09 16:29:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:06,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:06,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296883452] [2021-07-09 16:29:06,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296883452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870596091] [2021-07-09 16:29:06,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:07,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:29:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870596091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:07,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:07,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:07,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114138987] [2021-07-09 16:29:07,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:07,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:07,758 INFO L87 Difference]: Start difference. First operand 146676 states and 398208 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:09,106 INFO L93 Difference]: Finished difference Result 218806 states and 590153 transitions. [2021-07-09 16:29:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:29:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:10,068 INFO L225 Difference]: With dead ends: 218806 [2021-07-09 16:29:10,069 INFO L226 Difference]: Without dead ends: 218806 [2021-07-09 16:29:10,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 16:29:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218806 states. [2021-07-09 16:29:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218806 to 145996. [2021-07-09 16:29:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145996 states, 145994 states have (on average 2.7146184089757113) internal successors, (396318), 145995 states have internal predecessors, (396318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145996 states to 145996 states and 396318 transitions. [2021-07-09 16:29:14,520 INFO L78 Accepts]: Start accepts. Automaton has 145996 states and 396318 transitions. Word has length 453 [2021-07-09 16:29:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:14,520 INFO L482 AbstractCegarLoop]: Abstraction has 145996 states and 396318 transitions. [2021-07-09 16:29:14,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 145996 states and 396318 transitions. [2021-07-09 16:29:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:14,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:14,834 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:15,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 16:29:15,035 INFO L430 AbstractCegarLoop]: === Iteration 138 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -135130955, now seen corresponding path program 81 times [2021-07-09 16:29:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:15,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640975713] [2021-07-09 16:29:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:15,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:15,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640975713] [2021-07-09 16:29:15,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640975713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:15,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723617952] [2021-07-09 16:29:15,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:16,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 16:29:16,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:16,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:16,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723617952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:16,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:16,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:16,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149690030] [2021-07-09 16:29:16,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:16,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:16,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:16,541 INFO L87 Difference]: Start difference. First operand 145996 states and 396318 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:18,053 INFO L93 Difference]: Finished difference Result 216356 states and 582998 transitions. [2021-07-09 16:29:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:29:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:18,775 INFO L225 Difference]: With dead ends: 216356 [2021-07-09 16:29:18,775 INFO L226 Difference]: Without dead ends: 216356 [2021-07-09 16:29:18,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216356 states. [2021-07-09 16:29:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216356 to 145996. [2021-07-09 16:29:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145996 states, 145994 states have (on average 2.7146184089757113) internal successors, (396318), 145995 states have internal predecessors, (396318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145996 states to 145996 states and 396318 transitions. [2021-07-09 16:29:23,327 INFO L78 Accepts]: Start accepts. Automaton has 145996 states and 396318 transitions. Word has length 453 [2021-07-09 16:29:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 145996 states and 396318 transitions. [2021-07-09 16:29:23,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 145996 states and 396318 transitions. [2021-07-09 16:29:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:23,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:23,623 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 16:29:23,824 INFO L430 AbstractCegarLoop]: === Iteration 139 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -912342313, now seen corresponding path program 82 times [2021-07-09 16:29:23,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:23,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315546620] [2021-07-09 16:29:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-07-09 16:29:24,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315546620] [2021-07-09 16:29:24,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315546620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671916936] [2021-07-09 16:29:24,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:24,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:29:24,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:25,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671916936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:25,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:25,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-09 16:29:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582692921] [2021-07-09 16:29:25,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:25,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:25,075 INFO L87 Difference]: Start difference. First operand 145996 states and 396318 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:26,167 INFO L93 Difference]: Finished difference Result 181801 states and 487363 transitions. [2021-07-09 16:29:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 16:29:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:29:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:26,899 INFO L225 Difference]: With dead ends: 181801 [2021-07-09 16:29:26,900 INFO L226 Difference]: Without dead ends: 181801 [2021-07-09 16:29:26,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 16:29:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181801 states. [2021-07-09 16:29:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181801 to 141636. [2021-07-09 16:29:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141636 states, 141634 states have (on average 2.7138681390061707) internal successors, (384376), 141635 states have internal predecessors, (384376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141636 states to 141636 states and 384376 transitions. [2021-07-09 16:29:31,262 INFO L78 Accepts]: Start accepts. Automaton has 141636 states and 384376 transitions. Word has length 453 [2021-07-09 16:29:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:29:31,262 INFO L482 AbstractCegarLoop]: Abstraction has 141636 states and 384376 transitions. [2021-07-09 16:29:31,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 141636 states and 384376 transitions. [2021-07-09 16:29:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-07-09 16:29:31,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:29:31,552 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:29:31,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:31,769 INFO L430 AbstractCegarLoop]: === Iteration 140 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:29:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:29:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1489521333, now seen corresponding path program 83 times [2021-07-09 16:29:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:29:31,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407882575] [2021-07-09 16:29:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:29:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:29:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:31,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:29:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407882575] [2021-07-09 16:29:31,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407882575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937373480] [2021-07-09 16:29:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:29:32,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 16:29:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:29:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 16:29:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:29:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 27 proven. 1338 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-07-09 16:29:32,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937373480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:29:32,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:29:32,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-09 16:29:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188952865] [2021-07-09 16:29:32,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 16:29:32,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:29:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 16:29:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-09 16:29:32,963 INFO L87 Difference]: Start difference. First operand 141636 states and 384376 transitions. Second operand has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:29:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:29:34,253 INFO L93 Difference]: Finished difference Result 212026 states and 571962 transitions. [2021-07-09 16:29:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:29:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 20.4) internal successors, (408), 20 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2021-07-09 16:29:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:29:35,431 INFO L225 Difference]: With dead ends: 212026 [2021-07-09 16:29:35,432 INFO L226 Difference]: Without dead ends: 212026 [2021-07-09 16:29:35,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 Received shutdown request... [2021-07-09 16:29:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212026 states. [2021-07-09 16:29:36,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 16:29:36,121 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:29:36,121 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-09 16:29:36,123 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 16:29:36,124 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:29:36,124 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:29:36,124 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:29:36,124 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:29:36,124 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:29:36,124 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:29:36,124 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:29:36,124 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:29:36,126 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:29:36,126 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:29:36,126 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-09 16:29:36,127 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-09 16:29:36,127 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:29:36,127 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:29:36,127 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:29:36,127 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:29:36,127 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:29:36,127 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:29:36,127 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:29:36,127 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-09 16:29:36,135 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 145 places, 150 transitions, 322 flow [2021-07-09 16:29:36,147 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 16:29:36,148 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-09 16:29:36,148 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:29:36,150 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 16:29:36,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:29:36 BasicIcfg [2021-07-09 16:29:36,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:29:36,151 INFO L168 Benchmark]: Toolchain (without parser) took 665163.29 ms. Allocated memory was 209.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 171.6 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 209.7 MB. Free memory is still 190.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 502.50 ms. Allocated memory is still 209.7 MB. Free memory was 171.5 MB in the beginning and 172.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 209.7 MB. Free memory was 172.9 MB in the beginning and 170.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: Boogie Preprocessor took 56.91 ms. Allocated memory is still 209.7 MB. Free memory was 170.3 MB in the beginning and 168.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: RCFGBuilder took 575.29 ms. Allocated memory is still 209.7 MB. Free memory was 168.2 MB in the beginning and 135.1 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L168 Benchmark]: TraceAbstraction took 663975.08 ms. Allocated memory was 209.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 134.6 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-09 16:29:36,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 209.7 MB. Free memory is still 190.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 502.50 ms. Allocated memory is still 209.7 MB. Free memory was 171.5 MB in the beginning and 172.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.62 ms. Allocated memory is still 209.7 MB. Free memory was 172.9 MB in the beginning and 170.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.91 ms. Allocated memory is still 209.7 MB. Free memory was 170.3 MB in the beginning and 168.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 575.29 ms. Allocated memory is still 209.7 MB. Free memory was 168.2 MB in the beginning and 135.1 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 663975.08 ms. Allocated memory was 209.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 134.6 MB in the beginning and 6.9 GB in the end (delta: -6.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 145 places, 150 transitions, 322 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 663757.4ms, OverallIterations: 140, TraceHistogramMax: 12, EmptinessCheckTime: 30439.4ms, AutomataDifference: 161223.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 281.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21010 SDtfs, 181294 SDslu, 180328 SDs, 0 SdLazy, 21069 SolverSat, 5890 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11137.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55379 GetRequests, 50598 SyntacticMatches, 1 SemanticMatches, 4780 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38554 ImplicationChecksByTransitivity, 37780.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=146676occurred in iteration=136, InterpolantAutomatonStates: 3877, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 301994.8ms AutomataMinimizationTime, 140 MinimizatonAttempts, 4259272 StatesRemovedByMinimization, 139 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6497.0ms SsaConstructionTime, 35163.1ms SatisfiabilityAnalysisTime, 91687.4ms InterpolantComputationTime, 100242 NumberOfCodeBlocks, 100077 NumberOfCodeBlocksAsserted, 834 NumberOfCheckSat, 99965 ConstructedInterpolants, 0 QuantifiedInterpolants, 290378 SizeOfPredicates, 2518 NumberOfNonLiveVariables, 96551 ConjunctsInSsa, 2806 ConjunctsInUnsatCore, 277 InterpolantComputations, 4 PerfectInterpolantSequences, 21519/290682 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 230 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 20.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !ENTRY org.eclipse.osgi 4 0 2021-07-09 16:29:36.388 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f806e0aea/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f806e0aea/.metadata/.log.